H Calkins

Summary

Affiliation: Johns Hopkins University
Country: USA

Publications

  1. ncbi Assessment of distribution and evolution of mechanical dyssynchrony in a porcine model of myocardial infarction by cardiovascular magnetic resonance
    Khaled Z Abd-Elmoniem
    Biomedical and Metabolic Imaging Branch, National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, MD, USA
    J Cardiovasc Magn Reson 14:1. 2012
  2. ncbi Role of cardiovascular magnetic resonance imaging in arrhythmogenic right ventricular dysplasia
    Aditya Jain
    Russell H, Morgan Department of Radiology and Radiological Science, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
    J Cardiovasc Magn Reson 10:32. 2008
  3. ncbi Three dimensional mapping of atrial fibrillation: techniques and necessity
    Hugh Calkins
    The Johns Hopkins Hospital, Baltimore, MD 21287, USA
    J Interv Card Electrophysiol 13:53-9. 2005
  4. ncbi Is pulmonary vein antrum isolation safe and effective in valvular heart disease and open heart surgery?
    Hugh Calkins
    John Hopkins University School of Medicine, Baltimore, MD, USA
    Nat Clin Pract Cardiovasc Med 1:12-3. 2004
  5. ncbi Catheter ablation should not be first-line therapy for atrial fibrillation
    Hugh Calkins
    The Johns Hopkins Hospital, 600 North Wolfe Street, Carnegie 530, Baltimore, MD 21287, USA
    Nat Clin Pract Cardiovasc Med 4:4-5. 2007
  6. ncbi Results of catheter ablation of typical atrial flutter
    Hugh Calkins
    Johns Hopkins Hospital, 600 North Wolfe Street, Baltimore, MD 21287 0409, USA
    Am J Cardiol 94:437-42. 2004
  7. ncbi Prospective randomized comparison of the safety and effectiveness of placement of endocardial pacemaker and defibrillator leads using the extrathoracic subclavian vein guided by contrast venography versus the cephalic approach
    H Calkins
    Department of Medicine, Johns Hopkins University School of Medicine, 600 N Wolfe St, Baltimore, MD 21287, USA
    Pacing Clin Electrophysiol 24:456-64. 2001
  8. ncbi Arrhythmogenic right-ventricular dysplasia/cardiomyopathy
    Hugh Calkins
    Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA
    Curr Opin Cardiol 21:55-63. 2006
  9. ncbi Catheter ablation for cardiac arrhythmias
    H Calkins
    Department of Medicine, Johns Hopkins Hospital, Baltimore, Maryland, USA
    Med Clin North Am 85:473-502, xii. 2001
  10. ncbi Arrhythmogenic right ventricular dysplasia
    Hugh Calkins
    Baltimore, Maryland, USA
    Trans Am Clin Climatol Assoc 119:273-86; discussion 287-8. 2008

Detail Information

Publications94

  1. ncbi Assessment of distribution and evolution of mechanical dyssynchrony in a porcine model of myocardial infarction by cardiovascular magnetic resonance
    Khaled Z Abd-Elmoniem
    Biomedical and Metabolic Imaging Branch, National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, MD, USA
    J Cardiovasc Magn Reson 14:1. 2012
    ..We sought to investigate the relationship between infarct and dyssynchrony post- myocardial infarct (MI), in a porcine model. Mechanical dyssynchrony post-MI is associated with left ventricular (LV) remodeling and increased mortality...
  2. ncbi Role of cardiovascular magnetic resonance imaging in arrhythmogenic right ventricular dysplasia
    Aditya Jain
    Russell H, Morgan Department of Radiology and Radiological Science, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
    J Cardiovasc Magn Reson 10:32. 2008
    ..This article reviews the genetics of ARVD, current status and role of CMR in the diagnosis of ARVD and LV involvement in ARVD...
  3. ncbi Three dimensional mapping of atrial fibrillation: techniques and necessity
    Hugh Calkins
    The Johns Hopkins Hospital, Baltimore, MD 21287, USA
    J Interv Card Electrophysiol 13:53-9. 2005
    ....
  4. ncbi Is pulmonary vein antrum isolation safe and effective in valvular heart disease and open heart surgery?
    Hugh Calkins
    John Hopkins University School of Medicine, Baltimore, MD, USA
    Nat Clin Pract Cardiovasc Med 1:12-3. 2004
  5. ncbi Catheter ablation should not be first-line therapy for atrial fibrillation
    Hugh Calkins
    The Johns Hopkins Hospital, 600 North Wolfe Street, Carnegie 530, Baltimore, MD 21287, USA
    Nat Clin Pract Cardiovasc Med 4:4-5. 2007
  6. ncbi Results of catheter ablation of typical atrial flutter
    Hugh Calkins
    Johns Hopkins Hospital, 600 North Wolfe Street, Baltimore, MD 21287 0409, USA
    Am J Cardiol 94:437-42. 2004
    ..Thus, the results of this study associated catheter ablation of atrial flutter with high acute efficacy, a small risk of recurrent atrial flutter, and an important risk of atrial fibrillation during follow-up...
