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7 maj 2022 · The cardiac cycle can be divided into systolic (contraction) and diastolic (relaxation) phases. The cycle goes in the following order: atrial systole, ventricular systole and diastole. Heart valves open when the pressure of the chamber lying before it is higher than that of the chamber after the valve.
30 paź 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 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.
16 lip 2023 · The cardiac cycle can be divided into four stages: Filling phase – the ventricles fill during diastole and atrial systole. Isovolumetric contraction – the ventricles contract, but as the heart valves are shut, the volume remains constant.
Summarize and explain the connection between the various events of the cardiac cycle; Compare atrial and ventricular systole and diastole; Relate heart sounds detected by auscultation to action of heart’s valves
Diagram of the Cardiac Cycle, Showing Pressure Curves of the Cardiac Chambers, Heart Sounds, Jugular Pulse Wave, and the ECG.
Each cardiac cycle is initiated by electrical signal that originates in the SA node and travels in a wave of depolarization through the heart. The average heart rate is 60-90 beats per minute, which means the cardiac cycle repeats 60-90 times per minute.
