In order to improve the efficacy of modified inferior method or middle method of radiofrequency catheter ablation (RFCA) in the treatment of atrioventricular node reentrant tachycardia (AVNRT), the clinical data of 3...In order to improve the efficacy of modified inferior method or middle method of radiofrequency catheter ablation (RFCA) in the treatment of atrioventricular node reentrant tachycardia (AVNRT), the clinical data of 325 cases of AVNRT from March 1992 to Feb. 2000 being subjected to the treatment of RFCA were retrospectively analyzed. The results showed that the successful rate was increased and recurrence was decreased year by year. In the recent 4 years the effective rate was up to 100 %. The complication of three grade of AVB occurred in 3 % and recurrent rate in 9.1 % before March 1996, but both of them were zero in the last 3 years. The time of RFCA procedure and X ray exposure was significantly reduced. It was concluded that ablating more than 3 targets by modified inferior method or middle method with energy titrating and strict endpoint was the crux of obtaining satisfactory therapeutic effects and preventing recurrence.展开更多
A series of related electrophysiology phenomena can be caused by the occurrence of interpolated ventricular premature contraction.In our recent three-dimensional Lorenz R-R scatter plot research,we found that atrioven...A series of related electrophysiology phenomena can be caused by the occurrence of interpolated ventricular premature contraction.In our recent three-dimensional Lorenz R-R scatter plot research,we found that atrioventricular node double path caused by interpolated ventricular premature contraction imprints a specifi c pattern on three-dimensional Lorenz plots generated from 24-hour Holter recordings.We found two independent subclusters separated from the interpolated premature beat precluster,the interpolated premature beat cluster,and the interpolated premature beat postcluster,respectively.Combined with use of the trajectory tracking function and the leap phenomenon,our results reveal the presence of the atrioventricular node double conduction path.展开更多
The objective of the work is to study the topographic and anatomical characteristics of the atrioventricular node’s artery in complex congenital heart defects.The material for the work was the following:44 specimens ...The objective of the work is to study the topographic and anatomical characteristics of the atrioventricular node’s artery in complex congenital heart defects.The material for the work was the following:44 specimens including hearts of fetuses and children of the first three years having congenital defects and 50 specimens of the hearts of a similar age with normal development as the control.A complex of generally accepted morphological methods was used to identify the conductive system of the heart,its blood supply.According to the data obtained given congenital heart defects,the artery of the atrioventricular node arises from an artery,that determines the type of blood supply to the heart.With the full form of the common atrioventricular canal,the presence of the“U”-shaped bend of the coronary artery at the point of departure of the atrioventricular artery from it is inconstant,which is apparently due to the localization of the atrioventricular node in the embryonic position.The intensity of the lateral branches from the artery of the atrioventricular node to the heart partitions is determined by the hemodynamic features with congenital heart defects.展开更多