  7. ncbi Prospective randomized comparison of the safety and effectiveness of placement of endocardial pacemaker and defibrillator leads using the extrathoracic subclavian vein guided by contrast venography versus the cephalic approach
    H Calkins
    Department of Medicine, Johns Hopkins University School of Medicine, 600 N Wolfe St, Baltimore, MD 21287, USA
    Pacing Clin Electrophysiol 24:456-64. 2001
    ..These findings suggest that the contrast-guided approach to the extrathoracic portion of the subclavian vein should be considered as an alternative to the cephalic approach...
  8. ncbi Arrhythmogenic right-ventricular dysplasia/cardiomyopathy
    Hugh Calkins
    Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA
    Curr Opin Cardiol 21:55-63. 2006
    ..The purpose of this article is to review recent developments concerning the diagnosis, genetics, and management of patients with this disease...
  9. ncbi Catheter ablation for cardiac arrhythmias
    H Calkins
    Department of Medicine, Johns Hopkins Hospital, Baltimore, Maryland, USA
    Med Clin North Am 85:473-502, xii. 2001
    ..Catheter ablation is considered as an alternative to pharmacologic therapy in the treatment of these cardiac arrhythmias...
  10. ncbi Arrhythmogenic right ventricular dysplasia
    Hugh Calkins
    Baltimore, Maryland, USA
    Trans Am Clin Climatol Assoc 119:273-86; discussion 287-8. 2008
    ..Independent LV involvement is of rare occurrence. The "accordion sign" is a promising tool for early diagnosis of ARVD. Its diagnostic utility should be confirmed in larger cohorts...
  11. ncbi Treatment of atrial fibrillation with antiarrhythmic drugs or radiofrequency ablation: two systematic literature reviews and meta-analyses
    Hugh Calkins
    Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
    Circ Arrhythm Electrophysiol 2:349-61. 2009
    ....
  12. ncbi Cooled ablation
    Hugh Calkins
    Johns Hopkins University, Baltimore, Maryland, USA
    J Cardiovasc Electrophysiol 15:S12-7. 2004
    ..The experience at Johns Hopkins suggests that cooled radiofrequency ablation has utility in a variety of situations and in some instances has come to be the ablation system of choice...
  13. ncbi Arrhythmogenic right ventricular cardiomyopathy/dysplasia: an update
    Hugh Calkins
    The Johns Hopkins Hospital, 600 North Wolfe Street, Carnegie 530, Baltimore, MD 21287, USA
    Curr Cardiol Rep 10:367-75. 2008
    ..Patients with ARVC/D are encouraged to avoid competitive athletics. Recent advances in the understanding of the genetic basis of ARVC/D have revealed that ARVC/D is a disease of desmosomal dysfunction...
  14. ncbi Catheter ablation of ventricular tachycardia in patients with structural heart disease using cooled radiofrequency energy: results of a prospective multicenter study. Cooled RF Multi Center Investigators Group
    H Calkins
    Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA
    J Am Coll Cardiol 35:1905-14. 2000
    ..The purpose of this multicenter study was to evaluate the safety and efficacy of a radiofrequency (RF) catheter ablation system with internal saline irrigation...
  15. ncbi Resuscitation after prolonged ventricular fibrillation with use of monophasic and biphasic waveform pulses for external defibrillation
    C T Leng
    Division of Cardiology, Department of Medicine, The Johns Hopkins Medical Institutions, Baltimore, MD, USA
    Circulation 101:2968-74. 2000
    ..However, they have not been rigorously tested against monophasic (MP) waveforms in clinical models of external defibrillation, particularly where rescue from prolonged VF is the general rule...
  16. ncbi Laser ablation of the pulmonary veins by using a fiberoptic balloon catheter: implications for treatment of paroxysmal atrial fibrillation
    N M Fried
    Department of Biomedical Engineering, The Johns Hopkins University, Baltimore, Maryland 21205, USA
    Lasers Surg Med 28:197-203. 2001
    ..A new fiberoptic balloon catheter was tested as an alternative to radiofrequency catheter ablation for creation of circumferential thermal lesions at the pulmonary vein orifice...
  17. ncbi Electrical induction of ventricular fibrillation for resuscitation from postcountershock pulseless and asystolic cardiac arrests
    C T Leng
    Division of Cardiology, Department of Medicine, The Johns Hopkins Medical Institutions, The Johns Hopkins University, Baltimore, MD, USA
    Circulation 104:723-8. 2001
    ..It remains unclear, however, whether harmful effects are due primarily to initial countershock of ischemic myocardium or to resultant postdefibrillation rhythms (ie, pulseless electrical activity [PEA] or asystole)...
  18. ncbi Predictors of recurrence following catheter ablation of atrial fibrillation using an irrigated-tip ablation catheter
    Chandrasekhar R Vasamreddy
    Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287-0409, USA
    J Cardiovasc Electrophysiol 15:692-7. 2004
    ..The best results of this procedure are achieved in the subset of patients who are younger than 50 years and have only paroxysmal AF...
