AACN CSC Review Course Session 1 2023 verified

AACN CSC Review Course Session 1 2023 verified70% at rest the myocardium extracts ___% of available oxygen 30-35% normal SvO2 in heart 60-80% normal SvO2 in body coronary perfusion pressure DBP - LVEDP > 40 mmHg normal coronary perfusion pressure auto-regulation coronary circulation is a constant due to _______________________. aortic the coronary arteries originate behind the respective ________ valve leaflets left main coronary artery bifurcates into the LAD and Cx arteries; 2-5cm long; not grafted directly PA and aorta the left main is inaccessible without dividing the _____ and _____ left main, circumflex, RCA what are the 3 main segments of the coronary circulation circumflex artery coronary artery that courses AV groove beneath LAA; has obtuse marginal branches LAD supplies anterior wall, ant 2/3 septum, post/inf LBB, bundle of his; RBB, LV apex