| atrial demand inhibited pacemaker |
an artificial cardiac pacemaker that delivers stimuli to the atrium at a fixed rate in the absence of sensed atrial activity; spontaneous cardiac activity causes inhibition of pacemaker output, termination of the current stimulation cycle, and initiation of a new cycle. Called also AAI p.
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| atrial demand triggered pacemaker |
an artificial cardiac pacemaker that delivers stimuli to the atrium at a fixed rate in the absence of sensed atrial activity; spontaneous cardiac activity triggers pacemaker output, which falls ineffectively in the myocardial refractory period and initiates a new pacemaker stimulation cycle. Called also AAT p.
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| atrial infarction |
the formation of an infarct in a cardiac atrium, which may be due to coronary artery occlusion, periarteritis nodosa, obliterating endarteritis of the small branches of coronary arteries, or other conditions.
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| atrial natriuretic peptide |
(ANP) a hormone involved in natriuresis and the regulation of renal and cardiovascular homeostasis. It is generally 28 amino acids in length but varies somewhat; it is synthesized as a prohormone in the granules of the myocytes of the atrium and is released into the circulation in response to atrial dilatation or increased intravascular fluid volume. ...
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| atrial pacing |
regulation of the rate of the heartbeat by means of an intracardiac electrode inserted in the atrium or by temporary placement of an esophageal electrode.
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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