TC-RF （transcatheter radiofrequency） ablation has an important role in the treatment ofSVA （supraventricular arrhythmias）. The indication to TC-RF ablation is usually made to improve the patient＇s quality of life...TC-RF （transcatheter radiofrequency） ablation has an important role in the treatment ofSVA （supraventricular arrhythmias）. The indication to TC-RF ablation is usually made to improve the patient＇s quality of life through the elimination of the arrhythmic substrate. The objective of this study is to make a brief review of the literature and to report the Electrophysiology Unit experience of the Cardiovascular Department of the University Hospital of Trieste. From the study, it can be found that about one thousand of patients are visited annually in the Cardiovascular Department of the University Hospital of Trieste （1,019 ± 71/year over the past five years）. The acute success rate of atrial fibrillation and flutter ablation procedures was respectively 93.9% and 97.9% with a relapse rate of 30% and 10% at 12 month. Accessory pathways and nodal atrio ventricular re-entry tachycardia ablation procedures had an acute success rate of respectively 91.1% and 96.6% with a relapse rate of 10% at 12 months. The overall complication rate was 5%. Catheter ablation is an effective therapy for SVA treatment. It can often be definitive, and it is generally superior to drug therapy, with a low complication rate. The improvement in patients＇ quality of life is associated with a reduced need for access to health services.展开更多
The effect of selective radiofrequency ablation for treating paroxysmal supraventricular tachycardia （PSVT） and its associated paroxysmal atrial fibrillation （PAF） was assessed. Methods Data were collected retrosp...The effect of selective radiofrequency ablation for treating paroxysmal supraventricular tachycardia （PSVT） and its associated paroxysmal atrial fibrillation （PAF） was assessed. Methods Data were collected retrospectively from patients diagnosed of PSVT and subsequently treated with radiofrequency ablation. Regular monthly follow-up by dynamic electrocardiography （ECG） was performed. Incident rates of atrial fibrillation before and after ablation were compared. Results 382 PSVT patients with 58 having atrial fibrillation were en- rolled. The order of complicated PAF from high to low in these patients was displayed as： atrial tachycardia （AT）, atrioventricular reentrant tachycardia （AVRT） and atrioventricular nodal reentrant tachycardia （AVNRT）. Among AVRT patients, PAF was more frequent in patients having accessory pathways. AVNRT patients had significant- ly lower PAF rate comparing to other patients. PAF incident rate was significantly reduced by radiofrequency ablation therapy. Conclusion We advise regular dynamic ECG for PSVT patients, especially those with atrial flutter, AT or pre-excitation syndrome. Selective radiofrequency ablation is a feasible approach for treating AF complicated PSVT patients.展开更多
In patients with structural heart disease, ventricular tachycardia (VT) worsens the clinical condition and may severely affect the shortand long-term prognosis. Several therapeutic options can be considered for the ma...In patients with structural heart disease, ventricular tachycardia (VT) worsens the clinical condition and may severely affect the shortand long-term prognosis. Several therapeutic options can be considered for the management of this arrhythmia. Among others, catheter ablation, a closed-chest therapy, can prevent arrhythmia recurrences by abolishing the arrhythmogenic substrate. Over the last two decades, different techniques have been developed for an effective approach to both tolerated and untolerated VTs. The clinical outcome of patients undergoing ablation has been evaluated in multiple studies. This editorial gives an overview of the role, methodology, clinical outcome and innovative approaches in catheter ablation of VT.展开更多
