Anatomy and Phys Flashcards
(21 cards)
where is the mitral valve/HS 1 best heard
5th ICS
L PMI midclavicular line
where is S2 best heard
2nd ICS
R sternal border
where is S1 best heard
2nd ICS L sternal border
where is erbs point
3rd ICS L sternal border
what is heard at erbs point
tricuspid heart sound
where is tricuspid heart sound heard
3rd ICS L sternal border
what occurs if the fossa ovalis is damaged or lost
turbulent blood flow
potential clot and stroke can occur
what occurs if infundibulum is lost
reduced blood velocity
what can’t you do if there is reduced blood velocity
can’t exercise hard b/c blood will pool –> R CHF
which coronary artery is the worse side for MI
L main coronary artery
right main coronary artery supplies the…
AV node
in how much of the population does the R main coronary artery supply the SA node
55%
last 20% of ventricular filling is ejected via
atrial kick
diastolic volume
amount of blood in ventricles prior to systole (contraction)
isovolumetric contraction
atrium volume/pressure is high
but valve does not open despite ventricle contracting
end-systolic volume
amount of blood remaining after contraction
ejection fraction
% of blood volume in the ventricles at the end of diastole that is ejected during systole
what is ejection fraction a measurement of
contractility
ejection fraction equation
SV/EDV
normal ejection fraction
greater than 60-65%
what drug increases the contractility of the heart
digitalis
