Cardiac rhythmicity
Cardiac Rhythmicity
Cardiac rhythmicity (pronounced: kahr-dee-ak rith-mi-si-tee) is a term used in medicine to describe the inherent rhythmicity of the heart. It refers to the heart's ability to generate and coordinate electrical signals, which in turn control the heart's contraction and relaxation cycles.
Etymology
The term "cardiac rhythmicity" is derived from two words. "Cardiac" comes from the Greek word "kardia", which means heart. "Rhythmicity" is derived from the Greek word "rhythmos", meaning rhythm or regular recurring motion.
Definition
Cardiac rhythmicity is the inherent ability of the cardiac cells to generate and coordinate electrical signals without external stimulation. This rhythmicity is maintained by the sinoatrial node (SA node), often referred to as the heart's natural pacemaker. The SA node generates electrical impulses that travel through the heart muscle, causing it to contract and pump blood.
Related Terms
- Sinoatrial node: The natural pacemaker of the heart that initiates each heartbeat.
- Cardiac cycle: The sequence of events that occur when the heart beats.
- Electrocardiogram: A test that measures the electrical activity of the heart.
- Arrhythmia: A condition in which the heart beats with an irregular or abnormal rhythm.
See Also
External links
- Medical encyclopedia article on Cardiac rhythmicity
- Wikipedia's article - Cardiac rhythmicity
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