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1.
显性多旁道的电生理特点和射频消融治疗 总被引:1,自引:0,他引:1
目的报道显性多旁道的心电生理特点和射频消融治疗。方法回顾性分析70例显性多旁道患者的一般临床资料、旁道分布特点、心动过速类型及消融治疗的效果。结果①70例均有心动过速发作史,29例有2种、6例有3种心动过速;②70例共有158例显性旁道,18例为3条旁道,52例为2条旁道;③61例可诱发AVRT,其中13例为逆向型AVRT;④消融患者的成功率为97.1%(68/70例),消融的旁道成功率为98.7%(156/158条)。结论显性多旁道易发生多种心动过速,射频消融治疗成功率高。 相似文献
2.
探讨Mahaim纤维的电生理特征和导管射频消融的可行性。 1996年 5月至 1999年 4月对 4例拟诊为Mahaim纤维引起的逆向型房室折返性心动过速的病人进行了电生理检查和射频导管消融。男 3例、女 1例 ,年龄 31± 19岁 ,心动过速发作史 15± 14年 ,频率 2 0 1± 17(180~ 2 2 0 )次 /分 ,发作时均有明显的心悸症状。 4例窦性心律时心电图除 1例轻微预激外均正常。心房程序电刺激可以诱发心动过速。心室起搏时从房室结逆传 ,静脉注射ATP 2 0mg室房分离。 4例Mahaim心动过速均只有前传并呈递减传导特性。 1例同时合并房室结折返性心动过速。 2例导管操作发生心房颤动并经过Mahaim纤维前传 ,1例持续发作、1例短暂发作。 4例分别在心房起搏、心动过速和心房颤动时三尖瓣心房侧标测和消融。心室预激较体表V1导联QRS波起始处提前 40± 6 (34~ 46 )ms处消融均获成功 ,1例靶点位于右前侧壁、3例位于右后侧壁。能量 35± 5W ,消融 5± 3次 ,X线透视时间 38± 2 1min。无手术相关的并发症。合并房室结折返性心动过速 1例同时作了慢径改良。分别随访 3个月~ 3年无 1例心动过速复发。临床研究证实 ,导管射频消融是治疗Mahaim介导的心动过速的有效、可行和安全的方法 相似文献
3.
少数旁道在心外膜下穿过房室瓣环,故称为心外膜旁道。其可以分布在房室瓣环的任何部位,但以后间隔心外膜旁道最为多见。此外,还有非后间隔部位的左侧心外膜旁道,心耳和心室之间的心外膜旁道,以及前间隔心外膜旁道。它们各自有独特的解剖学上的组成以及电生理性质和消融途径。 相似文献
4.
将 6例具有宽旁道电生理特点的心动过速患者 (均为左侧旁路 )在右前斜位 30°于二尖瓣环心室侧细标靶点 ,每一理想靶点 2 5 W试消融 1min,直至完全阻断旁路。结果 :6例患者成功消融旁路 ,消融范围 1.6~2 .9cm,平均为 (2 .2± 0 .8) cm,消融靶点数 5~ 9次 ,平均为 (5 .6± 2 .3)次 ,消融时间为 1.1~ 3.1小时 ,平均为(1.3± 1.2 )小时。认为增强对宽旁道电生理特征的认识 ,耐心细致标测靶点 ,在较大范围消融 ,可提高宽旁道消融的成功率。 相似文献
5.
患者男,45岁。发作性心悸3年,多发于紧张、活动或“感冒”时。心电图:窦性心律时正常;发作时呈宽QRS波心动过速(完全性左束支阻滞图形)。右室S1S1刺激600ms即出现室房分离,右房S1S1、S1S2刺激无异常发现。静脉滴注异丙肾上腺素后右房S1S1刺激诱发窄QRS波心动过速,此时冠状静脉窦电极远端逆A波最早。左室起搏下于靶点放电成功阻断旁道逆传。随访1个月无复发。考虑为儿茶酚胺依赖性左侧隐匿旁道。 相似文献
6.
患者男性,32岁,因阵发性心动过速10余年,发作时心电图提示右侧隐匿性预激综合征,心内标测定位旁道在三尖瓣环11点处,靶点VA间期为22ms,第一次放电后8s出现室房分离,10min后用400ms心室起搏诱发心动过速,并难以终止,或终止后数秒内又复发,标测原靶点部位VA间期100ms,但A波仍最提前,再次放电3s心动过速终止,室房分离,逆传A波呈中心性分布,提示普通旁道经过射频损伤后蜕变为慢旁道。 相似文献
7.
