Cardiac Physiology: Pump Function & Heart Valves Flashcards
The (left/right) heart feeds the pulmonary circulation
right
The (left/right) heart feeds the systemic circulation
left
What valve is between the right atria and right ventricle?
Tricuspid
What valve is between the left atria and left ventricle?
Mitral
What are the semilunar valves?
Pulmonary and aortic valve
What are the AV valves?
Tricuspid and Mitral
Arteries transfer oxygenated blood while veins transfer deoxygenated blood. What artery/vein does not follow this?
Pulmonary artery/veins of heart
Which coronary artery supplies oxygen to the bottom portion of both ventricles and back of septum?
Right coronary
The right coronary artery supples oxygen where?
Botton of both ventricles and back of septum
Which coronary artery supplies oxygen to the front and bottom of left of left ventricle and front of septum?
Left coronary
The left coronary artery supplies oxygen where?
Front and bottom of left ventricle and front of septum
When all valves are closed, ventricular volume is constant and the phase is called…?
Isovolumetric
The P wave of the electrocardiogram is represented as..
Atrial systole Isovolumic contraction Ejection Isovolumic relaxation Rapid inflow
Atrial systole
When do the A-V valves close during the cardiac cycle?
When isovolumic contraction begins
When do the aortic valves open during the cardiac cycle?
When isovolumic contraction ends
When do the A-V valves open during the cardiac cycle?
When isovolumic relaxation ends
When do the aortic valves close during the cardiac cycle?
When isovolumic relaxation begins
During isovolumic contraction, what happens to aortic and ventricular pressure?
Pressure goes up for both. Ventricular pressure significantly rises from its original spot
During isovolumic contraction, what happens to ventricular volume?
Doesn’t change
What kind of pressure in the cardiac cycle stay almost constant?
Atrial pressure
What happens to both aortic and ventricular pressure during ejection of cardiac cycle?
Both rise, peak, then decrease
During isovolumic relaxation, what happens to both aortic and ventricular pressure?
Aortic pressure barely increases, but ventricular pressure decreases significantly
During ejection, what happens to ventricular volume?
Decreases significantly
During isovolumic relaxation, what happens to ventricular volume?
Doesn’t change
During diastole (rapid inflow) what happens to aortic and ventricular pressure?
Aortic pressure decreases gradually until next isovolumic contraction, but ventricular pressure stays constant until next atrial systole
What happens to ventricular pressure during atrial systole?
Increases slightly
What happens to ventricular volume during atrial systole?
Increases slightly
Isovoumetric ventricular contraction begins after the onset of ____ wave
QRS
First heart sound is after _______
closure of AV valves
Isovolumetric ventricular relaxation is at the end of ___ wave
T
How do you calculate mean arterial pressure?
2/3 diastolic pressure + 1/3 systolic pressure
How do you calculate pulse pressure
Difference between systolic and diastolic pressure
How do you calculate cardiac output?
Stroke volume * heart rate
How do you calculate ejection fraction?
Stroke volume / end diastolic volume
