©BRAINBARTER 2024/2025
AACN CSC Review Course Session 1
Questions With 100% Verified Answers
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
, ©BRAINBARTER 2024/2025
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
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 - answer✔RCA
coronary artery that arises from aorta and courses AV groove; bifurcates at junction of RA and
LA - answer✔RCA
lead that looks at Cx artery from left arm to right arm - answer✔lead I
lead that looks at RCA from left leg to right arm - answer✔lead II
lead that looks at RCA from left leg to left arm - answer✔lead III
EKG leads that look at LAD at the septum - answer✔V1 and V2
leads that look at LAD at the anterior wall - answer✔V3 and V4
leads that look at the Cx artery at LV lateral wall - answer✔V5 and V6
AACN CSC Review Course Session 1
Questions With 100% Verified Answers
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
, ©BRAINBARTER 2024/2025
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
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 - answer✔RCA
coronary artery that arises from aorta and courses AV groove; bifurcates at junction of RA and
LA - answer✔RCA
lead that looks at Cx artery from left arm to right arm - answer✔lead I
lead that looks at RCA from left leg to right arm - answer✔lead II
lead that looks at RCA from left leg to left arm - answer✔lead III
EKG leads that look at LAD at the septum - answer✔V1 and V2
leads that look at LAD at the anterior wall - answer✔V3 and V4
leads that look at the Cx artery at LV lateral wall - answer✔V5 and V6
