论文部分内容阅读
室性期前收缩源自右心室或左心室的心内膜、心肌中层,或心外膜。右心室流出道(RVOT)是特发性室性期前收缩的最常见部位,其他潜在部位包括左心室流出道(LVOT),传导束,乳头肌,主动脉瓣或心外膜。另外,延伸至半月瓣上达到大动脉近端的心室肌袖也已被确立为心室异位搏动的部位。心室肌袖以环绕形式延伸至肺动脉瓣以上,而延伸至主动脉瓣以上的心肌只沿着右冠状窦和左冠状窦前部分布。
Ventricular premature contraction from the right ventricle or left ventricle of the endocardium, myocardium, or epicardium. Right ventricular outflow tract (RVOT) is the most common site of idiopathic ventricular premature contraction, and other potential sites include left ventricular outflow tract (LVOT), conduction band, papillary muscle, aortic valve or epicardium. In addition, the ventricular sleeves extending to the semilunar valve to the proximal aorta have also been established as ventricular ectopic beats. The ventricular sleeve extends circumferentially above the pulmonary valve, while the myocardium extending above the aortic valve extends only along the right coronary sinus and the anterior portion of the left coronary.