- pacemaker cell
- a myocardial cell demonstrating automaticity; i.e., one that initiates electrical activity in the absence of external stimuli. Called also automatic c.
Medical dictionary. 2011.
pacemaker cell
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Cell signaling — is part of a complex system of communication that governs basic cellular activities and coordinates cell actions. [Witzany, G. (2000). Life: The Communicative Structure. Norderstedt, Libri BoD.] The ability of cells to perceive and correctly… … Wikipedia
Pacemaker — A system that sends electrical impulses to the heart in order to set the heart rhythm. The pacemaker can be the normal natural pacemaker of the heart or it can be an electronic device. The natural pacemaker of the heart is the sinus node, one of… … Medical dictionary
Pacemaker potential — In the heart, the pacemaker potential is the voltage created by impulses from an artificial electronic pacemaker or the SA node which drives the rhythmic firing of the heart.The pacemaker potential brings the membrane potential to the threshold… … Wikipedia
Cell — The basic structural and functional unit in people and all living things. Each cell is a small container of chemicals and water wrapped in a membrane. Each cell in the human body there are 100 trillion cells in each of us contains the entire… … Medical dictionary
Pacemaker, natural — The natural pacemaker of the heart is the sinus node, one of the major elements in the cardiac conduction system, the system that controls the heart rate. This stunningly designed system generates electrical impulses and conducts them throughout… … Medical dictionary
pacemaker potential — the slow diastolic depolarization of cell membranes that normally occurs in the sinoatrial node, atrioventricular node, and His Purkinje system; under some abnormal conditions it can also occur in atrial and ventricular muscle fibers … Medical dictionary
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
automatic cell — pacemaker c … Medical dictionary
Artificial pacemaker — Cardiac resynchronization therapy and CRT (Cardiac Resynchronization Therapy) redirect here. For the device termed a CRT D, see Implanted cardiac resynchronization device. For other uses, see Pacemaker (disambiguation). A pacemaker, scale in… … Wikipedia
Interstitial cell of Cajal — The Interstitial cell of Cajal (ICC) is a type of cell found in the gastrointestinal tract. It serves as a pacemaker that triggers gut contraction.cite journal |author=Sanders K, Koh S, Ward S |title=Interstitial cells of cajal as pacemakers in… … Wikipedia
