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The cycle diagram depicts one heartbeat of the continuously repeating cardiac cycle, namely: ventricular diastole followed by ventricular systole, etc.—while coordinating with atrial systole followed by atrial diastole, etc.
11 de nov. de 2019 · Learn how the heart beats and circulates blood through the body in two phases: diastole and systole. See diagrams and explanations of the events that occur in each phase and the valves that regulate blood flow.
30 de oct. de 2023 · The cardiac cycle is defined as a sequence of alternating contraction and relaxation of the atria and ventricles in order to pump blood throughout the body. It starts at the beginning of one heartbeat and ends at the beginning of another. The process begins as early as the 4th gestational week when the heart first begins contracting.
There are two basic phases of the cardiac cycle: diastole (relaxation and filling) and systole (contraction and ejection). Diastole represents the period when the ventricles are relaxed (not contracting).
The cardiac cycle which begins when both the atria and ventricles are relaxed (diastole) can be broken up into four phases – filling, isovolumic contraction, ejection, and filling. Several variables change during each of these phases.
The cardiac cycle has two main phases: Diastole: When the heart muscle relaxes and fills with blood, and ; Systole: When the heart muscle contracts and pumps blood forward. It is important to note that the terms "diastole" and "systole" are typically used to describe phases of the ventricles.
The cardiac cycle is a repeating process by which the heart pumps blood into circulation. It consists of two phases: the diastole (relaxation) phase and the systole (contraction) phase.