Cystic tumour of the atrioventricular node is a rare primary cardiac tumour that can cause complete heart block and sudden death. Here, we describe a male case aged 42 years who suddenly died without a medical and fam...Cystic tumour of the atrioventricular node is a rare primary cardiac tumour that can cause complete heart block and sudden death. Here, we describe a male case aged 42 years who suddenly died without a medical and family history of cardiac illnesses. After detailed macroscopic and microscopic examinations, a cystic mass was found in the atrioventricular nodal region. The small lesion was less than 1 cm in diameter, and consisted of small and large cystic spaces and tubular structures lined by flat, cuboidal or squamous epithelium. Immunohistochemical staining revealed the tumour epithelium positive for epithelial membrane antigen, carcinoembryonic antigen, antigen epitopes AEI/AE3, cytokeratins CK5/6 and CK7, but negative for calretinin, HBME-1, Wilms＇ tumor 1, factor VⅢ, chromogranin, synaptophysin or smooth muscle actin, suggesting an endodermal rather than mesothelial origin.展开更多
目的:探索希氏束-浦肯野传导系统起搏[HPCSP,包括希氏束起搏(HBP)和左束支区域起搏(LBBAP)]联合房室结消融治疗心房颤动(房颤)合并心力衰竭(心衰)的有效性及安全性。方法:在PubMed、Cochrane图书馆、Web of Science、Embase、中国知网...目的:探索希氏束-浦肯野传导系统起搏[HPCSP,包括希氏束起搏(HBP)和左束支区域起搏(LBBAP)]联合房室结消融治疗心房颤动(房颤)合并心力衰竭(心衰)的有效性及安全性。方法:在PubMed、Cochrane图书馆、Web of Science、Embase、中国知网、万方数据库、维普网、中华医学期刊全文数据库检索关于HPCSP联合房室结消融治疗房颤合并心衰患者的研究,检索时间为各数据库建库到2024年7月31日。采用纽卡斯尔-渥太华(NOS)量表对纳入的队列研究进行质量评价,使用Cochrane偏倚风险评价方法评估随机对照研究的质量,并用RevMan 5.4、Stata 15.1软件进行Meta分析。结果:共纳入13项研究,共1071例患者。HPCSP联合房室结消融成功率为93.1%。Meta分析结果显示,在有效性方面,与基线相比,随访时患者的左心室舒张末期内径(LVEDD)[均数差(MD)=-3.11,95%CI:-4.16~-2.06,P<0.00001)]及纽约心脏协会(NYHA)心功能分级(MD=-1.36,95%CI:-1.48~-1.24,P<0.00001)明显改善,左心室射血分数(LVEF)(MD=9.86,95%CI:7.02~12.69,P<0.00001)明显提高,房室结消融后,起搏QRS波时限(QRSd)较基线延长(MD=7.83,95%CI:2.79~12.87,P=0.002);在安全性方面,HPCSP术中及随访时的起搏阈值保持稳定(MD=0.07,95%CI:-0.01~0.15,P=0.11),阻抗较围术期明显下降(MD=-78.84,95%CI:-120.21~-37.47,P=0.0002),并发症发生率为7.9%,心衰再住院率为4.5%,死亡率为5.8%。与双心室起搏相比,HPCSP明显缩短起搏QRSd(MD=-39.08,95%CI:-62.35~-15.80,P=0.001),改善随访LVEF(MD=4.38,95%CI:0.37~8.40,P=0.030),二者LVEDD变化(MD=-9.11,95%CI:-19.93~1.72,P=0.100)差异无统计学意义。随访期间,LBBAP起搏阈值低于HBP(MD=0.61,95%CI:0.23~1.00,P=0.002);LBBAP与HBP终点事件发生率差异无统计学意义(RR=1.47,95%CI:0.83~2.60,P=0.190)。结论:HPCSP联合房室结消融治疗房颤合并心衰有效、安全。HPCSP较双心室起搏可更好的促进心电同步并进一步改善患者心功能,LBBAP起搏参数优于HBP。展开更多
Several anatomical,demographic,clinical,electrocardiographic,procedural,and valve-related variables can be used to predict the probability of developing con-duction abnormalities after transcatheter aortic valve repla...Several anatomical,demographic,clinical,electrocardiographic,procedural,and valve-related variables can be used to predict the probability of developing con-duction abnormalities after transcatheter aortic valve replacement(TAVR)that necessitate permanent pacemaker(PPM)implantation.These variables include calcifications around the device landing zone and in the mitral annulus;pre-existing electrocardiographic abnormalities such as left and right bundle branch blocks(BBB),first-and second-degree atrioventricular blocks,as well as bifas-cicular and trifascicular blocks;male sex;diabetes mellitus(DM);hypertension;history of atrial fibrillation;renal failure;dementia;and use of self-expanding valves.The current study supports existing literature by demonstrating that type 2 DM and baseline right BBB are significant predictors of PPM implantation post-TAVR.Regardless of the side of the BBB,this study demonstrated,for the first time,a linear association between the incidence of PPM implantation post-TAVR and every 20 ms increase in baseline QRS duration(above 100 ms).After a 1-year follow-up,patients who received PPM post-TAVR had a higher rate of hospital-ization for heart failure and nonfatal myocardial infarction.展开更多
利用显微镜观察了20例兔心房室结的连续切片。房室结位于冠状窦口前上方,三尖瓣隔瓣的上方,中心纤维体的右侧,形似不规则的三角体。大小为2.81×1.61×0.38mm。有前、中、后三束心房肌分别在房室结的上端、后端和后下端进入结...利用显微镜观察了20例兔心房室结的连续切片。房室结位于冠状窦口前上方,三尖瓣隔瓣的上方,中心纤维体的右侧,形似不规则的三角体。大小为2.81×1.61×0.38mm。有前、中、后三束心房肌分别在房室结的上端、后端和后下端进入结内。房室结主要由 P 细胞和 T 细胞组成,它们分别构成上结区和下结区,后者延续为房室束。副房室结出现率25%,位于房室束穿通部的上方或主动脉根和中心纤维体转折处的房间隔右侧心内膜下。副房室结主要由 P 细胞组成。副结在临床和心电图诊断方面可能有一定的意义。展开更多