报道1例束室纤维合并双房室旁道的电生理表现。患者有心动过速史15年,心电图示右侧游离壁显性旁道,分别于三尖瓣环8点半和5点半处消融阻断旁道,原心电图发生了改变,但存在Delta波。上述两条旁道消融前,PR间期均为0.06s,心房递增刺激Delta波增大,房室传导无文氏现象。两条房室旁道消融后,PR间期为0.10s、AH间期100ms、HV间期20ms。心房递增刺激时AH间期逐渐延长且出现文氏型房室阻滞,HV间期不变、预激程度不变,提示为Mahaim纤维(束室支)。心室刺激时逆传A波在His束电图最早,提示His束逆传。三尖瓣环上未能标测到A、V波融合。心房、心室刺激未能诱发心动过速。 相似文献
8.
报道1例具有Mahaim纤维特性左侧旁道参与的宽QRS波心动过速:V1~V6均以R波为主,电轴左偏,呈右束支阻滞型。心内电生理检查:无典型预激图形,心房刺激出现与心动过速一致的宽QRS波,见旁道前传文氏现象;室房逆传呈向心性递减,心动过速时His束电图呈V-H-A顺序,逆传A波以His柬部位最早;三磷酸腺苷可阻断旁道前传。窦性心律下,在左室中后间隔消融放电阻断旁道,术前极易发作的心动过速不再诱发,术后见房室传导跳跃现象。考虑该旁道起自房室结慢径或附近的心房肌,止于左室基底部。 相似文献
9.
导管射频消融右侧房室旁道的回顾性分析 总被引:5,自引:0,他引:5
对连续接受导管射频消融的54例右侧旁道病人进行回顾分析,试图总结实用有效的常规消融方法。54例中右游离壁旁道28例、右前间隔9例、右中间隔5例、右后间隔12例。100%消融成功,无并发症。随访7.5±3.8个月,术后24h复发3例,3个月复发1例,均再次消融成功。右游离壁和右前间隔旁道较右中间隔和右后间隔旁道心室波提前程度大(26.6±14.2和21.4±10.7msvs16.3±18.5和14.5±11.8ms,P<0.05),消融能量高(43.3±5.4和37.8±9.2Wvs21.4±7.1和26.7±5.7W,P<0.05),A、V波比值较小。中间隔和后间隔旁道较游离壁和前间隔旁道心房波振幅高(1.0±0.3和0.9±0.6mVvs0.5±0.4和0.6±0.3mV,P<0.05),导管较稳定。旁道在1s内阻断者心室波提前程度、心房波振幅、导管稳定性和消融能量与旁道在5s以上阻断者比较,差异有显著性(P<0.05),而且旁道阻断时间越短者,其心室波提前程度越大、心房波振幅越高,A、V波比值越大,导管越稳定。提示影响右侧显性房室旁道消融成功率的主要因素是导管操作者的经验和对靶点图的识别,这些涉及到对消? 相似文献
10.
目的报道机械瓣膜置换术后患者左侧旁道射频消融的经验。方法分析瓣膜置换术后患者左侧旁道射频消融的影像学和导管操作的特点,以及消融术前后的注意事项。结果 3例患者(男1例,女2例),年龄为32,46,46岁,分别为二尖瓣置换术后(2例)和主动脉瓣与二尖瓣联合换瓣术后(1例),均行心内电生理检查诊断为经左侧旁道折返的顺向型房室折返性心动过速,分别经主动脉逆行法(2例)和穿房间隔法(1例)射频消融治疗成功。结论换瓣术后患者的左侧旁道可考虑经导管射频消融治疗。 相似文献
11.
New Electrophysiologic Features and Catheter Ablation of Atrioventricular and Atriofascicular Accessory Pathways: 总被引:5,自引:0,他引:5
KAORU OKISHIGE M.D. YOSHINARI GOSEKI M.D. AKIO ITOH M.D. NAOYA TSUBOI M.D. TETSUO SASANO M.D. KOUJI AZEGAMI M.D. HIROSHI OHIRA M.D. KATSUHIRO YAMASHITA M.D. SHUTAROU SATAKE M.D. KAZUMASA HIEJIMA M.D. 《Journal of cardiovascular electrophysiology》1998,9(1):22-33
Catheter Ablation for Mahaim Pathways. Introduction : Several modalities of catheter ablation have been proposed to eliminate Mahaim pathway conduction. However, limited research has been reported on the electrophysiologic nature of this pathway in its entity.
