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.

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.

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

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.

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 …

Apr 14, 2025 · When the heart beats, blood pulses through the arteries to travel throughout the body. However, it is not a steady stream like you might see from a garden hose. The pulse of the blood …

May 7, 2022 · When in a contractile state, this is called systole. When in a relaxed state, this is called diastole. The cycle can then be divided into three stages: Atrial systole: contraction of the atria. …

During ventricular systole, pressure rises in the ventricles, pumping blood into the pulmonary trunk from the right ventricle and into the aorta from the left ventricle.

Systole represents the time during which the left and right ventricles contract and eject blood into the aorta and pulmonary artery, respectively. During systole, the aortic and pulmonic valves open to …

Atrial systole, in which blood passes down into the ventricles, precedes the more powerful ventricular systole in which blood is driven into the arteries. Systole alternates with a relaxing period called …