AACN CSC 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
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
aortic - ANSWER>>severe _______ stenosis increases the risk for post-operative
stroke after a CABG.
ascending aorta - ANSWER>>location where aortic cross-clamping occurs
diastole - ANSWER>>cardioplegia is induced in ______________
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
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
aortic - ANSWER>>severe _______ stenosis increases the risk for post-operative
stroke after a CABG.
ascending aorta - ANSWER>>location where aortic cross-clamping occurs
diastole - ANSWER>>cardioplegia is induced in ______________