In this study we compared the effects of radiofrequency (RF) energy applied to the swine endocardium in a unipolar fashion and in a bipolar one with two different interelectrode distances (5mm, 10mm). RF energy (500 k...In this study we compared the effects of radiofrequency (RF) energy applied to the swine endocardium in a unipolar fashion and in a bipolar one with two different interelectrode distances (5mm, 10mm). RF energy (500 kHz) delivered to the swine endocardium was divided into eight categories : 100J, 101-200 J, 201-300 J, 301-400 J, 401-500 J, 501-600 J, 601-1000 J, and>1000J. The results showed that when RF energy was applied in a bipolar fashion, the lesions involved the catheter/tissue interface and partly the interelectrode spacing, while in a unipolar fashion. They were found in the catheter/tissue interface only. At any energy level, there were no statistically significant differences in lesion depths among all the three fashions, and the lesion surface areas produced by the bipolar fashion (with 5 mm or 10 mm interelectrode spacing) were all greater than those by the unipolar fashion (P< 0. 05). When the delivered energy was under 500 joules, a greater lesion surface area was found in 5 mm bipolar fashion than in 10mm bipolar fashion (P<0. 05), while energy exceeded 500 joules, the differences in the lesion surface areas were no longer significant between these two bipolar fashions.展开更多
目的通过食道电生理检查(transesophageal atrial pacing,TEAP)与心内电生理(electrophysiology study of the heart,EPS)比较研究,探讨小儿室上性心动过速(supraventricular tachycardia,SVT)射频消融(radiofre-quency catheter ablati...目的通过食道电生理检查(transesophageal atrial pacing,TEAP)与心内电生理(electrophysiology study of the heart,EPS)比较研究,探讨小儿室上性心动过速(supraventricular tachycardia,SVT)射频消融(radiofre-quency catheter ablation,RFCA)术前TEAP对小儿SVT的发病机制、诊断价值及介入治疗适应证规范应用。方法对1998年8月-2007年1月经RFCA治疗的SVT34例患儿的TEAP及EPS资料进行对比分析。结果SVT34例,30例TEAP显示房室结折返性心动过速(atrioventricular nodal reentrant tachycardia,AVNRT)5例,房室折返性心动过速(atrioventricular reentrant tachycardia,AVRT)25例,与EPS的诊断符合率为96.7%(29/30例);EPS诊断AVRT30例,AVNRT4例。成功消融32例,手术未见明显并发症。结论TEAP与EPS检查结果符合率较高,可作为快速性心律失常的初步诊断及定位,为选择EPS及RFCA术指征重要辅助手段;RFCA根治小儿室上性心动过速疗效肯定,是小儿SVT安全可行的介入治疗方法。展开更多
文摘TC-RF （transcatheter radiofrequency） ablation has an important role in the treatment ofSVA （supraventricular arrhythmias）. The indication to TC-RF ablation is usually made to improve the patient＇s quality of life through the elimination of the arrhythmic substrate. The objective of this study is to make a brief review of the literature and to report the Electrophysiology Unit experience of the Cardiovascular Department of the University Hospital of Trieste. From the study, it can be found that about one thousand of patients are visited annually in the Cardiovascular Department of the University Hospital of Trieste （1,019 ± 71/year over the past five years）. The acute success rate of atrial fibrillation and flutter ablation procedures was respectively 93.9% and 97.9% with a relapse rate of 30% and 10% at 12 month. Accessory pathways and nodal atrio ventricular re-entry tachycardia ablation procedures had an acute success rate of respectively 91.1% and 96.6% with a relapse rate of 10% at 12 months. The overall complication rate was 5%. Catheter ablation is an effective therapy for SVA treatment. It can often be definitive, and it is generally superior to drug therapy, with a low complication rate. The improvement in patients＇ quality of life is associated with a reduced need for access to health services.
文摘The effect of selective radiofrequency ablation for treating paroxysmal supraventricular tachycardia （PSVT） and its associated paroxysmal atrial fibrillation （PAF） was assessed. Methods Data were collected retrospectively from patients diagnosed of PSVT and subsequently treated with radiofrequency ablation. Regular monthly follow-up by dynamic electrocardiography （ECG） was performed. Incident rates of atrial fibrillation before and after ablation were compared. Results 382 PSVT patients with 58 having atrial fibrillation were en- rolled. The order of complicated PAF from high to low in these patients was displayed as： atrial tachycardia （AT）, atrioventricular reentrant tachycardia （AVRT） and atrioventricular nodal reentrant tachycardia （AVNRT）. Among AVRT patients, PAF was more frequent in patients having accessory pathways. AVNRT patients had significant- ly lower PAF rate comparing to other patients. PAF incident rate was significantly reduced by radiofrequency ablation therapy. Conclusion We advise regular dynamic ECG for PSVT patients, especially those with atrial flutter, AT or pre-excitation syndrome. Selective radiofrequency ablation is a feasible approach for treating AF complicated PSVT patients.
