NURS 3664 Lecture Notes - Lecture 7: Pericardium, Heart Valve, Circulatory System
Document Summary
Left ventricular wall 2-3 times thicker than right. How"s my heart? filled ventricle with each heartbeat. Normal adult co / 5l/min at rest, 70 bpm, sv 70 ml. Co and forces opposing blood flow determine bp. Cardiac performance evaluated by measuring cardiac output. Cardiac output: amount of blood pumped by each ventricle in 1 minute (co = sv* x hr) Ejection fraction (echocardiography, ct, mri ); percentage of blood pumped out of. Factors affecting cardiac output (performance of the heart) any back up in the veins response to changes in venous return. Ability of the heart to change its force of contraction and therefore stroke volume in. Co is synchronized with venous return, arterial blood supply. Volume of blood in ventricles at end of diastole. Peripheral resistance against which left ventricle must pump. Chemoreceptors: heart rate, lung sounds, blood pressure, jugular venous distention, a patient is receiving a drug that decreases afterload.
