Cardiac Cycle Flashcards
contraction of the atria
Atrial systole
contraction of the ventricles
Systole
relaxation of the atria
Atrial diastole
relaxation of the ventricles
Diastole
AV (Atrioventricular Valve) valves close
During Systole
Pressure increases in the ventricles
During Systole
Semilunar valves are forced to open
During Systole
Blood flows into the aorta and pulmonary trunk
During Systole
Pressure in the ventricles decreases
Beginning of Diastole
Semilunar valves closes to prevent backflow of blood
Beginning of Diastole
The first heart sound is represented by the syllable
lubb
the second heart sound is represented by
dupp
First sound occurs at the beginning of ventricular systole as
Atrioventricular (AV) valves close
Second sound occurs when semilunar valves close at the beginning of
ventricular diastole
allow blood to flow in the opposite direction from what is supposed to happen.
Incompetent heart valves