Research Topics
| Kazutaka AonumaSummaryAffiliation: Osaka City University Country: Japan Publications
| Collaborators
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Detail Information
Publications
Utility of right precordial leads at higher intercostal space positions to diagnose Brugada syndromeMasahiko 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...- Clinical characteristics and risk stratification in symptomatic and asymptomatic patients with brugada syndrome: multicenter study in JapanMasahiko 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... 
Acute improvement of atrial mechanical stunning after electrical cardioversion of persistent atrial fibrillation: comparison between biatrial and single atrial pacingM 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)...- The "pop phenomenon" detected by phased array intracardiac echocardiographyM Takagi
Heart 89:706. 2003 - Histological gap between ablation lesions detected by phased array intracardiac echocardiographyM Takagi
Heart 87:567. 2002 - Pilsicanide-induced marked T wave alternans and ventricular fibrillation in a patient with Brugada syndromeMasahiko Takagi
Department of Internal Medicine and Cardiology, Graduate School of Medicine, Osaka City University, Osaka, Japan
J Cardiovasc Electrophysiol 13:837. 2002 - Anti-arrhythmic efficacy of nifekalant hydrochloride, a pure class III anti-arrhythmic agent, in patients with healed myocardial infarction and inducible sustained ventricular tachycardiaMasayuki 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... 
Association of sleep-disordered breathing and ventricular arrhythmias in patients without heart failureYuki 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...- 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 designTakashi Kurita
Department of Cardiovascular Medicine, National Cardiovascular Center, Suita, Japan
Circ J 70:316-20. 2006.... - Ventricular tachycardia originating from the epicardium identified by intracoronary mapping using a PTCA guidewireKoji 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... - Atrial tachycardia originating from the upper left atrial septum: demonstration of transseptal interatrial conduction using the infolded atrial wallsKoji 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... - Electrocardiographic characteristics of the variants of idiopathic left ventricular outflow tract ventricular tachyarrhythmiasKoji 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... - In vivo electropharmacological effects of amiodarone and candesartan on atria of chronic atrioventricular block dogsKai 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.... - Atrial unipolar potential in radiofrequency catheter ablation of atrial tachycardiaYohkoh 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... - Effect of triangle ventricular pacing on haemodynamics and dyssynchrony in patients with advanced heart failure: a comparison study with conventional bi-ventricular pacing therapyKentaro 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... - Effect of left atrial ablation on the quality of life in patients with atrial fibrillationShinsuke 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... - Chronic hemodynamic effects after radiofrequency catheter ablation of frequent monomorphic ventricular premature beatsYukio 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... - Enhancement of J-ST-segment elevation by the glucose and insulin test in Brugada syndromeAkihiko 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... - Feasibility of targeting catheter ablation to the markedly low-voltage area surrounding infarct scars in patients with post-infarction ventricular tachycardiaKentaro 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... - Ventricular unipolar potential in radiofrequency catheter ablation of idiopathic non-reentrant ventricular outflow tachycardiaYohkoh 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... - How to diagnose, locate, and ablate coronary cusp ventricular tachycardiaHitoshi 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... - Electrocardiographic and electrophysiologic characteristics of ventricular tachycardia originating within the pulmonary arteryYukio 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)... - Permanent His-bundle pacing after atrioventricular node ablation in a patient with chronic atrial fibrillation and mitral regurgitationYasuteru Yamauchi
Cardiology Department, Musashino Red Cross Hospital, Tokyo 180 8610, Japan
Circ J 69:510-4. 2005.... - Idiopathic left ventricular tachycardia originating from the mitral annulusKoji 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)... - Electrocardiographic characteristics of repetitive monomorphic right ventricular tachycardia originating near the His-bundleYasuteru 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... - Reentrant ventricular tachycardia originating in the right ventricular outflow tract: slow conduction identified by right coronary artery ostium pacingEmi 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... - 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 infarctionAkira 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)... - Triangle ventricular pacing in a non-responder to conventional bi-ventricular pacingKentaro 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... - Randomized comparison of the continuous vs point-by-point radiofrequency ablation of the cavotricuspid isthmus for atrial flutterShinsuke 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... - Integral value of JT interval in magnetocardiography is sensitive to coronary stenosis and improves soon after coronary revascularizationKei 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... - Clinical study of the efficacy of a cooled-tip catheter ablation system for common atrial flutterKaoru 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)... - Edrophonium-induced right ventricular outflow tract tachycardiaHitoshi 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... - Successful radiofrequency ablation of ventricular premature contractions within the coronary sinusYasuteru 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... - Curative therapy for swallowing-induced tachycardia by pulmonary vein antrum isolationYasuteru 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... - Serum tenascin-C might be a novel predictor of left ventricular remodeling and prognosis after acute myocardial infarctionAkira Sato
Department of Cardiology, Yokosuka Kyosai Hospital, Yokosuka, Japan
J Am Coll Cardiol 47:2319-25. 2006..Cox proportional hazards model analysis showed that TN-C was an important independent predictor of MACE. CONCLUSIONS: The findings suggest that serum TN-C levels might be useful in predicting LV remodeling and prognosis after AMI... - 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 infarctionYoshihiro 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... - Granulocyte colony-stimulating factor prevents progression of monocrotaline-induced pulmonary arterial hypertension in ratsHidekazu Maruyama
Department of Cardiovascular Medicine, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan
Circ J 71:138-43. 2007.... - Gender-associated differences in pharmacokinetics and anti-arrhythmic effects of flecainide in Japanese patients with supraventricular tachyarrhythmiaKosuke 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... - 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) RegistryTomoko 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...