Heart Valves Flashcards
Enables blood to flow from atria into ventricles and prevent backflow of blood.
Atrioventricular valves (AV valves) or (Tricuspid and Bicuspid valves).
Tendinous cords that connect AV valve leaflets to papillary muscles.
Chordae tendineae.
This valve has three leaflets, and is located between the right atrium and right ventricle.
Tricuspid (AV) valve.
What happens to the tricuspid valve when atrial pressure exceeds ventricular pressure?
The valve opens allowing blood to flow into the right ventricle. (Diastole)
What happens to the tricuspid valve when atrial pressure is less than ventricular pressure?
The valve closes, preventing retrograde return of blood from the right ventricle in the right atrium. (Systole)
This valve has two leaflets, and is located between the left atrium and left ventricle.
Bicuspid (AV/Mitral) valve.
What happens to the bicuspid valve when atrial pressure exceeds ventricular pressure?
The valve opens allowing blood to flow into the left ventricle. (Diastole)
What happens to the bicuspid valve when atrial pressure is less than ventricular pressure?
The valve closes, preventing retrograde return of blood from the left ventricle in the left atrium. (Systole)
Enables blood to flow from the ventricles into the pulmonary and systemic circulations.
Semilunar valves.
This valve lies between the right ventricle and the pulmonary trunk.
Pulmonary valve.
What happens to the pulmonary valve when ventricular pressure exceeds pulmonary trunk pressure?
The pulmonary valve opens, forcing blood to flow into the pulmonary trunk. (Systole)
What happens to the pulmonary valve when ventricular pressure is less than pulmonary trunk pressure?
The pulmonary valve closes, preventing retrograde return of blood from the pulmonary trunk back into the right ventricle. (Diastole)
This valve lies between the left ventricle and the aorta.
Aortic valve.
What happens to the aortic valve when ventricular pressure exceeds the pressure in the ascending aorta?
The aortic valve opens, forcing blood to flow into the ascending aorta. (Systole)
What happens to the aortic valve when ventricular pressure is less than the pressure in the ascending aorta?
The aortic valve closes, preventing retrograde return of blood from the ascending aorta back into the left ventricle. (Diastole)