  19. ncbi Catheter ablation of accessory pathways, atrioventricular nodal reentrant tachycardia, and the atrioventricular junction: final results of a prospective, multicenter clinical trial. The Atakr Multicenter Investigators Group
    H Calkins
    Johns Hopkins University School of Medicine, Baltimore, MD, USA
    Circulation 99:262-70. 1999
    ..The purpose of this study was to evaluate the safety and efficacy of a temperature-controlled radiofrequency catheter ablation system...
  20. ncbi Misdiagnosis of arrhythmogenic right ventricular dysplasia/cardiomyopathy
    Chandra Bomma
    Department of Cardiology Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
    J Cardiovasc Electrophysiol 15:300-6. 2004
    ..Diagnosis of ARVD/C cannot rely solely upon qualitative features on MRI...
  21. ncbi Atrial volume reduction following catheter ablation of atrial fibrillation and relation to reduction in pulmonary vein size: an evaluation using magnetic resonance angiography
    Vinod K Jayam
    Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287-0409, USA
    J Interv Card Electrophysiol 13:107-14. 2005
    ..CONCLUSIONS: Catheter ablation of AF using a segmental PV isolation approach results in a significant reverse remodeling in the left atrium. Significant stenosis of PVs appears to be rare after the segmental isolation procedure...
  22. ncbi Circumferential ablation with pulmonary vein isolation in permanent atrial fibrillation
    Aamir Cheema
    Department of Medicine, Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
    Am J Cardiol 99:1425-8. 2007
    ..In conclusion, study results suggest that circumferential ablation with PV isolation has moderate efficacy in patients with permanent AF. Efficacy is limited in those in continuous AF for >12 months...
  23. ncbi HRS/EHRA/ECAS expert Consensus Statement on catheter and surgical ablation of atrial fibrillation: recommendations for personnel, policy, procedures and follow-up. A report of the Heart Rhythm Society (HRS) Task Force on catheter and surgical ablation of
    Hugh Calkins
    Johns Hopkins Hospital, Maryland, USA
    Heart Rhythm 4:816-61. 2007
  24. ncbi HRS/EHRA/ECAS expert consensus statement on catheter and surgical ablation of atrial fibrillation: recommendations for personnel, policy, procedures and follow-up. A report of the Heart Rhythm Society (HRS) Task Force on Catheter and Surgical Ablation of
    Hugh Calkins
    Johns Hopkins Hospital, Maryland, USA
    Europace 9:335-79. 2007
  25. ncbi Modern pacemaker and implantable cardioverter/defibrillator systems can be magnetic resonance imaging safe: in vitro and in vivo assessment of safety and function at 1.5 T
    Ariel Roguin
    Department of Medicine, Division of Cardiology, Johns Hopkins Medical Institutions, Baltimore, MD, USA
    Circulation 110:475-82. 2004
    ..CONCLUSIONS: These data suggest that certain modern pacemaker and ICD systems may indeed be MRI safe. This may have major clinical implications for current imaging practices...
  26. ncbi Radiation exposure during catheter ablation of atrial fibrillation
    Lars Lickfett
    Division of Cardiology, The Johns Hopkins Hospital, Baltimore, MD, USA
    Circulation 110:3003-10. 2004
    ..The resulting lifetime risk of fatal malignancy is within the range previously reported for standard supraventricular arrhythmias...
  27. ncbi Arrhythmogenic right ventricular dysplasia: ex vivo and in vivo fat detection with black-blood MR imaging
    Ernesto Castillo
    Russell H. Morgan Dept of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, 600 N. Wolfe Street, MRI-143 Nelson Basement, Baltimore, MD 21287, USA
    Radiology 232:38-48. 2004
    ..When fast SE imaging is applied in vivo, however, breath-holding constraints limit the spatial resolution for RV fat detection...
  28. ncbi Regional differences in systolic and diastolic function in arrhythmogenic right ventricular dysplasia/cardiomyopathy using magnetic resonance imaging
    Chandra Bomma
    Division of Cardiology (Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA
    Am J Cardiol 95:1507-11. 2005
    ..In this study, we report results of quantitative evaluation of biventricular global and regional function using peak ejection rate and peak filling rate as measures of systolic and diastolic function, respectively (volumetric method)...
  29. ncbi Real-time cardiac catheter navigation on three-dimensional CT images
    Stephen B Solomon
    Department of Radiology, Johns Hopkins School of Medicine, Baltimore, MD, USA
    J Interv Card Electrophysiol 8:27-36. 2003
    ..Because fluoroscopy provides only limited information about the relationship between catheter positions and cardiac structures, and is associated with radiation risk, other approaches to mapping may be beneficial...
  30. ncbi Incidence and predictors of left atrial thrombus prior to catheter ablation of atrial fibrillation
    Daniel Scherr
    Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21224, USA
    J Cardiovasc Electrophysiol 20:379-84. 2009
    ..However, the incidence and predictors of LA thrombus detected with TEE have not been systematically examined in this setting...
