Kazutaka Aonuma

Summary

Affiliation: Osaka City University
Country: Japan

Publications

  1. doi request reprint The prognostic value of early repolarization (J wave) and ST-segment morphology after J wave in Brugada syndrome: multicenter study in Japan
    Masahiko Takagi
    Department of Internal Medicine and Cardiology, Graduate School of Medicine, Osaka City University, Osaka, Japan
    Heart Rhythm 10:533-9. 2013
  2. ncbi request reprint Clinical characteristics and risk stratification in symptomatic and asymptomatic patients with brugada syndrome: multicenter study in Japan
    Masahiko Takagi
    Department of Internal Medicine and Cardiology, Osaka City University Graduate School of Medicine, Osaka, Japan
    J Cardiovasc Electrophysiol 18:1244-51. 2007
  3. ncbi request reprint Utility of right precordial leads at higher intercostal space positions to diagnose Brugada syndrome
    Masahiko Takagi
    Department of Internal Medicine and Cardiology, Osaka City University Graduate School of Medicine, Osaka, Japan
    Pacing Clin Electrophysiol 25:241-2. 2002
  4. pmc Acute improvement of atrial mechanical stunning after electrical cardioversion of persistent atrial fibrillation: comparison between biatrial and single atrial pacing
    M Takagi
    Department of Internal Medicine and Cardiology, Osaka City University Graduate School of Medicine, 1 4 3 Asahimachi, Abeno Ku, Osaka 5458585, Japan
    Heart 91:58-63. 2005
  5. pmc The "pop phenomenon" detected by phased array intracardiac echocardiography
    M Takagi
    Heart 89:706. 2003
  6. ncbi request reprint Pilsicanide-induced marked T wave alternans and ventricular fibrillation in a patient with Brugada syndrome
    Masahiko Takagi
    Department of Internal Medicine and Cardiology, Graduate School of Medicine, Osaka City University, Osaka, Japan
    J Cardiovasc Electrophysiol 13:837. 2002
  7. pmc Histological gap between ablation lesions detected by phased array intracardiac echocardiography
    M Takagi
    Heart 87:567. 2002
  8. ncbi request reprint Enhancement of J-ST-segment elevation by the glucose and insulin test in Brugada syndrome
    Akihiko Nogami
    Div of Cardiology, Yokohama Rosai Hospital, 3211 Kozukue, Kohoku, Yokohama, Kanagawa 222 0036, Japan
    Pacing Clin Electrophysiol 26:332-7. 2003
  9. ncbi request reprint Atrial tachycardia originating from the upper left atrial septum: demonstration of transseptal interatrial conduction using the infolded atrial walls
    Koji Kumagai
    Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
    J Cardiovasc Electrophysiol 17:907-11. 2006
  10. ncbi request reprint Ventricular tachycardia originating from the epicardium identified by intracoronary mapping using a PTCA guidewire
    Koji Kumagai
    Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Machi, Sendai, Japan
    J Cardiovasc Electrophysiol 17:670-3. 2006

Collaborators

Detail Information

Publications40

  1. doi request reprint The prognostic value of early repolarization (J wave) and ST-segment morphology after J wave in Brugada syndrome: multicenter study in Japan
    Masahiko Takagi
    Department of Internal Medicine and Cardiology, Graduate School of Medicine, Osaka City University, Osaka, Japan
    Heart Rhythm 10:533-9. 2013
    ..The prognostic value of a J wave and ST-segment morphology after J wave in inferolateral leads in Brugada syndrome (BS) is still unknown...
  2. ncbi request reprint Clinical characteristics and risk stratification in symptomatic and asymptomatic patients with brugada syndrome: multicenter study in Japan
    Masahiko Takagi
    Department of Internal Medicine and Cardiology, Osaka City University Graduate School of Medicine, Osaka, Japan
    J Cardiovasc Electrophysiol 18:1244-51. 2007
    ..We compared the clinical and ECG characteristics of symptomatic and asymptomatic patients with Brugada syndrome to identify new markers for high-risk patients...