文摘In order to improve the efficacy of modified inferior method or middle method of radiofrequency catheter ablation (RFCA) in the treatment of atrioventricular node reentrant tachycardia (AVNRT), the clinical data of 325 cases of AVNRT from March 1992 to Feb. 2000 being subjected to the treatment of RFCA were retrospectively analyzed. The results showed that the successful rate was increased and recurrence was decreased year by year. In the recent 4 years the effective rate was up to 100 %. The complication of three grade of AVB occurred in 3 % and recurrent rate in 9.1 % before March 1996, but both of them were zero in the last 3 years. The time of RFCA procedure and X ray exposure was significantly reduced. It was concluded that ablating more than 3 targets by modified inferior method or middle method with energy titrating and strict endpoint was the crux of obtaining satisfactory therapeutic effects and preventing recurrence.
文摘A series of related electrophysiology phenomena can be caused by the occurrence of interpolated ventricular premature contraction.In our recent three-dimensional Lorenz R-R scatter plot research,we found that atrioventricular node double path caused by interpolated ventricular premature contraction imprints a specifi c pattern on three-dimensional Lorenz plots generated from 24-hour Holter recordings.We found two independent subclusters separated from the interpolated premature beat precluster,the interpolated premature beat cluster,and the interpolated premature beat postcluster,respectively.Combined with use of the trajectory tracking function and the leap phenomenon,our results reveal the presence of the atrioventricular node double conduction path.
文摘The objective of the work is to study the topographic and anatomical characteristics of the atrioventricular node’s artery in complex congenital heart defects.The material for the work was the following:44 specimens including hearts of fetuses and children of the first three years having congenital defects and 50 specimens of the hearts of a similar age with normal development as the control.A complex of generally accepted morphological methods was used to identify the conductive system of the heart,its blood supply.According to the data obtained given congenital heart defects,the artery of the atrioventricular node arises from an artery,that determines the type of blood supply to the heart.With the full form of the common atrioventricular canal,the presence of the“U”-shaped bend of the coronary artery at the point of departure of the atrioventricular artery from it is inconstant,which is apparently due to the localization of the atrioventricular node in the embryonic position.The intensity of the lateral branches from the artery of the atrioventricular node to the heart partitions is determined by the hemodynamic features with congenital heart defects.
基金This study was supported in part by grants from the National Natural Science Foundation of China （No. 81060191） and the Social Development Plan in Yunnan Province Science and Technology （No. 2009CD091）.
文摘Cystic tumour of the atrioventricular node is a rare primary cardiac tumour that can cause complete heart block and sudden death. Here, we describe a male case aged 42 years who suddenly died without a medical and family history of cardiac illnesses. After detailed macroscopic and microscopic examinations, a cystic mass was found in the atrioventricular nodal region. The small lesion was less than 1 cm in diameter, and consisted of small and large cystic spaces and tubular structures lined by flat, cuboidal or squamous epithelium. Immunohistochemical staining revealed the tumour epithelium positive for epithelial membrane antigen, carcinoembryonic antigen, antigen epitopes AEI/AE3, cytokeratins CK5/6 and CK7, but negative for calretinin, HBME-1, Wilms＇ tumor 1, factor VⅢ, chromogranin, synaptophysin or smooth muscle actin, suggesting an endodermal rather than mesothelial origin.