  31. ncbi Comprehensive desmosome mutation analysis in north americans with arrhythmogenic right ventricular dysplasia/cardiomyopathy
    A Dénise den Haan
    Department of Medicine Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
    Circ Cardiovasc Genet 2:428-35. 2009
    ..We report comprehensive desmosome genetic analysis for 100 North Americans with clinically confirmed or suspected ARVD/C...
  32. ncbi State-of-the-art and emerging technologies for atrial fibrillation ablation
    Jane Dewire
    Department of Medicine, Division of Cardiology, Johns Hopkins University School of Medicine, The Johns Hopkins Hospital, Carnegie 530, 600 North Wolfe Street, Baltimore, MD 21287, USA
    Nat Rev Cardiol 7:129-38. 2010
    ..However, technological advances are sure to result in the necessary improvements in the safety and efficacy of AF ablation procedures...
  33. ncbi Safety and efficacy of circumferential pulmonary vein catheter ablation of atrial fibrillation
    Chandrasekhar R Vasamreddy
    Department of Medicine, Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA
    Heart Rhythm 2:42-8. 2005
    ....
  34. ncbi Tissue magnesium levels and the arrhythmic substrate in humans
    M C Haigney
    Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814, USA
    J Cardiovasc Electrophysiol 8:980-6. 1997
    ..Magnesium deficiency has been implicated in the pathogenesis of sudden death, but the investigation of arrhythmic mechanisms has been hindered by difficulties in measuring cellular tissue magnesium stores...
  35. ncbi Catheter ablation for cardiac arrhythmias
    L Lickfett
    Johns Hopkins Hospital, Baltimore, Maryland, USA
    Minerva Cardioangiol 50:189-207. 2002
    ..In this article we will review the current state of knowledge about the technique, indications, and results of catheter ablation for the treatment of cardiac arrhythmias...
  36. ncbi Lead configuration for defibrillator implantation in a patient with congenital heart disease and a mechanical prosthetic tricuspid valve
    C T Leng
    Department of Medicine, The Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
    Pacing Clin Electrophysiol 24:1291-2. 2001
    ..Their lead configuration deviates substantially from existing designs in its primary use of a coronary sinus defibrillation coil and a left-sided subcutaneous array to distribute current across the ventricular myocardium...
  37. ncbi Linear lesions in myocardium created by Nd:YAG laser using diffusing optical fibers: in vitro and in vivo results
    N M Fried
    Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21205, USA
    Lasers Surg Med 27:295-304. 2000
    ..This study uses laser energy delivered through diffusing optical fibers as an alternative to radiofrequency energy for the creation of linear lesions in cardiac tissue in a single application...
  38. ncbi A conservative approach to performing transseptal punctures without the use of intracardiac echocardiography: stepwise approach with real-time video clips
    Alan Cheng
    Department of Medicine, Division of Cardiology, Section for Cardiac Electrophysiology, The Johns Hopkins Hospital, Baltimore, Maryland, USA
    J Cardiovasc Electrophysiol 18:686-9. 2007
    ..Utilizing a series of real-time video clips, we describe our technique of double transseptal puncture and illustrate in detail ways in which to avoid common pitfalls...
  39. ncbi Feasibility of endoscopic guidance for nonsurgical transthoracic atrial and ventricular epicardial ablation
    Saman Nazarian
    Department of Medicine, Division of Cardiology, Johns Hopkins Hospital, Baltimore, Maryland 21287, USA
    Heart Rhythm 5:1115-9. 2008
    ..The safety, efficacy, and applicability of epicardial catheter ablation likely will improve with direct visualization of the pericardial space...
  40. ncbi Normal reference values for the adult right ventricle by magnetic resonance imaging
    Harikrishna Tandri
    Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
    Am J Cardiol 98:1660-4. 2006
    ..These values will be useful to differentiate RV health from diseases that result in abnormal RV structure and function...
  41. ncbi Risk stratification in postmyocardial infarction patients: Is there reason to hope?
    Hugh Calkins
    Department of Medicine, Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
    Heart Rhythm 2:365-6. 2005
  42. ncbi Long-term follow-up of fast pathway radiofrequency ablation in atrioventricular nodal reentrant tachycardia
    Lars Lickfett
    Division of Cardiology, Johns Hopkins Hospital, Baltimore, Maryland 21287, USA
    Am J Cardiol 89:1124-5. 2002
  43. ncbi Prolonged RV endocardial activation duration: a novel marker of arrhythmogenic right ventricular dysplasia/cardiomyopathy
    Harikrishna Tandri
    Division of Cardiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
    Heart Rhythm 6:769-75. 2009
    ..Parietal block, defined as intra right ventricular (RV) conduction slowing, is a major diagnostic criterion for arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C)...