Methods and Results : In seven patients, electrophysiologic study was performed, and radiofrequency energy was applied to investigate the electrophysiologic clues for successful ablation. In all seven patients, the Mahaim pathway was diagnosed as a right-sided atriofascicular or atrioventricular pathway with decremental properties. In two patients, two different kinds of electrograms were recorded through the ablation catheter positioned at the Mahaim pathway location: one was suggestive of conduction over the decremental portion, demonstrating a dulled potential; and the other of nondecremental conduction, demonstrating a spiked potential. All but one of the Mahaim pathways were eliminated successfully at the atrial origin where the spiked Mahaim potential was recorded. Radiofrequency energy application was performed at the slow potential site resulting in failure to eliminate the conduction over the Mahaim pathway. Conduction block at the site between the slow and fast potential recording sites was provoked by intravenous administration of adenosine, concomitant with a decrease in the amplitude of the Mahaim potential. In one patient, the clinical arrhythmia was a sustained monomorphic ventricular tachycardia originating from the ventricular end of the Mahaim fiber.
Conclusion : The identification of Mahaim spiked potentials may be the optimal method to permit their successful ablation. Detailed electrophysiologic assessment is indispensable for successful ablation of tachycardias associated with Mahaim fibers because tachycardias unassociated with Mahaim fibers can occur despite complete elimination of the Mahaim fiber. 相似文献
Methods and Results : In seven patients, electrophysiologic study was performed, and radiofrequency energy was applied to investigate the electrophysiologic clues for successful ablation. In all seven patients, the Mahaim pathway was diagnosed as a right-sided atriofascicular or atrioventricular pathway with decremental properties. In two patients, two different kinds of electrograms were recorded through the ablation catheter positioned at the Mahaim pathway location: one was suggestive of conduction over the decremental portion, demonstrating a dulled potential; and the other of nondecremental conduction, demonstrating a spiked potential. All but one of the Mahaim pathways were eliminated successfully at the atrial origin where the spiked Mahaim potential was recorded. Radiofrequency energy application was performed at the slow potential site resulting in failure to eliminate the conduction over the Mahaim pathway. Conduction block at the site between the slow and fast potential recording sites was provoked by intravenous administration of adenosine, concomitant with a decrease in the amplitude of the Mahaim potential. In one patient, the clinical arrhythmia was a sustained monomorphic ventricular tachycardia originating from the ventricular end of the Mahaim fiber.
Conclusion : The identification of Mahaim spiked potentials may be the optimal method to permit their successful ablation. Detailed electrophysiologic assessment is indispensable for successful ablation of tachycardias associated with Mahaim fibers because tachycardias unassociated with Mahaim fibers can occur despite complete elimination of the Mahaim fiber. 相似文献
12.
Radiofrequency Ablation of a Mahaim Fiber Following Localization of Mahaim Pathway Potentials 总被引:1,自引:0,他引:1
J. PAUL MOUNSEY B.M. Ph .D. MICHAEL J. GRIFFITH M.D. JANET M. McComb M.D. 《Journal of cardiovascular electrophysiology》1994,5(5):432-437
Mahaim Fiber Ablation. We report radiotfrequency ablation of a Mahaim fiber in a patient with wide complex supraventricular tachycardia. Pathway potentials from the lateral aspect of the right AV groove were recorded, which were distinct from the His potential. During atrial pacing, decremental properties of the fiber were demonstrated, which resulted in prolongation of the interval between the atrial electrogram and the Mahaim pathway potential. The pathway potentials, preexcitation, and tachycardia disappeared after a single application of radiofrequency energy, after which the patient has remained free of palpitations. Mapping of a Mahaim fiber by identifying pathway potentials thus allowed accurate localization and successful ablation with minimal energy. We therefore suggest that, where possible, recording of such Mahaim potentials may be the optimal technique for Mahaim liber localization. 相似文献
13.
