| atriocarotid interval | An obsolete term for the time between the beginning of the atrial and that of the carotid waves in a tracing of the jugular pulse. (05 Mar 2000) |
|---|---|
| atriomegaly | Enlargement of the atrium. Origin: atrio-+ G. Megas, great (05 Mar 2000) |
| atrionector | Synonym: sinuatrial node. Origin: atrio-+ L. Necto, to join (05 Mar 2000) |
| atriopeptin | Synonym: atrial natriuretic peptide. Origin: atrio-+ peptide + suffix -in, material (05 Mar 2000) |
| atrioseptoplasty | Surgical repair of an atrial septal defect. Origin: atrio-+ L. Septum, partition, + G. Plastos, formed (05 Mar 2000) |
| atrioseptostomy | Establishment of a communication between the two atria of the heart. Origin: atrio-+ L. Septum, partition, + G. Stoma, mouth Balloon atrioseptostomy, tearing or enlarging the foramen ovale by pulling a balloon-bearing catheter across the atrial septum for the purpose of augmenting interatrial mixing of blood in the treatment of cyanotic congenital heart disease. (05 Mar 2000) |
| atriosystolic murmur | A murmur heard at the end of ventricular diastole (during atrial systole if in sinus rhythm), usually due to obstruction at one of the atrioventricular orifices. Synonym: atriosystolic murmur, late diastolic murmur. (05 Mar 2000) |
| atriotomy | Surgical opening of an atrium. Origin: atrio-+ G. Tome, incision (05 Mar 2000) |
| atrioventricular | <anatomy, cardiology> Pertaining to an atrium of the heart and to a ventricle. (16 Dec 1997) |
| atrioventricular band | The bundle of modified cardiac muscle fibres that begins at the atrioventricular node as the trunk of the atrioventricular bundle and passes through the right atrioventricular fibrous ring to the membranous part of the interventricular septum where the trunk divides into two branches, the right crus of the atrioventricular bundle and the left crus of the atrioventricular bundle; the two crura ramify in the subendocardium of their respective ventricles. Synonym: fasciculus atrioventricularis, atrioventricular band, Gaskell's bridge, His' band, His' bundle, bundle of His, Keith's bundle, Kent's bundle, Kent-His bundle, ventriculonector. (05 Mar 2000) |
| atrioventricular block | <cardiology> A conduction disturbance that results in the inappropriate delay (or complete inability) of a electrical impulse, generated in the atria, to reach the ventricles (via the atrioventricular node). Clinical types are divided into first (nonserious), second and third degree (most serious). Some drugs may precipitate atrioventricular block (for example clonidine, methyldopa, verapamil). A permanent pacemaker may be required for a third degree (complete) heart block. (02 Jan 1998) |
| atrioventricular bundle | The bundle of modified cardiac muscle fibres that begins at the atrioventricular node as the trunk of the atrioventricular bundle and passes through the right atrioventricular fibrous ring to the membranous part of the interventricular septum where the trunk divides into two branches, the right crus of the atrioventricular bundle and the left crus of the atrioventricular bundle; the two crura ramify in the subendocardium of their respective ventricles. Synonym: fasciculus atrioventricularis, atrioventricular band, Gaskell's bridge, His' band, His' bundle, bundle of His, Keith's bundle, Kent's bundle, Kent-His bundle, ventriculonector. (05 Mar 2000) |
| atrioventricular canal | The canal in the embryonic heart leading from the common sinuatrial chamber to the ventricle. (05 Mar 2000) |
| atrioventricular canal cushions | A pair of mounds of embryonic connective tissue covered by endothelium, bulging into the embryonic atrioventricular canal; located one dorsally and one ventrally, they grow together and fuse with each other and with the lower edge of the septum primum, dividing the originally single canal into right and left atrioventricular orifices. Synonym: endocardial cushions. (05 Mar 2000) |
| atrioventricular conduction | Forward conduction of the cardiac impulse from atria to ventricles via the A-V node or any bypass tract, represented in the electrocardiogram by the P-R interval. P-H conduction time is from the onset of the P wave to the first high frequency component of the His bundle electrogram (normally 119 ± 38 msec); A-H conduction time is from the onset of the first high frequency component of the atrial electrogram to the first high frequency component of the His bundle electrogram (normally 92 ± 38 msec); P-A conduction time is from the onset of the P wave to the onset of the atrial electrogram (normally 27 ± 18 msec). (05 Mar 2000) |
| atrium |
(atri
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
|
|---|---|
| atri |
(atri(o)-) [L. atrium, qv] a combining form denoting relationship to an atrium of the heart.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
|
| atrial asynchronous pacemaker |
an artificial cardiac pacemaker that stimulates the atrium at a constant rate, without sensing atrial or ventricular activity; rarely used except to initiate or terminate some tachycardias. Called also AOO p.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
|
| atrial capture |
depolarization of the atria in response to stimulus either originating elsewhere in the heart or pacemaker induced.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
|
| atrial chronotropic incompetence |
inability to increase the heart rate to levels capable of satisfying the needs of the body.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
|