  44. ncbi Desmosomal dysfunction due to mutations in desmoplakin causes arrhythmogenic right ventricular dysplasia/cardiomyopathy
    Zhao Yang
    Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA
    Circ Res 99:646-55. 2006
    ..These data suggest DSP expression in cardiomyocytes is crucial for maintaining cardiac tissue integrity, and DSP abnormalities result in ARVD/C by cardiomyocyte death, changes in lipid metabolism, and defects in cardiac development...
  45. ncbi Characterization of acute and subacute radiofrequency ablation lesions with nonenhanced magnetic resonance imaging
    Timm Dickfeld
    Division of Cardiology, Johns Hopkins School of Medicine, Baltimore, Maryland 21201, USA
    Heart Rhythm 4:208-14. 2007
    ..However, MRI patterns after RF ablation have not been well investigated...
  46. ncbi Effects of surgical and endoscopic electrocautery on modern-day permanent pacemaker and implantable cardioverter-defibrillator systems
    Alan Cheng
    Section for Cardiac Electrophysiology, Division of Cardiovascular Diseases, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA
    Pacing Clin Electrophysiol 31:344-50. 2008
    ..The ability of newer devices to withstand system malfunction or failure during surgery/endoscopy remains unknown...
  47. ncbi Evidence for electrical remodeling of the native conduction system with cardiac resynchronization therapy
    Charles A Henrikson
    Division of Cardiology, Johns Hopkins University, Baltimore, Maryland 21205, USA
    Pacing Clin Electrophysiol 30:591-5. 2007
    ..Cardiac resynchronization therapy (CRT) improves hemodynamics and decreases heart failure symptoms. However, the potential of CRT to bring about electrical remodeling of the heart has not been investigated...
  48. ncbi Magnetic resonance imaging findings in patients meeting task force criteria for arrhythmogenic right ventricular dysplasia
    Harikrishna Tandri
    Division of Cardiology, The Johns Hopkins University, Baltimore, Maryland, USA
    J Cardiovasc Electrophysiol 14:476-82. 2003
    ..Trabecular disarray is seen more frequently than wall thinning and aneurysms. RV dimensions and volumes differ significantly in ARVD compared to controls, indicating a role for quantitative evaluation in the diagnosis of ARVD...
  49. ncbi Cardiac resynchronization and death from progressive heart failure: a meta-analysis of randomized controlled trials
    David J Bradley
    Division of Cardiology, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA
    JAMA 289:730-40. 2003
    ..Cardiac resynchronization, a pacemaker-based therapy for heart failure, enhances cardiac performance and quality of life, but its effect on mortality is uncertain...
  50. ncbi Automated detection and characterization of complex fractionated atrial electrograms in human left atrium during atrial fibrillation
    Daniel Scherr
    Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
    Heart Rhythm 4:1013-20. 2007
    ..Complex fractionated atrial electrograms (CFAEs) have been reported as ablative targets for the treatment of atrial fibrillation (AF). However, the process of CFAE identification is highly dependent on the operator's judgment...
  51. ncbi Long-term efficacy of catheter ablation of ventricular tachycardia in patients with arrhythmogenic right ventricular dysplasia/cardiomyopathy
    Darshan Dalal
    Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
    J Am Coll Cardiol 50:432-40. 2007
    ..Particular focus was placed on defining the single-procedure efficacy over long-term follow-up...
  52. ncbi Feasibility of real-time magnetic resonance imaging for catheter guidance in electrophysiology studies
    Saman Nazarian
    Department of Medicine, Division of Cardiology, Johns Hopkins Hospital, Carnegie 592C, 600 N Wolfe St, Baltimore, MD 21287, USA
    Circulation 118:223-9. 2008
    ..In this study, we sought to test the feasibility of performing electrophysiology studies with real-time MRI guidance...
  53. ncbi Impact of heart rhythm status on registration accuracy of the left atrium for catheter ablation of atrial fibrillation
    Jun Dong
    Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
    J Cardiovasc Electrophysiol 18:1269-76. 2007
    ..However, the impact of the heart rhythm change on the accuracy of left atrium (LA) registration has not been studied...
  54. ncbi Initial experience in the use of integrated electroanatomic mapping with three-dimensional MR/CT images to guide catheter ablation of atrial fibrillation
    Jun Dong
    Department of Medicine, John Hopkins University School of Medicine, Baltimore, MD 21287 0409, USA
    J Cardiovasc Electrophysiol 17:459-66. 2006
    ..No prior studies have reported the use of integrated electroanatomic mapping with preacquired magnetic resonance/computed tomographic (MR/CT) images to guide catheter ablation of atrial fibrillation (AF) in a series of patients...
  55. ncbi Use of a coronary sinus lead and biventricular ICD to correct a sensing abnormality in a patient with arrhythmogenic right ventricular dysplasia/cardiomyopathy
    Kenneth C Bilchick
    Division of Cardiology, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
    J Cardiovasc Electrophysiol 17:317-20. 2006
    ..We discuss how the use of a bipolar coronary sinus lead and a biventricular ICD generator with a novel header configuration solved the problem...
