AACN CSC Review Course Session 1
2025/2026 Exam Questions and Answers
| A+ Score Assured
at rest the myocardium extracts ___% of available oxygen - 🧠 ANSWER
✔✔70%
normal SvO2 in heart - 🧠 ANSWER ✔✔30-35%
normal SvO2 in body - 🧠 ANSWER ✔✔60-80%
DBP - LVEDP - 🧠 ANSWER ✔✔coronary perfusion pressure
normal coronary perfusion pressure - 🧠 ANSWER ✔✔> 40 mmHg
coronary circulation is a constant due to _______________________. - 🧠
ANSWER ✔✔auto-regulation
, the coronary arteries originate behind the respective ________ valve
leaflets - 🧠 ANSWER ✔✔aortic
bifurcates into the LAD and Cx arteries; 2-5cm long; not grafted directly - 🧠
ANSWER ✔✔left main coronary artery
the left main is inaccessible without dividing the _____ and _____ - 🧠
ANSWER ✔✔PA and aorta
what are the 3 main segments of the coronary circulation - 🧠 ANSWER
✔✔left main, circumflex, RCA
coronary artery that courses AV groove beneath LAA; has obtuse marginal
branches - 🧠 ANSWER ✔✔circumflex artery
supplies anterior wall, ant 2/3 septum, post/inf LBB, bundle of his; RBB, LV
apex - 🧠 ANSWER ✔✔LAD
supplies SA node (45%), AV node (10%), inferior LV, lateral LV wall, LA,
post/inf LBB - 🧠 ANSWER ✔✔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 - 🧠 ANSWER ✔✔tertiary left main
2025/2026 Exam Questions and Answers
| A+ Score Assured
at rest the myocardium extracts ___% of available oxygen - 🧠 ANSWER
✔✔70%
normal SvO2 in heart - 🧠 ANSWER ✔✔30-35%
normal SvO2 in body - 🧠 ANSWER ✔✔60-80%
DBP - LVEDP - 🧠 ANSWER ✔✔coronary perfusion pressure
normal coronary perfusion pressure - 🧠 ANSWER ✔✔> 40 mmHg
coronary circulation is a constant due to _______________________. - 🧠
ANSWER ✔✔auto-regulation
, the coronary arteries originate behind the respective ________ valve
leaflets - 🧠 ANSWER ✔✔aortic
bifurcates into the LAD and Cx arteries; 2-5cm long; not grafted directly - 🧠
ANSWER ✔✔left main coronary artery
the left main is inaccessible without dividing the _____ and _____ - 🧠
ANSWER ✔✔PA and aorta
what are the 3 main segments of the coronary circulation - 🧠 ANSWER
✔✔left main, circumflex, RCA
coronary artery that courses AV groove beneath LAA; has obtuse marginal
branches - 🧠 ANSWER ✔✔circumflex artery
supplies anterior wall, ant 2/3 septum, post/inf LBB, bundle of his; RBB, LV
apex - 🧠 ANSWER ✔✔LAD
supplies SA node (45%), AV node (10%), inferior LV, lateral LV wall, LA,
post/inf LBB - 🧠 ANSWER ✔✔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 - 🧠 ANSWER ✔✔tertiary left main
