Electrical waves track a systole (a contraction) of the heart. The end-point of the P wave depolarization is the start-point of the atrial stage of systole.

Jan 2, 2025 · Systole occurs when the heart contracts to pump blood out, and diastole occurs when the heart relaxes and refills after contraction.

Jul 29, 2024 · Systole refers to the period when your heart contracts and pushes blood out to the rest of your body. Diastole is when the heart relaxes and refills with blood.

Dec 15, 2025 · High systolic blood pressure can be due to stiff arteries and increases the risk of stroke or heart attack. Systolic and diastolic blood pressure are critical indicators of your heart and arterial …

systole, period of contraction of the ventricles of the heart that occurs between the first and second heart sounds of the cardiac cycle (the sequence of events in a single heart beat). Systole causes the …

Oct 30, 2023 · Both the atria and the ventricles undergo alternating states of systole and diastole. In other words, when the atria are in diastole, the ventricles are in systole and vice versa.

Nov 15, 2025 · During systole, the muscular walls of the heart, particularly the ventricles, contract to generate the pressure required to propel blood into the arteries. Conversely, diastole is a period of …