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