| atrial septum | The wall between the two upper chambers (the right and left atrium) of the heart. (12 Dec 1998) |
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| atrial sound | The sound produced in late diastole in association with ventricular filling due to atrial systole and related to reduced ventricular compliance. It is a low frequency oscillation that may be normal at older ages owing to a physiologic decline in ventricular compliance but is nearly always abnormal at younger ages if it is of high intensity or palpable. It is common in ventricular hypertrophy, particularly with hypertension, and is almost invariable during acute myocardial infarction. Fourth heart sounds may arise from the right or left ventricle or both. Synonym: atrial sound. (05 Mar 2000) |
| atrial synchronous pulse generator | A ventricular stimulating pulse whose rate of discharge is directly determined by the atrial rate. Synonym: atrial triggered pulse generator. (05 Mar 2000) |
| atrial systole | Contraction of the atria. Synonym: auricular systole. (05 Mar 2000) |
| atrial tachycardia | Paroxysmal tachycardia originating in an ectopic focus in the atrium. Synonym: auricular tachycardia. (05 Mar 2000) |
| atrial transport function | The role of the atria in filling and stretching the ventricles by their presystolic contraction, without which the force of ventricular contraction and hence the cardiac output may significantly decrease. (05 Mar 2000) |
| atrial triggered pulse generator | A ventricular stimulating pulse whose rate of discharge is directly determined by the atrial rate. Synonym: atrial triggered pulse generator. (05 Mar 2000) |
| atrial ventricular canal defect | A defect caused by deficient or absent septal tissue immediately above and below the normal level of the atrioventricular valves, including the region normally occupied by the A-V septum in hearts with two ventricles. The A-V valves are abnormal to a varying degree. (05 Mar 2000) |
| atrial-well technique | An obsolete semi-closed surgical technique for repairing atrial septal defects and other cardiac abnormalities. (05 Mar 2000) |
| 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.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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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. ...
출처: 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.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| atrial reentry |
reentry in which the entire reentrant circuit lies within one or both atria, excluding the sinus node.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| atrial ring |
the ring surrounding the opening between the atrium and ventricle of the primitive vertebrate heart; represented in the mammalian heart by the atrioventricular node.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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