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The contraction phase of the cardiac cycle is called systole. This is when the heart muscle contracts to pump blood out of the heart and into the circulatory system.

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What is the alternating relaxation and contraction of the heart called?

Diastole is the relaxation phase. Systole is the contraction phase. If you put these phases together you have the Cardiac Cycle...


The R wave of the ECG is most closely associated with which phase of the cardiac contraction cycle?

The R wave of the ECG is most closely associated with the depolarization of the ventricles during the cardiac contraction cycle, specifically with the QRS complex. This represents the initiation of ventricular contraction.


During which phase of the cardiac cycle do the ventricles relax and fill with blood?

diastole is when all 4 chambers of the heart are at rest after a cardiac cycle systole is the term used to describe the heart during a contraction


What is the phase of the cardiac cycle that is caused by the sliding of actin and myosin?

The phase of the cardiac cycle caused by the sliding of actin and myosin is systole. During systole, the heart muscle contracts to pump blood out of the heart into the circulation. This contraction is driven by the sliding of actin and myosin filaments in the cardiac muscle cells.


What phase of the cardiac cycle is the heart in when all four valves of the heart are closed and ventricular pressure is building but is not yet great enough to open a valve?

That phase is called as isovolumetric contraction phase.


What happens during the T wave of the cardiac cycle?

During the T wave of the cardiac cycle, the ventricles of the heart repolarize, meaning they reset their electrical charge in preparation for the next heartbeat. This phase represents the relaxation and recovery of the heart muscle after contraction.


During what phase of cardiac cycle are all four chambers in diastole?

Once the ventricles contraction phase is over, the diastole starts. Then all the four chambers are in diastole, till the atria start to contract.


What is the start of the contraction phase in a business cycle called?

Similarly, a period of recession occurs at the start of the contraction phase.


Which is the phase of cardiac cycle in which the auricles contract?

The auricles will contract during the systolic phase of the cardiac cycle. This is one of the numbers that is measured when a patient has their blood pressure taken.


What phase of the cardiac cycle is longest?

Atria Diastole is the longest (0.7sec)


During which portion of the cardiac cycle is it possible to induce extra systole?

Extrasystole is an extra ventricular systole that happens during the begging of relaxation (repolarization). Since the cardiac is able to depolarize only after repolarization, any stimulus upon the repolarization period created an increased ventricular contraction or which is also called extrasystole but not a new contraction.


What is a contraction phase of the heartbeat?

The cardiac cycle of the heart has two phases - the diastole phase and systole phase. In the systole phase, the ventricles contract and pump blood into the arteries.