文摘In patients with structural heart disease, ventricular tachycardia (VT) worsens the clinical condition and may severely affect the shortand long-term prognosis. Several therapeutic options can be considered for the management of this arrhythmia. Among others, catheter ablation, a closed-chest therapy, can prevent arrhythmia recurrences by abolishing the arrhythmogenic substrate. Over the last two decades, different techniques have been developed for an effective approach to both tolerated and untolerated VTs. The clinical outcome of patients undergoing ablation has been evaluated in multiple studies. This editorial gives an overview of the role, methodology, clinical outcome and innovative approaches in catheter ablation of VT.
文摘In this study we compared the effects of radiofrequency (RF) energy applied to the swine endocardium in a unipolar fashion and in a bipolar one with two different interelectrode distances (5mm, 10mm). RF energy (500 kHz) delivered to the swine endocardium was divided into eight categories : 100J, 101-200 J, 201-300 J, 301-400 J, 401-500 J, 501-600 J, 601-1000 J, and>1000J. The results showed that when RF energy was applied in a bipolar fashion, the lesions involved the catheter/tissue interface and partly the interelectrode spacing, while in a unipolar fashion. They were found in the catheter/tissue interface only. At any energy level, there were no statistically significant differences in lesion depths among all the three fashions, and the lesion surface areas produced by the bipolar fashion (with 5 mm or 10 mm interelectrode spacing) were all greater than those by the unipolar fashion (P< 0. 05). When the delivered energy was under 500 joules, a greater lesion surface area was found in 5 mm bipolar fashion than in 10mm bipolar fashion (P<0. 05), while energy exceeded 500 joules, the differences in the lesion surface areas were no longer significant between these two bipolar fashions.
文摘目的探讨三维电场导航系统(EnSite-NavX)非X线透视引导下导管射频消融术(RFCA)治疗阵发性室上性心动过速(PSVT)的可行性。方法对42例PSVT患者,在NavX系统非X线透视引导下行RFCA。结果 42例PSVT,其中房室结折返性心动过速22例、房室折返性心动过速20例(右侧旁道4例,左侧旁道15例,左、右侧双旁道1例),全部消融成功,无严重并发症发生。前8例为验证消融靶点位置行数秒X线透视,1例患者左锁骨下-奇静脉迂曲畸形,行静脉造影,1例左前隐匿性旁道非X线透视引导下消融未成功,改在透视下消融,更换合适消融导管消融成功,X线曝光时间6 m in,其余患者手术全程在非X线透视下完成。结论 NavX非透视引导下行RFCA是可行的。
文摘目的通过食道电生理检查(transesophageal atrial pacing,TEAP)与心内电生理(electrophysiology study of the heart,EPS)比较研究,探讨小儿室上性心动过速(supraventricular tachycardia,SVT)射频消融(radiofre-quency catheter ablation,RFCA)术前TEAP对小儿SVT的发病机制、诊断价值及介入治疗适应证规范应用。方法对1998年8月-2007年1月经RFCA治疗的SVT34例患儿的TEAP及EPS资料进行对比分析。结果SVT34例,30例TEAP显示房室结折返性心动过速(atrioventricular nodal reentrant tachycardia,AVNRT)5例,房室折返性心动过速(atrioventricular reentrant tachycardia,AVRT)25例,与EPS的诊断符合率为96.7%(29/30例);EPS诊断AVRT30例,AVNRT4例。成功消融32例,手术未见明显并发症。结论TEAP与EPS检查结果符合率较高,可作为快速性心律失常的初步诊断及定位,为选择EPS及RFCA术指征重要辅助手段;RFCA根治小儿室上性心动过速疗效肯定,是小儿SVT安全可行的介入治疗方法。
