Background Atrioventricular nodal reentrant tachycardia （AVNRT） is one of the most common paroxysmal supraventricular tachyarrhythmias. The aim of the study was to prospectively compare the characteristics of radiof...Background Atrioventricular nodal reentrant tachycardia （AVNRT） is one of the most common paroxysmal supraventricular tachyarrhythmias. The aim of the study was to prospectively compare the characteristics of radiofrequency catheter ablation of AVNRT guided by a magnetic navigation system with the conventional procedure. Methods Patients with AVNRT diagnosed by electrophysiological tests were randomized into two groups. In the conventional technique group （CMT）, a common 4-mm-tip quadrapolar temperature-controlled ablation catheter was used. In the magnetic navigation system guidance group （MNS）, a magnetic 4-mm-tip quadrapolar temperature-controlled ablation catheter was used. The following parameters were collected and compared between the two groups： ablation procedure time, patient fluoroscopy time, operator fluoroscopy time, energy delivery numbers, maximal energy per deployment, success rate, complication rate and operative cost. Results Forty patients were enrolled and randomized into CMT and MNS groups. The age, gender, tachycardia history and basic cardiovascular diseases of the two groups were comparable （P 〉0.05）. All procedures were conducted successfully without complications. No tachycardia recurred during the follow-up period of （9.3±2.6） months. In the MNS group, the patient and operator fluoroscopy times （（11.5±4.3） min, （4.2±1.5） min）, energy delivery numbers （3.2_＋0.9）, and maximal energy per deployment （16.9±3.4） W） were shorter or lower than those of the CMT group （（14.3±6.2） min, （13.6±3.5） min, 6.3±2.1, （23.7±1.3） W, respectively） （P 〈0.05）. But the operative cost for the MNS group was higher than that of the CMT group （P 〈0.01 ）. Conclusion Magnetic navigation system guided radiofrequency catheter ablation of AVNRT has the advantages of shorter fluoroscopy time and lower energy delivery numbers and maximal energy per deployment compared to the present conventional ablation technique.展开更多
目的探讨EnSite NavX标测指导下房室结折返性心动过速(AVNRT)射频消融术的可行性和安全性。方法 124例阵发性室上性心动过速的患者接受射频消融术被随机分为采用EnSite NavX系统标测指导组和常规透视组(X线)。结果 65例为AVNRT,其中标...目的探讨EnSite NavX标测指导下房室结折返性心动过速(AVNRT)射频消融术的可行性和安全性。方法 124例阵发性室上性心动过速的患者接受射频消融术被随机分为采用EnSite NavX系统标测指导组和常规透视组(X线)。结果 65例为AVNRT,其中标测指导组32例,常规透视组33例。所有手术均获得即刻的成功,无手术并发症。与常规透视组比较,标测指导组手术时间长(64.6±12.7 min vs 37.5±13.6 min,P<0.01);而X线透视时间少(27.62±31.5 s vs 324.2±108.3 s,P<0.01),其中有21例(65.6%)未接受X线透视。平均随访6个月均无心动过速复发。结论 EnSite NavX标测指导下AVNRT射频消融安全有效,且显著减少了X线透视时间。展开更多
文摘Background Atrioventricular nodal reentrant tachycardia （AVNRT） is one of the most common paroxysmal supraventricular tachyarrhythmias. The aim of the study was to prospectively compare the characteristics of radiofrequency catheter ablation of AVNRT guided by a magnetic navigation system with the conventional procedure. Methods Patients with AVNRT diagnosed by electrophysiological tests were randomized into two groups. In the conventional technique group （CMT）, a common 4-mm-tip quadrapolar temperature-controlled ablation catheter was used. In the magnetic navigation system guidance group （MNS）, a magnetic 4-mm-tip quadrapolar temperature-controlled ablation catheter was used. The following parameters were collected and compared between the two groups： ablation procedure time, patient fluoroscopy time, operator fluoroscopy time, energy delivery numbers, maximal energy per deployment, success rate, complication rate and operative cost. Results Forty patients were enrolled and randomized into CMT and MNS groups. The age, gender, tachycardia history and basic cardiovascular diseases of the two groups were comparable （P 〉0.05）. All procedures were conducted successfully without complications. No tachycardia recurred during the follow-up period of （9.3±2.6） months. In the MNS group, the patient and operator fluoroscopy times （（11.5±4.3） min, （4.2±1.5） min）, energy delivery numbers （3.2_＋0.9）, and maximal energy per deployment （16.9±3.4） W） were shorter or lower than those of the CMT group （（14.3±6.2） min, （13.6±3.5） min, 6.3±2.1, （23.7±1.3） W, respectively） （P 〈0.05）. But the operative cost for the MNS group was higher than that of the CMT group （P 〈0.01 ）. Conclusion Magnetic navigation system guided radiofrequency catheter ablation of AVNRT has the advantages of shorter fluoroscopy time and lower energy delivery numbers and maximal energy per deployment compared to the present conventional ablation technique.
文摘目的探讨EnSite NavX标测指导下房室结折返性心动过速(AVNRT)射频消融术的可行性和安全性。方法 124例阵发性室上性心动过速的患者接受射频消融术被随机分为采用EnSite NavX系统标测指导组和常规透视组(X线)。结果 65例为AVNRT,其中标测指导组32例,常规透视组33例。所有手术均获得即刻的成功,无手术并发症。与常规透视组比较,标测指导组手术时间长(64.6±12.7 min vs 37.5±13.6 min,P<0.01);而X线透视时间少(27.62±31.5 s vs 324.2±108.3 s,P<0.01),其中有21例(65.6%)未接受X线透视。平均随访6个月均无心动过速复发。结论 EnSite NavX标测指导下AVNRT射频消融安全有效,且显著减少了X线透视时间。
