心脏解剖心脏传导系统.pptVIP

IVC Right Auricle (or) Right Atrial Appendage IVC Crista Terminalis Tendon of Todaro Eustachian Ridge 点 CS窦口 His 束 边缘 Todaro氏腱 三尖瓣环 IVC Fossa Ovalis 左心房 在左心室收缩期充盈 接受来自肺静脉的血液 动脉血 肺静脉 Right Superior Right Inferior Left Superior Left Inferior Left Atrial Appendage Great Cardiac Vein ? Coronary Sinus Fossa Ovalis 概述 左右心室间以室间隔相隔 分流入道和流出道 左心室 接受来自左心房的血液 将血液泵入主动脉 (Ao)，至全身组织 左心室室壁厚于右心室 右心室 接受来自右心房的血液 将血液泵入肺动脉 Viewed from above 右心室 Tricuspid Valve Right Ventricular Outflow Tract (RVOT) Pulmonic Valve Moderator Band Bicuspid/Mitral Valve Aortic Valve 心外膜 最外层Outermost layer 薄层，浆膜Thin, serous membrane 心肌层Myocardium 中层Middle layer 工作心肌Working muscle of heart 心内膜Endocardium 最内层Innermost layer Lines myocardium 心包Pericardium 心包腔Pericardial Sac 内含少量浆膜液Small amount of liquid 纤维骨架 分离心房和心室 为心脏瓣膜提供框架 只允许血液从心房单向流向心室 三尖瓣连接 RA 和 RV 二尖瓣连接 LA和 LV 心室压力低于心房压力时，房室瓣开放 心脏收缩期 心脏舒张期 * Superior Vena Cava – Vein that returns blood from the head, neck and upper limbs back to the right atrium. Inferior Vena Cava – Vein that returns the blood from the internal organs, feet and lower limbs back to the right atrium. Crista Terminalis – The crista terminalis is a vertical ridge of smooth myocardium within the right atrium of the heart. It is on the lateral wall of the chamber. It extends between the right side of the orifice of the superior vena cava inferiorly to the right side of the valve of the inferior vena cava. It marks the dividing line between the posterior, smooth sinus venarum - the remains of the developmental right horn of the sinus venosus - and the anterior, rough part of the right atrium - the original auricular chamber of the embryo. It forms from the superior part of the right venous valve where the sinus venosus enters the right atrium. The sinuatrial node is within the upper part of the crista terminalis. On the external surface of the heart, the crista terminalis occasionally is represented as the sulcus terminalis. Medial (Septal) cusp of Tricuspid Valve – Valve ha