NURS 3220 Lecture Notes - Lecture 20: Coronary Circulation, Mitral Valve, Systolic Geometry
Document Summary
Review of anatomy and physiology: 4 chambers, left atrium, left ventricle, right atrium, right ventricle. Systole: ventricles contract, pulmonary valve open, aortic valve open, mitral valve closed, tricuspid valve closed. Diastole: chambers relax to allow filling, tricuspid valve open, mitral valve open, pulmonary valve closed, aortic valve closed. Coronary artery sinus: aorta is also a tricuspid valve, each cusp provides a pool (via retrograde perfusion) of blood to supply the coronary arteries, occurs during diastole. Coronary arteries: left: divides in two, anterior descending, circumflex, right, coronary artery. Cardiac output: stroke volume x heart rate, stroke volume: influenced by, systemic blood volume (preload, systemic, peripheral resistance (afterload)
