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What does an extra systole correspond to?
nothing
What is the significance of an extra-systole?
Often an extra-systole [pronounced sis-tol-ee] has no significance. If you have more than 8-10 per minute then a visit to a doctor for a heart tracing would be advised.
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.
Is the blood pressure in systemic arteries greatest during atrial systole or ventricular systole?
ventricular systole
What is the contractive phase of heartbeat?
systole
Period of heart contraction?
Contraction of the ventricles and atria is called systole. Relaxation is called diastole.
What is the time taken by atrial systole and ventricular systole?
0.4sec
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.
What causes compensatory pause following an extra systole?
repolariztion of the cardiac cells. ie after they have depolarized so quickly it takes a while for them to get back to a normal state
Who comes first atrial systole or ventricle systole?
Atrial systole -- The atrium contracts, then the ventricle.
What heart valves are closed during systole?
In late diastole (relaxation phase), the semilunar (pocket) valves close, due to decreasing arterial pressure, to prevent blood flowing back into the ventricles. These stay closed during atrial systole. (But open again during ventricular systole.)Then, as the ventricles contract during ventricular systole, the bicuspid and tricuspid valves close to prevent blood from flowing back to the atria.So, it really depends on which phase of the contraction we are looking at.(Ed: format)
A diagram of the ventricular systole in the heart?
This can be seen by clicing on the link below ( The ventricular systole )
