Systole
Systole
Systole (/ˈsɪstəliː/; from Ancient Greek συστολή, systolē, "contraction") is a term used in the medical field to describe one of the two main phases of the cardiac cycle.
Pronunciation
The term is pronounced as "SIS-tuh-lee".
Etymology
The term 'systole' originates from the Ancient Greek word 'συστολή' (systolē), which means 'contraction'.
Definition
In cardiology, systole is the phase of the heartbeat when the heart muscle contracts and pumps blood from the chambers into the arteries. This is in contrast to diastole, the phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill with blood.
Related Terms
- Cardiac cycle: The complete cycle of events in the heart from the beginning of one heartbeat to the beginning of the next.
- Diastole: The phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill with blood.
- Heartbeat: A single cycle of contraction and relaxation of the heart muscle.
- Blood pressure: The pressure of the blood in the circulatory system, often measured for diagnosis since it is closely related to the force and rate of the heartbeat and the diameter and elasticity of the arterial walls.
See Also
External links
- Medical encyclopedia article on Systole
- Wikipedia's article - Systole
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