| AP | accessory pathway; accounts payable; acid phosphatase; acinar parenchyma; action potential; active p... |
|---|---|
| AV | Adriamycin and vincristine; air velocity; allergic vasculitis; anteroventral; anteversion; anticipat... |
| A-V | arteriovenous; atrioventricular |
| AVB | atrioventricular block |
| AVC | aberrant ventricular conduction; Academy of Veterinary Cardiology; aortic valve closure; associative... |
| AVRT | Atrioventricular reentrant tachycardia |
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| CAVB | Complete atrioventricular block |
| AP | atrioventricular pathways |
| CAVC | complete atrioventricular canal |
| atrioventricular junctional rhythm | The cardiac rhythm when the heart is controlled by the A-V junction (including node); arising in the A-V junction, the impulse ascends to the atria and descends to the ventricles, each at varying speeds depending on site of the pacemaker. Synonym: A-V junctional rhythm, nodal bradycardia, nodal rhythm. (05 Mar 2000) |
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| atrioventricular junctional tachycardia | Tachycardia originating in the A-V junction. Synonym: A-V junctional tachycardia, nodal tachycardia. (05 Mar 2000) |
| atrioventricular nodal branch | The atrioventricular branches or the nodal branches, the small arteries supplying the atrioventricular node; they usually arise from the right coronary artery where it starts to descend the posterior interventricular sulcus. Synonym: ramus nodi atrioventricularis, atrioventricular nodal branch, branch to atrioventricular node. (05 Mar 2000) |
| atrioventricular nodal extrasystole | A premature beat arising from the A-V junction and leading to a simultaneous or almost simultaneous contraction of atria and ventricles. (05 Mar 2000) |
| atrioventricular node | <cardiology> The location in the heart's conduction system, between the atria and the ventricles, which conducts the normal electrical impulse from the atria to the ventricles. (27 Sep 1997) |
| atrioventricular septum | The small part of the membranous septum of the heart just above the septal cusp of the tricuspid valve that separates the right atrium from the left ventricle. Synonym: septum atrioventriculare, pars membranacea septi atriorum. (05 Mar 2000) |
| atrioventricular sulcus | A groove on the outer surface of the heart marking the division between the atria and the ventricles. Synonym: sulcus coronarius, atrioventricular groove, atrioventricular sulcus, auriculoventricular groove, coronary sulcus. (05 Mar 2000) |
| atrioventricular valves | See: tricuspid valve, mitral valve. (05 Mar 2000) |
| tachycardia, atrioventricular nodal reentry | A tachycardia characterised by rates between 150 and 250 beats per minute and a qrs complex of supraventricular origin. (12 Dec 1998) |
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| trunk of atrioventricular bundle | The singular initial portion (stem) of the atrioventricular bundle which passes from the atrioventricular node into the right trigone of the fibrous skeleton of the heart and along the periphery of the membranous interventricular septum; upon reaching the muscular interventricular septum, the trunk terminates by dividing into the right and left crura of the atrioventricular bundle. Synonym: truncus fascicularis atrioventricularis. (05 Mar 2000) |
| left atrioventricular valve | <anatomy, cardiology> The heart valve that divides the left atrium and left ventricle. During left atrial contraction, the mitral valve opens to allow blood to flow into the left ventricle. Upon closure, the mitral valve prohibits the regurgitation of blood back into the left atrium. The mitral valve is the only heart valve that has only 2 valve cusps (all others have 3). (13 Nov 1997) |
| left crus of atrioventricular bundle | The left leg or branch of the atrioventricular bundle which separates from the atrioventricular bundle just below the membranous portion of the interventricular septum to descend the septal wall of the left ventricle and begins to ramify subendocardially. Synonym: crus sinistrum fasciculi atrioventricularis. (05 Mar 2000) |
| atrioventricular junctional pacemaker |
an ectopic pacemaker occurring in the atrioventricular junction.
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| atrioventricular septum of heart |
septum atrioventricula
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| atrioventricular block |
AV block, impairment of conduction of cardiac impulses from the atria to the ventricles, usually due to a block in the atrioventricular junctional tissue (atrioventricular node, bundle of His, or bundle branches). It is generally subclassified as first, second, or third degree atrioventricular block. Cf. heart b.
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| atrioventricular junction |
AV junction, part or all of the entire region comprising the atrioventricular node and the bundle of His, with the bundle branches sometimes specifically excluded.
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| atrioventricularis communis |
(atri
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