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AACN CSC Review Course Session 1
Questions and Correct Answers
at rest the myocardium extracts ___% of available oxygen Ans:
70%
normal SvO2 in heart Ans: 30-35%
normal SvO2 in body Ans: 60-80%
DBP - LVEDP Ans: coronary perfusion pressure
normal coronary perfusion pressure Ans: > 40 mmHg
coronary circulation is a constant due to _______________________.
Ans: auto-regulation
the coronary arteries originate behind the respective ________ valve
leaflets Ans: aortic
bifurcates into the LAD and Cx arteries; 2-5cm long; not grafted
directly Ans: left main coronary artery
the left main is inaccessible without dividing the _____ and _____
Ans: PA and aorta
what are the 3 main segments of the coronary circulation Ans: left
main, circumflex, RCA
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coronary artery that courses AV groove beneath LAA; has obtuse
marginal branches Ans: circumflex artery
supplies anterior wall, ant 2/3 septum, post/inf LBB, bundle of his;
RBB, LV apex Ans: LAD
supplies SA node (45%), AV node (10%), inferior LV, lateral LV wall,
LA, post/inf LBB Ans: 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 Ans: 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
Ans: RCA
coronary artery that arises from aorta and courses AV groove;
bifurcates at junction of RA and LA Ans: RCA
lead that looks at Cx artery from left arm to right arm Ans: lead I
lead that looks at RCA from left leg to right arm Ans: lead II
lead that looks at RCA from left leg to left arm Ans: lead III
EKG leads that look at LAD at the septum Ans: V1 and V2
leads that look at LAD at the anterior wall Ans: V3 and V4
© 2025 All rights reserved
AACN CSC Review Course Session 1
Questions and Correct Answers
at rest the myocardium extracts ___% of available oxygen Ans:
70%
normal SvO2 in heart Ans: 30-35%
normal SvO2 in body Ans: 60-80%
DBP - LVEDP Ans: coronary perfusion pressure
normal coronary perfusion pressure Ans: > 40 mmHg
coronary circulation is a constant due to _______________________.
Ans: auto-regulation
the coronary arteries originate behind the respective ________ valve
leaflets Ans: aortic
bifurcates into the LAD and Cx arteries; 2-5cm long; not grafted
directly Ans: left main coronary artery
the left main is inaccessible without dividing the _____ and _____
Ans: PA and aorta
what are the 3 main segments of the coronary circulation Ans: left
main, circumflex, RCA
© 2025 All rights reserved
, 2 | Page
coronary artery that courses AV groove beneath LAA; has obtuse
marginal branches Ans: circumflex artery
supplies anterior wall, ant 2/3 septum, post/inf LBB, bundle of his;
RBB, LV apex Ans: LAD
supplies SA node (45%), AV node (10%), inferior LV, lateral LV wall,
LA, post/inf LBB Ans: 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 Ans: 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
Ans: RCA
coronary artery that arises from aorta and courses AV groove;
bifurcates at junction of RA and LA Ans: RCA
lead that looks at Cx artery from left arm to right arm Ans: lead I
lead that looks at RCA from left leg to right arm Ans: lead II
lead that looks at RCA from left leg to left arm Ans: lead III
EKG leads that look at LAD at the septum Ans: V1 and V2
leads that look at LAD at the anterior wall Ans: V3 and V4
© 2025 All rights reserved