  56. ncbi Anatomic stereotactic catheter ablation on three-dimensional magnetic resonance images in real time
    Timm Dickfeld
    Division of Cardiology, Johns Hopkins School of Medicine, Baltimore, MD, USA
    Circulation 108:2407-13. 2003
    ..Because fluoroscopy provides only limited information about the relationship between catheter positions and cardiac structures and is associated with radiation risk, other approaches to mapping may be beneficial...
  57. ncbi Unusual presentation of cardiac sarcoidosis
    Harikrishna Tandri
    Division of Cardiology, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
    Congest Heart Fail 13:116-8. 2007
    ..This case illustrates the importance of complete testing, including invasive studies such as endomyocardial biopsy, in patients presenting with life-threatening ventricular arrhythmias to establish a correct diagnosis...
  58. ncbi One method to reduce heart block risk during catheter ablation of atrioventricular nodal reentrant tachycardia
    Glenn R Meininger
    Department of Medicine, Division of Cardiology, The Johns Hopkins Hospital, Baltimore, Maryland 21287-6568, USA
    J Cardiovasc Electrophysiol 15:727-8. 2004
  59. ncbi Changes of pulmonary vein orifice size and location throughout the cardiac cycle: dynamic analysis using magnetic resonance cine imaging
    Lars Lickfett
    Division of Cardiology, The John Hopkins University, Baltimore, Maryland, USA
    J Cardiovasc Electrophysiol 16:582-8. 2005
    ..The aim of the current study was therefore to analyze changes of PV orifice size and location throughout the cardiac cycle using cine magnetic resonance imaging (MRI)...
  60. ncbi Beat-to-beat three-dimensional ECG variability predicts ventricular arrhythmia in ICD recipients
    Larisa G Tereshchenko
    Division of Cardiology, Department of Medicine, Johns Hopkins Hospital, Baltimore, Maryland, USA
    Heart Rhythm 7:1606-13. 2010
    ..Methodological difficulties associated with QT measurements prompt the search for new electrocardiographic markers of repolarization heterogeneity...
  61. ncbi Stereotactic catheter navigation using magnetic resonance image integration in the human heart
    Timm Dickfeld
    Division of Cardiology, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
    Heart Rhythm 2:413-5. 2005
  62. ncbi A new electrocardiogram marker to identify patients at low risk for ventricular tachyarrhythmias: sum magnitude of the absolute QRST integral
    Larisa G Tereshchenko
    The Division of Cardiology, Department of Medicine, Johns Hopkins Hospital, Baltimore, MD, USA
    J Electrocardiol 44:208-16. 2011
    ..We proposed and tested a novel electrocardiogram marker of risk of ventricular arrhythmias (VAs)...
  63. ncbi Noninvasive detection of myocardial fibrosis in arrhythmogenic right ventricular cardiomyopathy using delayed-enhancement magnetic resonance imaging
    Harikrishna Tandri
    Division of Cardiology, The Johns Hopkins University, Baltimore, MD 21287, USA
    J Am Coll Cardiol 45:98-103. 2005
    ....
  64. ncbi Catheter ablation of atrial fibrillation guided by registered computed tomographic image of the atrium
    Jun Dong
    Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA
    Heart Rhythm 2:1021-2. 2005
  65. ncbi Evaluation and course of an unusual case of arrhythmogenic right ventricular dysplasia
    Jan Fritz
    Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
    Int J Cardiovasc Imaging 22:269-73. 2006
    ..In this report, we describe accurate evaluation by MR imaging confirmed by histopathologic findings as well as imaging progression of this unusual case of arrhythmogenic right ventricular dysplasia...
  66. ncbi QRS prolongation in myotonic muscular dystrophy and diffuse fibrosis on cardiac magnetic resonance
    Saman Nazarian
    Department of Medicine Cardiology, Johns Hopkins University, Baltimore, Maryland 21287, USA
    Magn Reson Med 64:107-14. 2010
    ..The SNRV of the left ventricle is associated with QRS prolongation, likely due to late depolarization of tissue within islands of patchy fibrosis. The association of SNRV with future clinical events warrants further study...
  67. ncbi The benefit of upgrading chronically right ventricle-paced heart failure patients to resynchronization therapy demonstrated by strain rate imaging
    Zayd A Eldadah
    Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
    Heart Rhythm 3:435-42. 2006
    ..RV pacing induces conduction delay (CD), mechanical dyssynchrony, and increased morbidity in patients with HF. CRT improves HF symptoms and survival, but sparse data exist on its direct effect on chronically RV-paced HF patients...
  68. ncbi Clinical features of arrhythmogenic right ventricular dysplasia/cardiomyopathy associated with mutations in plakophilin-2
    Darshan Dalal
    Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
    Circulation 113:1641-9. 2006
    ..The purpose of our study was to validate the frequency of PKP2 mutations in another large series of ARVD/C patients and to examine the phenotypic characteristics associated with PKP2 mutations...