报道 13例左侧心外膜旁道的特点和经冠状静脉窦射频消融的结果。 13例左侧旁道患者先经心内膜标测和消融 ,如不成功改由经冠状静脉窦标测 ,记录到旁道电位或最早激动的V波或逆传A波即进行消融。结果 :13例患者全部成功 ,平均放电 1.5± 0 .6次 ,能量 2 1± 4W ,时间 2 1± 9s。成功消融靶点 :左侧游离壁 2例、左后间隔冠状静脉窦憩室 4例、心中静脉 7例。 11例有效靶点均标测到振幅较大的旁路电位 ,其振幅大于A波和V波 ,与二者之比均大于 1。结论 :冠状静脉窦标测到振幅较大的旁道电位是左侧心外膜旁道的重要标志 ;冠状静脉窦消融可以有效地阻断心外膜侧旁道 相似文献
14.
报道心外膜房室旁道的特点和经冠状静脉窦射频消融术的结果。3例后间隔显性房室旁道患者先经心内膜标测和消融,不成功后改由经冠状静脉窦内标测和消融。术中冠状动脉造影,观察冠状静脉窦形态。结果: 2例冠状静脉窦近端有一憩室,并在憩室的颈部消融阻断房室旁道。成功靶点图为标测到振幅较大的旁道电位,其振幅大于A波和V波。结论:经心内膜标测和消融失败的旁道可能是心外膜旁道,行冠状静脉窦内标测与消融可有效阻断旁道,冠状静脉窦憩室与后间隔旁道可能存在着解剖关系。 相似文献
15.
目的探讨快频率依赖性室房逆传特性左侧隐匿性房室旁道的电生理特点及射频消融。方法对8例心电图显示窄QRS波群心动过速的患者行电生理检查,分析房室、室房传导情况、心动过速特点、旁道定位,并行射频消融。结果8例患者均证实存在快频率依赖性室房逆传特性左侧隐匿性旁道,在较慢频率起搏右心室时旁道逆传发生阻滞,而以中等频率起搏时表现为间断旁道逆传,较快频率起搏时才表现为旁道1:1传导且均诱发了房室折返性心动过速,于快频率心室刺激下标测消融靶点,消融均获成功。结论左侧隐匿性房室旁道有时可发生快频率依赖性室房逆传现象,并伴发房室折返性心动过速,在射频消融中需注意分辨,以免漏诊。 相似文献
16.
经上腔静脉途径射频消融右侧前上和前间隔房室旁道 总被引:4,自引:1,他引:4
报道经上腔静脉途径射频消融右侧前上和前间隔房室旁道的体会。 13例右侧前上或前间隔单一房室旁道患者 ,常规下腔静脉途径消融未能成功 ,失败原因包括 :消融电极与心肌接触不良或难以固定于三尖瓣环上。改经上腔静脉途径成功消融阻断所有房室旁道。平均放电 1.8± 0 .7次 ,输出功率 33± 4W ,消融靶点电图振幅明显高于下腔静脉途径 (1.4± 0 .3mVvs 0 .6± 0 .4mV ,P <0 .0 5 )。术后随访 17± 9个月 ,无 1例复发。作者认为对经下腔静脉途径消融失败的右侧前上和前间隔房室旁道采用上腔静脉途径消融可获得成功。 相似文献
17.
特发性左心室室性心动过速合并房室旁路的诊断和射频导管消融术 总被引:1,自引:0,他引:1
目的 :报道特发性左心室室性心动过速 (ILVT)合并房室旁路的鉴别诊断和射频导管消融术 (RFCA)结果。方法 :15 6例ILVT患者 ,常规方法进行电生理检查和RFCA ,对诱发室性心动过速室房呈 1∶1传导的患者给予三磷酸腺苷2 0~ 3 0mg静脉注射 ,观察对三磷酸腺苷的反应。同时行RS2 刺激 ,观察有无A波提前 ,明确房室旁路逆传。结果 :5例对逆向传导无影响 ,逆传A波呈非向心性分布 ,同时心室RS2 刺激A波提前 ,证明存在房室旁路逆传 ,5条房室旁路全部消融成功。消融房室旁路后再次诱发ILVT时出现室房分离 ,于左后间隔记录到分支电位或心动过速时V波最早处消融ILVT成功。结论 :ILVT可以和房室旁路同时存在并导致室房 1∶1传导。 相似文献
18.
以射频电流对81例预激综合征伴阵发性室上性心动过速患者的房室旁路进行消蚀。76例(93.8%)患者的83条旁路(94.3%)被阻断。平均放电12次,平均消蚀时程2.3小时,随访7个月,2例(2.5%)复发但成功地进行第二次消蚀,无严重并发症。 相似文献