what are systole diaslole and pause ?
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Diastole and systole are two phases of the cardiac cycle. They occur as the heart beats, pumping blood through a system of blood vessels that carry blood to every part of the body. Systole occurs when the heart contracts to pump blood out, and diastole occurs when the heart relaxes after contraction.
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The cardiac cycle refers to a complete heartbeat from its generation to the beginning of the next beat, and so includes the diastole (relaxation), the systole (contraction) and the intervening pause. The frequency of the cardiac cycle is described by the heart rate, which is typically expressed as beats per minute.
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