  3. ncbi request reprint Utility of right precordial leads at higher intercostal space positions to diagnose Brugada syndrome
    Masahiko Takagi
    Department of Internal Medicine and Cardiology, Osaka City University Graduate School of Medicine, Osaka, Japan
    Pacing Clin Electrophysiol 25:241-2. 2002
    ..Only these right precordial leads at higher intercostal space positions were useful to identify Brugada syndrome in this case...
  4. pmc Acute improvement of atrial mechanical stunning after electrical cardioversion of persistent atrial fibrillation: comparison between biatrial and single atrial pacing
    M Takagi
    Department of Internal Medicine and Cardiology, Osaka City University Graduate School of Medicine, 1 4 3 Asahimachi, Abeno Ku, Osaka 5458585, Japan
    Heart 91:58-63. 2005
    ..To evaluate the acute effects of atrial pacing at different pacing sites on mechanical stunning after cardioversion of atrial fibrillation (AF)...
  5. pmc The "pop phenomenon" detected by phased array intracardiac echocardiography
    M Takagi
    Heart 89:706. 2003
  6. ncbi request reprint Pilsicanide-induced marked T wave alternans and ventricular fibrillation in a patient with Brugada syndrome
    Masahiko Takagi
    Department of Internal Medicine and Cardiology, Graduate School of Medicine, Osaka City University, Osaka, Japan
    J Cardiovasc Electrophysiol 13:837. 2002
  7. pmc Histological gap between ablation lesions detected by phased array intracardiac echocardiography
    M Takagi
    Heart 87:567. 2002
  8. ncbi request reprint Enhancement of J-ST-segment elevation by the glucose and insulin test in Brugada syndrome
    Akihiko Nogami
    Div of Cardiology, Yokohama Rosai Hospital, 3211 Kozukue, Kohoku, Yokohama, Kanagawa 222 0036, Japan
    Pacing Clin Electrophysiol 26:332-7. 2003
    ..Blood glucose and insulin concentrations may be factors modulating the circadian or day-to-day ECG variations in this syndrome...
  9. ncbi request reprint Atrial tachycardia originating from the upper left atrial septum: demonstration of transseptal interatrial conduction using the infolded atrial walls
    Koji Kumagai
    Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
    J Cardiovasc Electrophysiol 17:907-11. 2006
    ..A single radiofrequency application targeting the upper left atrial septum successfully abolished the AT...
  10. ncbi request reprint Ventricular tachycardia originating from the epicardium identified by intracoronary mapping using a PTCA guidewire
    Koji Kumagai
    Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Machi, Sendai, Japan
    J Cardiovasc Electrophysiol 17:670-3. 2006
    ..No VT was clinically observed during a follow up period of 14 months...
  11. ncbi request reprint In vivo electropharmacological effects of amiodarone and candesartan on atria of chronic atrioventricular block dogs
    Kai Wang
    Department of Pharmacology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Yamanashi 409 3898, Japan
    J Pharmacol Sci 103:207-13. 2007
    ....
  12. ncbi request reprint Atrial unipolar potential in radiofrequency catheter ablation of atrial tachycardia
    Yohkoh Soejima
    Department of Cardiology, International Medical Center of Japan, Tokyo
    Int Heart J 48:313-22. 2007
    ..In SART, the ablation success was often achieved by multiple, linear RF delivery near perinodal tissue, and the QS pattern could be a candidate for the optimum target site...
  13. ncbi request reprint Effect of triangle ventricular pacing on haemodynamics and dyssynchrony in patients with advanced heart failure: a comparison study with conventional bi-ventricular pacing therapy
    Kentaro Yoshida
    Cardiovascular Division, Institute of Clinical Medicine, University of Tsukuba, 1 1 1 Tennodai, Tsukuba, Ibaraki 305 8575, Japan
    Eur Heart J 28:2610-9. 2007
    ..This study examined the impact of cardiac resynchronization therapy (CRT) by triangle ventricular pacing (Tri-V) on left ventricular (LV) function and dyssynchrony...
