Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
AACN CSC Review Course Session 1
Exam Questions and Answers
70% - ANSWER✔✔-at rest the myocardium extracts ___% of available oxygen
30-35% - ANSWER✔✔-normal SvO2 in heart
60-80% - ANSWER✔✔-normal SvO2 in body
coronary perfusion pressure - ANSWER✔✔-DBP - LVEDP
> 40 mmHg - ANSWER✔✔-normal coronary perfusion pressure
auto-regulation - ANSWER✔✔-coronary circulation is a constant due to _______________________.
aortic - ANSWER✔✔-the coronary arteries originate behind the respective ________ valve leaflets
left main coronary artery - ANSWER✔✔-bifurcates into the LAD and Cx arteries; 2-5cm long; not grafted
directly
PA and aorta - ANSWER✔✔-the left main is inaccessible without dividing the _____ and _____
left main, circumflex, RCA - ANSWER✔✔-what are the 3 main segments of the coronary circulation
circumflex artery - ANSWER✔✔-coronary artery that courses AV groove beneath LAA; has obtuse
marginal branches
LAD - ANSWER✔✔-supplies anterior wall, ant 2/3 septum, post/inf LBB, bundle of his; RBB, LV apex
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Cx artery - ANSWER✔✔-supplies SA node (45%), AV node (10%), inferior LV, lateral LV wall, LA, post/inf
LBB
tertiary left main - ANSWER✔✔-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 - ANSWER✔✔-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 - ANSWER✔✔-coronary artery that arises from aorta and courses AV groove; bifurcates at junction
of RA and LA
lead I - ANSWER✔✔-lead that looks at Cx artery from left arm to right arm
lead II - ANSWER✔✔-lead that looks at RCA from left leg to right arm
lead III - ANSWER✔✔-lead that looks at RCA from left leg to left arm
V1 and V2 - ANSWER✔✔-EKG leads that look at LAD at the septum
V3 and V4 - ANSWER✔✔-leads that look at LAD at the anterior wall
V5 and V6 - ANSWER✔✔-leads that look at the Cx artery at LV lateral wall
Left main - ANSWER✔✔-60% of patients with ____________ lesions also have lessons of other coronary
arteries, commonly triple vessel disease.
70% - ANSWER✔✔-ischemia-induced VT is caused by ___% stenosis of a major non-left main coronary
artery.
left main - ANSWER✔✔-aka the Widowmaker
Copyright ©Stuvia International BV 2010-2024 Page 2/7
AACN CSC Review Course Session 1
Exam Questions and Answers
70% - ANSWER✔✔-at rest the myocardium extracts ___% of available oxygen
30-35% - ANSWER✔✔-normal SvO2 in heart
60-80% - ANSWER✔✔-normal SvO2 in body
coronary perfusion pressure - ANSWER✔✔-DBP - LVEDP
> 40 mmHg - ANSWER✔✔-normal coronary perfusion pressure
auto-regulation - ANSWER✔✔-coronary circulation is a constant due to _______________________.
aortic - ANSWER✔✔-the coronary arteries originate behind the respective ________ valve leaflets
left main coronary artery - ANSWER✔✔-bifurcates into the LAD and Cx arteries; 2-5cm long; not grafted
directly
PA and aorta - ANSWER✔✔-the left main is inaccessible without dividing the _____ and _____
left main, circumflex, RCA - ANSWER✔✔-what are the 3 main segments of the coronary circulation
circumflex artery - ANSWER✔✔-coronary artery that courses AV groove beneath LAA; has obtuse
marginal branches
LAD - ANSWER✔✔-supplies anterior wall, ant 2/3 septum, post/inf LBB, bundle of his; RBB, LV apex
Copyright ©Stuvia International BV 2010-2024 Page 1/7
, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
Cx artery - ANSWER✔✔-supplies SA node (45%), AV node (10%), inferior LV, lateral LV wall, LA, post/inf
LBB
tertiary left main - ANSWER✔✔-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 - ANSWER✔✔-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 - ANSWER✔✔-coronary artery that arises from aorta and courses AV groove; bifurcates at junction
of RA and LA
lead I - ANSWER✔✔-lead that looks at Cx artery from left arm to right arm
lead II - ANSWER✔✔-lead that looks at RCA from left leg to right arm
lead III - ANSWER✔✔-lead that looks at RCA from left leg to left arm
V1 and V2 - ANSWER✔✔-EKG leads that look at LAD at the septum
V3 and V4 - ANSWER✔✔-leads that look at LAD at the anterior wall
V5 and V6 - ANSWER✔✔-leads that look at the Cx artery at LV lateral wall
Left main - ANSWER✔✔-60% of patients with ____________ lesions also have lessons of other coronary
arteries, commonly triple vessel disease.
70% - ANSWER✔✔-ischemia-induced VT is caused by ___% stenosis of a major non-left main coronary
artery.
left main - ANSWER✔✔-aka the Widowmaker
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