CORRECT ANSWERS
an echocardiogram exam begins with PLAX view. where is PLAX located
along? - correct answer- left sternal border
another name for epicardium - correct answer- visceral pericardium
Average propagation speed of sound through soft tissue - correct
answer- 1.54 mm/ms
cardiac valves - correct answer- do not open and close as a result of
electrical stimulus
Cephaled - correct answer- toward head
Deoxygenated blood first enters what chamber of the heart? - correct
answer- right atrium
during diastole - correct answer- AV valves open, semilunar valves
closed, ventricular filling occurs
, During rapid filling phase - correct answer- pressure in the aorta is
greater than ventricle pressure
During systole - correct answer- semilunar valves open, av valves
closed
during the isovolumic periods - correct answer- all 4 cardiac valves
are closed allowing blood volume to remain constant
ejection fraction - correct answer- amount of blood ejected out of
ventricle with each contraction
ejection fraction range - correct answer- 52% - 72%
EKGs R wave helps identify what when measuring in m mode - correct
answer- IVCT
hearts natural pacemaker - correct answer- SA node
How does the left atrium lie to the left ventricle - correct answer-
superior
how many pulmonary veins are there that empty blood into LA -
correct answer- 4