  14. doi request reprint Electrocardiographic characteristics of the variants of idiopathic left ventricular outflow tract ventricular tachyarrhythmias
    Koji Kumagai
    Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
    J Cardiovasc Electrophysiol 19:495-501. 2008
    ..However, the electrocardiographic characteristics of those variants previously have not been evaluated fully...
  15. doi request reprint Association of sleep-disordered breathing and ventricular arrhythmias in patients without heart failure
    Yuki Koshino
    Department of Cardiology, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan
    Am J Cardiol 101:882-6. 2008
    ..0 +/- 12.8 vs 50.6 +/- 12.7 years, body mass index 26.3 +/- 4.0 vs 21.2 +/- 2.0 kg/m2). In conclusion, this study found a high prevalence of SDB in patients with ventricular arrhythmias and normal LV function...
  16. ncbi request reprint Effect of left atrial ablation on the quality of life in patients with atrial fibrillation
    Shinsuke Miyazaki
    Cardiovascular Center, Yokosuka Kyosai Hospital, 1 16 Yonegahamadori, Yokosuka 238 8558, Japan
    Circ J 72:582-7. 2008
    ..The current study aimed to investigate the effect of ablation therapy on the quality of life (QOL) in patients with atrial fibrillation (AF) by using a questionnaire specific for AF...
  17. ncbi request reprint Feasibility of targeting catheter ablation to the markedly low-voltage area surrounding infarct scars in patients with post-infarction ventricular tachycardia
    Kentaro Yoshida
    Cardiovascular Division, University of Tsukuba, 1 1 1 Tennodai, Tsukuba 305 8575, Japan
    Circ J 72:1112-9. 2008
    ..5 mV. However, that is usually too large for catheter ablation in post-infarction ventricular tachycardia (VT) and the use of strict voltage criteria may produce better outcomes...
  18. ncbi request reprint How to diagnose, locate, and ablate coronary cusp ventricular tachycardia
    Hitoshi Hachiya
    Cardiology Department, Yokosuka Kyosai General Hospital, Kanagawa, Japan
    J Cardiovasc Electrophysiol 13:551-6. 2002
    ..We established the characteristics and technique of catheter ablation from both the left and right coronary cusps to cure left ventricular outflow tract ventricular tachycardia...
  19. ncbi request reprint Japanese randomized trial for investigation of a combined therapy of amiodarone and implantable cardioverter defibrillator in patients with ventricular tachycardia and fibrillation: the Nippon ICD Plus Pharmachologic Option Necessity study design
    Takashi Kurita
    Department of Cardiovascular Medicine, National Cardiovascular Center, Suita, Japan
    Circ J 70:316-20. 2006
    ....
  20. ncbi request reprint Electrocardiographic and electrophysiologic characteristics of ventricular tachycardia originating within the pulmonary artery
    Yukio Sekiguchi
    Cardiovascular Center, Yokosuka Kyosai General Hospital, Kanagawa, Japan
    J Am Coll Cardiol 45:887-95. 2005
    ..We investigated the electrocardiographic (ECG) and electrophysiologic characteristics of ventricular tachycardia (VT) originating within the pulmonary artery (PA)...
  21. ncbi request reprint Permanent His-bundle pacing after atrioventricular node ablation in a patient with chronic atrial fibrillation and mitral regurgitation
    Yasuteru Yamauchi
    Cardiology Department, Musashino Red Cross Hospital, Tokyo 180 8610, Japan
    Circ J 69:510-4. 2005
    ....
  22. ncbi request reprint Ventricular unipolar potential in radiofrequency catheter ablation of idiopathic non-reentrant ventricular outflow tachycardia
    Yohkoh Soejima
    Department of Cardiology, Ohme Municipal General Hospital, Tokyo 198 0042, Japan
    Jpn Heart J 45:749-60. 2004
    ..0 and 0.89 in RVOVT and 0.86 and 0.83 in LVOVT, respectively. In the ablation of idio-VT, QS-pattern V-uni is simply and visually identifiable, is very useful, and should be given a high priority when determining the optimum target site...
