心臟血管系統(tǒng)ppt課件-在線瀏覽
2025-02-22 09:34本頁面
【正文】 interventricular septum beneath the endocardium. It usually divides into two branches, which eventually bee continuous with the Purkinje fibers Purkinje fibers 普肯野氏纖維 － continuous with myocardium Arterial supply Left coronary artery 左冠狀動脈 ? Arises from left aortic sinus ? Runs between pulmonary trunk and left auricle into coronary sulcus ? Branches ? Anterior interventricular branch 前室間支－ travels downward in anterior interventricular groove around inferior margin of heart to posterior interventricular groove ? Circumflex branch 旋支 － travels to left in coronary sulcus to posterior aspect ? Distribution－ supplies left atrium and ventricle, lesser portion of anterior wall of right ventricle, and anterior 2/3 of interventricular septum Right coronary artery 右冠狀動脈 ? Arises from the right aortic sinus ? Runs forward between right auricle and pulmonary trunk into coronary sulcus ? Branches ? Right marginal branch 右緣支 － travels along inferior bord ? Posteror interventricular branch 后室間支 － travels downward in posterior interventricular groove, it anastomosises near the apex with the anteriorinterventricular branch of the left coronary artery ? Distribution: supplies right atrium and ventricle, posterior 1/3 of interventricular septum, posterior wall of left ventricle, the sinuatrial node and atrioventricular node Venous drainage Coronary sinus 冠狀竇 ? Located in posterior part of coronary sinus ? Carries most of venous blood from myocardium to right atrium ? Tributaries ? Great cardiac vein 心大靜脈 ? Middle cardiac vein 心中靜脈 ? Small cardiac vein 心小靜脈 ? Anterior cardiac veins 心前靜脈 － 3~4 small vessels, drain into right atrium ? Smallest cardiac veins 心最小靜脈 －drain into all chambers, mainly atria Pericardium 心包 Fibrous pericardium 纖維心包 ? Attached to central tendon of diaphragm inferiorly ? Blends with outer coat of great vessels superiorly Serous pericardium 漿膜心包 ? Visceral pericardium (epicardium) ? Parietal pericardium Pericardial cavity 心包腔 ? Potential space between visceral and parietal pericardium ? Contains film of pericardium fluid Pericardium sinus ? Transverse sinus of pericardium 心包橫竇 － posterior to ascending aorta and pulmonary trunk, anterior to superior vena cava and left atrium. ? Oblique sinus of pericardium 心包斜竇 － culdesac , posterior to heart, bounded by pulmonary veins on either side Surface markings of heart ? Right border－ corresponds to a line running from the upper border of right third costal cartilage 177。 from sternal margin ? Lower border－represented by a line joint the lower end of right border to apex Dissection of the heart The Arteries Characteristics ? Symmetry 對稱 ? In the trunk of the body consist parietal and visceral branches 壁支和臟支 ? Shortest possible course ? Run on flexor surfaces ? Usually do not pass directly through muscles, avoiding pression ? Together with the veins and nerves in a sheath of fascia to form neurovascular bundle 血管神經(jīng)束 Arteries of pulmonary circulation 肺循環(huán)的動脈 Pulmonary trunk 肺動脈干 ? Arises from right ventricle ? Runs up, back ,and to the left ? Bifurcates
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