- sinoatrial rhythm
- sinus r.
Medical dictionary. 2011.
sinoatrial rhythm
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Sinoatrial arrest — or sinus arrest is a medical condition wherin the sinoatrial node of the heart transiently ceases to generate the electrical impulses that normally stimulate the myocardial tissues to contract and thus the heart to beat. Since the heart contains… … Wikipedia
Sinoatrial node — Infobox Anatomy Name = Sinoatrial or (el) node Latin = nodus sinuatrialis GraySubject = GrayPage = Caption = Interior of right side of heart. (SA node not labeled, but region visible at left, near crista terminalis. Caption2 = Schematic… … Wikipedia
Rhythm, sinus — The normal regular rhythm of the heart set by the natural pacemaker of the heart called the sinoatrial (or sinus) node. It is located in the wall of the right atrium (the right upper chamber of the heart). Normal cardiac impulses start there and… … Medical dictionary
rhythm — 1. Measured time or motion; the regular alternation of two or more different or opposite states. 2. SYN: r. method. 3. Regular or irregular occurrence of an electrical event in the electrocardiogram or electroencephalogram. SEE ALSO: wave. 4.… … Medical dictionary
sinoatrial bradycardia — sinus bradycardia (SB) a slow sinus rhythm, with a heart rate of less than 60 beats per minute in an adult; it is common in young adults and in athletes but is also a manifestation of some disorders. Sinus bradycardia. The second and third QRS… … Medical dictionary
Sinus rhythm — The normal regular rhythm of the heart set by the natural pacemaker of the heart called the sinoatrial (or sinus) node. It is located in the wall of the right atrium (the right upper chamber of the heart). Normal cardiac impulses start there and… … Medical dictionary
Accelerated idioventricular rhythm — Infobox Disease Name = PAGENAME Caption = DiseasesDB = ICD10 = ICD9 = ICDO = OMIM = MedlinePlus = eMedicineSubj = eMedicineTopic = MeshID = D016170 The rate of cardiac contraction is determined by the intrinsic rate of depolarisation of the… … Wikipedia
ectopic rhythm — a heart rhythm initiated by a focus outside the sinoatrial node … Medical dictionary
escape rhythm — a heart rhythm initiated by lower centers when the sinoatrial node fails to initiate impulses, its rhythmicity is depressed, or its impulses are completely blocked … Medical dictionary
supraventricular rhythm — any cardiac rhythm originating above the ventricles, either normally in the sinoatrial node or abnormally elsewhere in the atria or in the atrioventricular node. Cf. supraventricular arrhythmia … Medical dictionary
