Cardiovascular System: Cardiac Cycle
1. Which wave of the electrocardiogram (ECG) precedes isovolumetric relaxation?
T-wave
2. During which phase is there a decrease in the volume of the ventricles?
Ventricular ejection
3. During which phase of the cardiac cycle is the pressure in the left ventricle higher than the
pressure in the aorta?
Ventricular ejection
4. The phase of the cardiac cycle where the ventricles are in systole but there is no change in
ventricular volume is called _________________________.
Isovolumetric contraction
5. Closure of the atrioventricular valves marks the beginning of which phase of the cardiac
cycle?
Isovolumetric contraction
6. Name the phase when the atrioventricular valves and the semilunar valves are all closed
during ventricular diastole.
Isovolumetric relaxation
7. What pressure condition must be met for the mitral valve to open?
Left atrial pressure must be greater than left ventricular pressure
1. Which wave of the electrocardiogram (ECG) precedes isovolumetric relaxation?
T-wave
2. During which phase is there a decrease in the volume of the ventricles?
Ventricular ejection
3. During which phase of the cardiac cycle is the pressure in the left ventricle higher than the
pressure in the aorta?
Ventricular ejection
4. The phase of the cardiac cycle where the ventricles are in systole but there is no change in
ventricular volume is called _________________________.
Isovolumetric contraction
5. Closure of the atrioventricular valves marks the beginning of which phase of the cardiac
cycle?
Isovolumetric contraction
6. Name the phase when the atrioventricular valves and the semilunar valves are all closed
during ventricular diastole.
Isovolumetric relaxation
7. What pressure condition must be met for the mitral valve to open?
Left atrial pressure must be greater than left ventricular pressure