  69. ncbi Feasibility and variability of three dimensional echocardiography in arrhythmogenic right ventricular dysplasia/cardiomyopathy
    Kalpana R Prakasa
    Division of Cardiology, Johns Hopkins University, Baltimore, Maryland, USA
    Am J Cardiol 97:703-9. 2006
    ..In conclusion, 3DE measurements of RV volumes and ejection fractions closely correlate with CMR values and may be useful in the follow-up of patients with ARVD/C...
  70. ncbi Integrated electroanatomic mapping with three-dimensional computed tomographic images for real-time guided ablations
    Jun Dong
    Johns Hopkins University School of Medicine, Baltimore, MD, USA
    Circulation 113:186-94. 2006
    ..This may provide significant advantages for anatomically based procedures such as ablation of atrial fibrillation and nonidiopathic ventricular tachycardia...
  71. ncbi Characterization of radiofrequency ablation lesions with gadolinium-enhanced cardiovascular magnetic resonance imaging
    Timm Dickfeld
    Division of Cardiology, Department of Radiology, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
    J Am Coll Cardiol 47:370-8. 2006
    ..This study was designed to evaluate the characteristics of gadolinium-enhanced imaging of radiofrequency ablations...
  72. ncbi Ibutilide-induced changes in the temporal lability of ventricular repolarization in patients with and without structural heart disease
    Alan Cheng
    Section for Cardiac Electrophysiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
    J Cardiovasc Electrophysiol 20:873-9. 2009
    ..We sought to define the effects of ibutilide on the temporal lability of ventricular repolarization in patients with and without structural heart disease...
  73. ncbi Prevalence of left ventricular regional dysfunction in arrhythmogenic right ventricular dysplasia: a tagged MRI study
    Aditya Jain
    Department of Radiology, Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
    Circ Cardiovasc Imaging 3:290-7. 2010
    ..Regional left ventricular (LV) function has not been systematically studied in ARVD...
  74. ncbi Magnetic resonance assessment of the substrate for inducible ventricular tachycardia in nonischemic cardiomyopathy
    Saman Nazarian
    Department of Medicine Cardiology, Johns Hopkins Hospital, Baltimore, MD 21287, USA
    Circulation 112:2821-5. 2005
    ..However, the substrate for ventricular arrhythmia in patients with nonischemic cardiomyopathy remains poorly understood. We hypothesized that the distribution of scar identified by MRI is predictive of inducible ventricular tachycardia...
  75. ncbi Morphologic variants of familial arrhythmogenic right ventricular dysplasia/cardiomyopathy a genetics-magnetic resonance imaging correlation study
    Darshan Dalal
    Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
    J Am Coll Cardiol 53:1289-99. 2009
    ....
  76. ncbi Ventricular pacing with premature excitation for treatment of hypertensive-cardiac hypertrophy with cavity-obliteration
    D A Kass
    Division of Cardiology, Department of Medicine, The Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
    Circulation 100:807-12. 1999
    ..Accordingly, we hypothesized that pacing may improve exercise tolerance long-term in this syndrome...
  77. ncbi Beat-to-beat QT interval variability: novel evidence for repolarization lability in ischemic and nonischemic dilated cardiomyopathy
    R D Berger
    Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
    Circulation 96:1557-65. 1997
    ..We sought to test the hypothesis that beat-to-beat QT interval variability is increased in DCM patients compared with control subjects...
  78. ncbi Cost-effectiveness of catheter ablation in patients with ventricular tachycardia
    H Calkins
    Johns Hopkins University, Baltimore, MD, USA
    Circulation 101:280-8. 2000
    ..The analysis used a societal perspective for a hypothetical cohort of VT patients with implantable cardioverter-defibrillators, who were experiencing frequent shocks...
  79. ncbi Sex differences in outcome after implantable cardioverter defibrillator implantation in nonischemic cardiomyopathy
    Christine M Albert
    Center for Arrhythmia Prevention, Department of Medicine, Brigham and Women s Hospital, Boston, MA 02215 1204, USA
    Am Heart J 156:367-72. 2008
    ..In the Defibrillators in Non-Ischemic Cardiomyopathy Treatment Evaluation (DEFINITE) trial, a reduction in all-cause mortality was seen in men (P = .018) but not for women (P = .76)...
  80. ncbi Interaction between neuronal nitric oxide synthase and inhibitory G protein activity in heart rate regulation in conscious mice
    P Jumrussirikul
    Department of Medicine, Department of Neurology, Department of Neuroscience, Department of Physiology, and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21287, USA
    J Clin Invest 102:1279-85. 1998
    ..Thus, neuronally derived NO and cardiac inhibitory G protein activity serve as parallel pathways to mediate autonomic slowing of heart rate in the mouse...
