AACN CSC Review Course Session 1 Questions and Answers
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Course
AACN CSC
Institution
AACN CSC
at rest the myocardium extracts ___% of available oxygen
o :## 70%
normal SvO2 in heart
o :## 30-35%
normal SvO2 in body
o :## 60-80%
DBP - LVEDP
o :## coronary perfusion pressure
normal coronary perfusion pressure
o :## > 40 mmHg
coronary circulation is a constant due to _____________...
AACN CSC Review Course Session 1 Questions and
Answers
at rest the myocardium extracts ___% of available oxygen
o :## 70%
normal SvO2 in heart
o :## 30-35%
normal SvO2 in body
o :## 60-80%
DBP - LVEDP
o :## coronary perfusion pressure
normal coronary perfusion pressure
o :## > 40 mmHg
coronary circulation is a constant due to _______________________.
o :## auto-regulation
the coronary arteries originate behind the respective ________ valve leaflets
, 2024/2025 2|Page
o :## aortic
bifurcates into the LAD and Cx arteries; 2-5cm long; not grafted directly
o :## left main coronary artery
the left main is inaccessible without dividing the _____ and _____
o :## PA and aorta
what are the 3 main segments of the coronary circulation
o :## left main, circumflex, RCA
coronary artery that courses AV groove beneath LAA; has obtuse marginal branches
o :## circumflex artery
supplies anterior wall, ant 2/3 septum, post/inf LBB, bundle of his; RBB, LV apex
o :## LAD
supplies SA node (45%), AV node (10%), inferior LV, lateral LV wall, LA, post/inf LBB
o :## Cx artery
3 vessels of equal diameter between LAD and Cx; supplies large area of LV b/t LAD
and Cx arteries; usually subepicardial; may give pt a perfusion advantage
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