The heart is a muscular organ in all vertebrates responsible for pumping blood through the blood vessels by repeated, rhythmic contractions, or a similar structure in annelids, mollusks, and arthropods. The term cardiac (as in cardiology) means “related to the heart”
Electrocardiogram (ECG) – is used for diagnosing heart conditions by recording the small electric waves generated during heart activity.
- The 1924 Nobel Prize in Physiology or Medicine was awarded for the discovery of the electrocardiogram, ECG.
If a person is encountered in cardiac arrest, cardiopulmonary resuscitation (CPR) should be started and help called. Use of a defibrillator is preferred, if available, to attempt to restore a normal heartbeat;
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