  23. ncbi request reprint Idiopathic left ventricular tachycardia originating from the mitral annulus
    Koji Kumagai
    Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
    J Cardiovasc Electrophysiol 16:1029-36. 2005
    ..Here, we describe the electrophysiological (EP) findings of a new variant of RMVT originating from the mitral annulus (MAVT)...
  24. ncbi request reprint Electrocardiographic characteristics of repetitive monomorphic right ventricular tachycardia originating near the His-bundle
    Yasuteru Yamauchi
    Division of Cardiology, Musashino Red Cross Hospital, Tokyo, Japan
    J Cardiovasc Electrophysiol 16:1041-8. 2005
    ..The aim of this study was to investigate ECG characteristics of VT/VPCs originating near the His-bundle in comparison with right ventricular outflow tract (RVOT)-VT/VPCs...
  25. ncbi request reprint Chronic hemodynamic effects after radiofrequency catheter ablation of frequent monomorphic ventricular premature beats
    Yukio Sekiguchi
    Cardiovascular Division, Musashino Red Cross Hospital, Tokyo, Japan
    J Cardiovasc Electrophysiol 16:1057-63. 2005
    ..However, the chronic hemodynamic effects of these VPBs have not been precisely evaluated...
  26. ncbi request reprint Anti-arrhythmic efficacy of nifekalant hydrochloride, a pure class III anti-arrhythmic agent, in patients with healed myocardial infarction and inducible sustained ventricular tachycardia
    Masayuki Igawa
    Department of Cardiology, Yokosuka Kyosai Hospital, Kanagawa, and Department of Cardiovascular Medicine, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
    J Cardiovasc Pharmacol 40:735-42. 2002
    ..It was concluded that nifekalant could be used safely and showed comparable effectiveness to procainamide for the suppression of VT induction...
  27. ncbi request reprint Reentrant ventricular tachycardia originating in the right ventricular outflow tract: slow conduction identified by right coronary artery ostium pacing
    Emi Nakano
    Cardiovascular Division, St Marianna University School of Medicine, Kawasaki, Japan
    Circ J 72:855-60. 2008
    ..When radiofrequency catheter ablation was performed at the 2 exits of the anterior septum RVOT, both VTs then could not be induced...
  28. ncbi request reprint Clinical study of the efficacy of a cooled-tip catheter ablation system for common atrial flutter
    Kaoru Okishige
    Cardiovascular Center, Yokohama Red Cross Hospital, Japan
    Circ J 68:73-6. 2004
    ..Radiofrequency catheter ablation (RF-CA) of common atrial flutter (AFL) requires the creation of a transmural incision to create a bidirectional conduction block in the cavotricuspid isthmus (ITH)...
  29. ncbi request reprint Effect of hospital case volume on treatment and in-hospital outcomes in patients undergoing percutaneous coronary intervention for acute myocardial infarction. Results from the Ibaraki Coronary Artery Disease Study (ICAS) Registry
    Tomoko Ohtsuka Machino
    Division of Cardiovascular Medicine, University of Tsukuba, Ibaraki, Japan
    Int Heart J 49:249-60. 2008
    ..We did not find an obvious relationship between hospital PCI volume and in-hospital outcomes in our data. However, further prospective surveys should be attempted to confirm these results...
  30. doi request reprint Triangle ventricular pacing in a non-responder to conventional bi-ventricular pacing
    Kentaro Yoshida
    Cardiovascular Division, Institute of Clinical Medicine, University of Tsukuba, 1 1 1 Tennodai, Tsukuba 305 8575, Ibaraki, Japan
    Europace 10:502-4. 2008
    ..Triangle ventricular pacing may have the potential to decrease the number of non-responders to CRT...
  31. ncbi request reprint Edrophonium-induced right ventricular outflow tract tachycardia
    Hitoshi Hachiya
    Cardiology Department, Yokosuka Kyosai General Hospital, Kanagawa, Japan
    Pacing Clin Electrophysiol 28:S158-62. 2005
    ..v. However, RVOT-VT could only be induced by edrophonium, 5 mg i.v., in all patients. An increase in PNA was observed in a few patients before the development of RVOT-VT. Edrophonium facilitated induction of RVOT-VT in such patients...
