AACN CSC Exam Review Course
Session 1 Questions with 100% Correct
Answers | Rated A+
70% - ✔✔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
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, 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
Cx artery - ✔✔supplies SA node (45%), AV node (10%), inferior LV, lateral
LV wall, LA, post/inf LBB
tertiary left main - ✔✔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
RCA - ✔✔supplies SA node (55%), AV node (90%), bundle of his, RA and
RV, inferior LV, post. 1/3 of septum, post/inf division of left bundle
RCA - ✔✔coronary artery that arises from aorta and courses AV groove;
bifurcates at junction of RA and LA
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
Session 1 Questions with 100% Correct
Answers | Rated A+
70% - ✔✔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
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, 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
Cx artery - ✔✔supplies SA node (45%), AV node (10%), inferior LV, lateral
LV wall, LA, post/inf LBB
tertiary left main - ✔✔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
RCA - ✔✔supplies SA node (55%), AV node (90%), bundle of his, RA and
RV, inferior LV, post. 1/3 of septum, post/inf division of left bundle
RCA - ✔✔coronary artery that arises from aorta and courses AV groove;
bifurcates at junction of RA and LA
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
