- An electronic device that is implanted in the body to monitor heart rate and rhythm. It gives the heart electrical stimulation when it does not beat normally. A cardiac pacemaker runs on batteries and has long, thin wires that connect it to the heart. Also called pacemaker and artificial pacemaker.
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Cardiac pacemaker — The contractions of the heart are controlled by chemical impulses, which fire at a rate which controls the beat of the heart.The cells that create these rhythmical impulses are called pacemaker cells, and they directly control the heart rate.… … Wikipedia
cardiac pacemaker — the group of cells rhythmically initiating the heartbeat, characterized physiologically by a slow loss of membrane potential during diastole. Usually the pacemaker site is the sinoatrial node. See also artificial cardiac p … Medical dictionary
cardiac pacemaker — noun a specialized bit of heart tissue that controls the heartbeat • Syn: ↑pacemaker, ↑sinoatrial node, ↑SA node • Hypernyms: ↑cardiac muscle, ↑heart muscle … Useful english dictionary
cardiac pacemaker — electrical device which stimulates and regulates the heartbeat by delivering weak electrical pulses to the cardiac muscle at regular intervals (Cardiology) … English contemporary dictionary
Cardiac cycle — Cardiac events occurring in the cardiac cycle. Two complete cycles are illustrated. The cardiac cycle is a term referring to all or any of the events related to the flow or blood pressure that occurs from the beginning of one heartbeat to the… … Wikipedia
Pacemaker (disambiguation) — Pacemaker may refer to:In biology and medicine: * Cardiac pacemaker, a group of cells within the heart that together initiate contractions and set the pace of beating * Artificial pacemaker, a device implanted to provide proper heart rhythm when… … Wikipedia
pacemaker — n. (Physiol. & Anat.) 1. a specialized bit of heart tissue that controls the heartbeat. Syn: cardiac pacemaker, sinoatrial node. [WordNet 1.5] 2. An implanted electronic device that takes over the function of the natural cardiac pacemaker;… … The Collaborative International Dictionary of English
Cardiac muscle — Dog Cardiac Muscl … Wikipedia
Cardiac electrophysiology — is the science of elucidating, diagnosing, and treating the electrical activities of the heart. The term is usually used to describe studies of such phenomena by invasive (intracardiac) catheter recording of spontaneous activity as well as of… … Wikipedia
Cardiac action potential — The cardiac action potential is a specialized action potential in the heart, with unique properties necessary for function of the electrical conduction system of the heart.The cardiac action potential differs significantly in different portions… … Wikipedia