MEDSURG CARDIAC EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WELL VERIFIED .GRADED A+

MEDSURG CARDIAC EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS WELL VERIFIED
.GRADED A+




Arteries carry - ANSWER -oxygenated blood away from the heart


Veins carry - ANSWER -deoxygenated blood



Depolarization - ANSWER -Contraction of the heart (systole)



Repolarization - ANSWER -Relaxation of the heart (diastole)

,effective refractory period - ANSWER -phase in which cells are
incapable of depolarizing


Relative refractory period - ANSWER -phase in which cells require
stronger-than-normal stimulus to depolarize


Cardiac cycle - ANSWER -A complete heartbeat consisting of
contraction and relaxation of both atria and both ventricles


V1 lead placement - ANSWER -right side of the sternum, between 4th
and 5th ribs


V2 lead placement - ANSWER -left side of the sternum across from V1


V3 lead placement - ANSWER -halfway between V2 and V4


V4 lead placement - ANSWER -between the 5th and 6th ribs in a
straight down line


V5 lead placement - ANSWER -Between V4 and V6

, V6 lead placement - ANSWER -horizontally even with V4 in a straight
line down from the middle of the armpit


Cardiac output - ANSWER -the amount of blood pumped by the heart
per minute


Ejection fraction - ANSWER -measurement of the volume percentage
of left ventricular contents ejected with each contraction


Ejection fraction range - ANSWER -50-70%


Cardiac output equation - ANSWER -CO = HR x SV



Stroke volume equation - ANSWER -end diastolic volume - end systolic
volume


Preload - ANSWER -degree of stretch of the cardiac muscle fibers at the
end of diastole


Afterload - ANSWER -the amount of resistance to ejection of blood
from the ventricle