  32. doi request reprint Early validation study of 64-slice multidetector computed tomography for the assessment of myocardial viability and the prediction of left ventricular remodelling after acute myocardial infarction
    Akira Sato
    Department of Cardiology, Yokosuka Kyosai Hospital, 1 16 Yonegahamadori, Yokosuka, Japan
    Eur Heart J 29:490-8. 2008
    ..We aim to validate the ability of multidetector computed tomography (MDCT) for assessing myocardial viability and predicting left ventricular (LV) remodelling after acute myocardial infarction (AMI)...
  33. ncbi request reprint Randomized comparison of the continuous vs point-by-point radiofrequency ablation of the cavotricuspid isthmus for atrial flutter
    Shinsuke Miyazaki
    Cardiovascular Center, Yokosuka Kyosai Hospital, Japan
    Circ J 71:1922-6. 2007
    ..The present study was a prospective comparison of the efficacy of 2 ablation strategies in patients with common AFL: the continuous and point-by-point radiofrequency (RF) delivery techniques...
  34. ncbi request reprint Serum tenascin-C might be a novel predictor of left ventricular remodeling and prognosis after acute myocardial infarction
    Akira Sato
    Department of Cardiology, Yokosuka Kyosai Hospital, Yokosuka, Japan
    J Am Coll Cardiol 47:2319-25. 2006
    ..We investigated clinical implications of serum tenascin-C (TN-C) levels in patients with acute myocardial infarction (AMI)...
  35. ncbi request reprint Integral value of JT interval in magnetocardiography is sensitive to coronary stenosis and improves soon after coronary revascularization
    Kei On
    Institute of Clinical Medicine, University of Tsukuba, Tsukuba, Japan
    Circ J 71:1586-92. 2007
    ..The present study examined the usefulness of an integral MCG value of ventricular repolarization in patients with IHD...
  36. ncbi request reprint Gender-associated differences in pharmacokinetics and anti-arrhythmic effects of flecainide in Japanese patients with supraventricular tachyarrhythmia
    Kosuke Doki
    Department of Pharmaceutical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ten nodai 1 1 1, Tsukuba, Ibaraki, 305 8575, Japan
    Eur J Clin Pharmacol 63:951-7. 2007
    ..We examined the effect of gender-associated differences in pharmacokinetics on the anti-arrhythmic effects of flecainide in Japanese patients with supraventricular tachyarrhythmia and in healthy subjects...
  37. ncbi request reprint Granulocyte colony-stimulating factor prevents progression of monocrotaline-induced pulmonary arterial hypertension in rats
    Hidekazu Maruyama
    Department of Cardiovascular Medicine, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan
    Circ J 71:138-43. 2007
    ....
  38. ncbi request reprint Successful radiofrequency ablation of ventricular premature contractions within the coronary sinus
    Yasuteru Yamauchi
    Division of Cardiology, Musashino Red Cross Hospital, Tokyo, Japan
    Pacing Clin Electrophysiol 28:1250-2. 2005
    ..Detailed pace-mapping using a high output pacing stimulator was utilized to successfully ablate VPCs within the coronary sinus...
  39. ncbi request reprint Curative therapy for swallowing-induced tachycardia by pulmonary vein antrum isolation
    Yasuteru Yamauchi
    Division of Cardiology, Musashino Red Cross Hospital, Kyonancho, Musashino, Tokyo
    J Cardiovasc Electrophysiol 16:1370-4. 2005
    ..After the right superior pulmonary vein antrum was completely isolated, the patient became free from the swallowing-induced tachycardia...
  40. ncbi request reprint Peak C-reactive protein concentration correlates with left ventricular thrombus formation diagnosed by contrast echocardiographic left ventricular opacification in patients with a first anterior acute myocardial infarction
    Yoshihiro Seo
    Cardiovascular Division, Institute of Clinical Medicine, University of Tsukuba, Tennodai, Tsukuba, Japan
    Circ J 70:1290-6. 2006
    ..The aim of this study was to identify the determinants of LV thrombus formation using contrast echocardiography...