  81. ncbi ACC/AHA/ESC guidelines for the management of patients with supraventricular arrhythmias--executive summary: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology
    Carina Blomstrom-Lundqvist
    Circulation 108:1871-909. 2003
  82. ncbi ACC/AHA/ESC guidelines for the management of patients with supraventricular arrhythmias--executive summary. a report of the American college of cardiology/American heart association task force on practice guidelines and the European society of cardiology
    Carina Blomstrom-Lundqvist
    J Am Coll Cardiol 42:1493-531. 2003
  83. ncbi Hybrid therapy with right atrial catheter ablation and previously ineffective antiarrhythmic drugs for the management of atrial fibrillation
    Abraham G Kocheril
    Section of Cardiac Electrophysiology, Carle Heart Center and University of Illinois, Urbana, 61801, USA
    J Interv Card Electrophysiol 12:189-97. 2005
    ..Early studies suggested that linear catheter ablation in the right atrium may provide sufficient substrate modification to reestablish therapeutic efficacy of previously ineffective AADs...
  84. ncbi Stereotactic magnetic resonance guidance for anatomically targeted ablations of the fossa ovalis and the left atrium
    Timm Dickfeld
    Division of Cardiology, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
    J Interv Card Electrophysiol 11:105-15. 2004
    ....
  85. ncbi Technique and results of pulmonary vein angiography in patients undergoing catheter ablation of atrial fibrillation
    Chandreaekhar R Vasamreddy
    Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
    J Cardiovasc Electrophysiol 15:21-6. 2004
    ..PV angiography can be used as an alternate to MRI or computed tomographic imaging, particularly when these tests are unavailable or are contraindicated in the patient...
  86. ncbi Worldwide survey on the methods, efficacy, and safety of catheter ablation for human atrial fibrillation
    Riccardo Cappato
    Arrhythmia and Electrophysiology Center, Policlinico San Donato, Via Morandi 30, 20097 San Donato Milanese, Milan, Italy
    Circulation 111:1100-5. 2005
    ..The purpose of this study was to conduct a worldwide survey investigating the methods, efficacy, and safety of catheter ablation (CA) of atrial fibrillation (AF)...
  87. ncbi Clinical utility and safety of a protocol for noncardiac and cardiac magnetic resonance imaging of patients with permanent pacemakers and implantable-cardioverter defibrillators at 1.5 tesla
    Saman Nazarian
    Department of Cardiology, Johns Hopkins Hospital, Carnegie 568, 600 N Wolfe St, Baltimore, MD 21287, USA
    Circulation 114:1277-84. 2006
    ..We sought to evaluate the diagnostic utility and safety of noncardiac and cardiac MRI at 1.5T using a protocol that incorporates device selection and programming and limits the estimated specific absorption rate of MRI sequences...
  88. ncbi Prevention of esophageal injury during catheter ablation of atrial fibrillation: is intracardiac echocardiography the answer?
    Hugh Calkins
    Heart Rhythm 3:1162-3. 2006
  89. ncbi Long-term single procedure efficacy of catheter ablation of atrial fibrillation
    Aamir Cheema
    Department of Medicine, Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
    J Interv Card Electrophysiol 15:145-55. 2006
    ..In order to be able to compare outcomes of various techniques in differing patient populations, we urge investigators to report long-term single procedure outcomes...
  90. ncbi Controversial role of magnetic resonance imaging in the diagnosis of arrhythmogenic right ventricular dysplasia
    Harikrishna Tandri
    Am J Cardiol 92:649. 2003
  91. ncbi Incidence and time course of early recovery of pulmonary vein conduction after catheter ablation of atrial fibrillation
    Aamir Cheema
    Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287 0409, USA
    J Cardiovasc Electrophysiol 18:387-91. 2007
    ..Although it is well recognized that recovery of pulmonary vein (PV) conduction is common among patients who fail atrial fibrillation (AF) ablation, little is known about the precise time course of recurrence...
  92. ncbi Long-term safety and efficacy of circumferential ablation with pulmonary vein isolation
    Aamir Cheema
    Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287-0409, USA
    J Cardiovasc Electrophysiol 17:1080-5. 2006
    ..Repeat procedures involving re-isolation of the PVs result in a significant improvement in outcomes. Complete electrical isolation of the PVs has a significant impact on the long-term efficacy of the procedure...
  93. ncbi Driving and implantable cardioverter-defibrillator shocks for ventricular arrhythmias: results from the TOVA study
    Christine M Albert
    Center for Arrhythmia Prevention, Division of Preventive Medicine and Cardiovascular Division, Brigham and Women s Hospital, Boston, Massachusetts 02215 1204, USA
    J Am Coll Cardiol 50:2233-40. 2007
    ..This study examined the risk of implantable cardioverter-defibrillator (ICD) shocks for ventricular tachycardia (VT) or ventricular fibrillation (VF) associated with driving...
  94. ncbi Role of magnetic resonance imaging in arrhythmogenic right ventricular dysplasia: insights from the North American arrhythmogenic right ventricular dysplasia (ARVD/C) study
    Harikrishna Tandri
    Department of Cardiology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
    Am Heart J 155:147-53. 2008
    ..The aim of our study was to define the prevalence, sensitivity, and specificity of quantitative MR imaging findings in the probands of multidisciplinary study of right ventricular dysplasia...