文摘目的:探索希氏束-浦肯野传导系统起搏[HPCSP,包括希氏束起搏(HBP)和左束支区域起搏(LBBAP)]联合房室结消融治疗心房颤动(房颤)合并心力衰竭(心衰)的有效性及安全性。方法:在PubMed、Cochrane图书馆、Web of Science、Embase、中国知网、万方数据库、维普网、中华医学期刊全文数据库检索关于HPCSP联合房室结消融治疗房颤合并心衰患者的研究,检索时间为各数据库建库到2024年7月31日。采用纽卡斯尔-渥太华(NOS)量表对纳入的队列研究进行质量评价,使用Cochrane偏倚风险评价方法评估随机对照研究的质量,并用RevMan 5.4、Stata 15.1软件进行Meta分析。结果:共纳入13项研究,共1071例患者。HPCSP联合房室结消融成功率为93.1%。Meta分析结果显示,在有效性方面,与基线相比,随访时患者的左心室舒张末期内径(LVEDD)[均数差(MD)=-3.11,95%CI:-4.16~-2.06,P<0.00001)]及纽约心脏协会(NYHA)心功能分级(MD=-1.36,95%CI:-1.48~-1.24,P<0.00001)明显改善,左心室射血分数(LVEF)(MD=9.86,95%CI:7.02~12.69,P<0.00001)明显提高,房室结消融后,起搏QRS波时限(QRSd)较基线延长(MD=7.83,95%CI:2.79~12.87,P=0.002);在安全性方面,HPCSP术中及随访时的起搏阈值保持稳定(MD=0.07,95%CI:-0.01~0.15,P=0.11),阻抗较围术期明显下降(MD=-78.84,95%CI:-120.21~-37.47,P=0.0002),并发症发生率为7.9%,心衰再住院率为4.5%,死亡率为5.8%。与双心室起搏相比,HPCSP明显缩短起搏QRSd(MD=-39.08,95%CI:-62.35~-15.80,P=0.001),改善随访LVEF(MD=4.38,95%CI:0.37~8.40,P=0.030),二者LVEDD变化(MD=-9.11,95%CI:-19.93~1.72,P=0.100)差异无统计学意义。随访期间,LBBAP起搏阈值低于HBP(MD=0.61,95%CI:0.23~1.00,P=0.002);LBBAP与HBP终点事件发生率差异无统计学意义(RR=1.47,95%CI:0.83~2.60,P=0.190)。结论:HPCSP联合房室结消融治疗房颤合并心衰有效、安全。HPCSP较双心室起搏可更好的促进心电同步并进一步改善患者心功能,LBBAP起搏参数优于HBP。
文摘Several anatomical,demographic,clinical,electrocardiographic,procedural,and valve-related variables can be used to predict the probability of developing con-duction abnormalities after transcatheter aortic valve replacement(TAVR)that necessitate permanent pacemaker(PPM)implantation.These variables include calcifications around the device landing zone and in the mitral annulus;pre-existing electrocardiographic abnormalities such as left and right bundle branch blocks(BBB),first-and second-degree atrioventricular blocks,as well as bifas-cicular and trifascicular blocks;male sex;diabetes mellitus(DM);hypertension;history of atrial fibrillation;renal failure;dementia;and use of self-expanding valves.The current study supports existing literature by demonstrating that type 2 DM and baseline right BBB are significant predictors of PPM implantation post-TAVR.Regardless of the side of the BBB,this study demonstrated,for the first time,a linear association between the incidence of PPM implantation post-TAVR and every 20 ms increase in baseline QRS duration(above 100 ms).After a 1-year follow-up,patients who received PPM post-TAVR had a higher rate of hospital-ization for heart failure and nonfatal myocardial infarction.
文摘利用显微镜观察了20例兔心房室结的连续切片。房室结位于冠状窦口前上方,三尖瓣隔瓣的上方,中心纤维体的右侧,形似不规则的三角体。大小为2.81×1.61×0.38mm。有前、中、后三束心房肌分别在房室结的上端、后端和后下端进入结内。房室结主要由 P 细胞和 T 细胞组成,它们分别构成上结区和下结区,后者延续为房室束。副房室结出现率25%,位于房室束穿通部的上方或主动脉根和中心纤维体转折处的房间隔右侧心内膜下。副房室结主要由 P 细胞组成。副结在临床和心电图诊断方面可能有一定的意义。
