Atrial pressure is greater than ventricular pressure during this phase of the cardiac cycle: A. atrial contraction.
Cardiac cycle can be defined as a complete heartbeat of the mammalian heart, which typically comprises sequential alternating contraction and relaxation of the atria and ventricles, in order to cause oxygenated blood to flow unidirectionally (one direction) throughout the human body.
Generally, the cardiac cycle occurs in two (2) phases;
- Diastole: in this phase, the ventricles is relaxed and would be filled with oxygenated blood.
- Systole: at this phase, the muscles contracts, allowing oxygenated blood to be pushed through the atria.
During atrial contraction, atrial pressure is typically greater than ventricular pressure generated when the cardiac cycle takes place.
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