| sinus pause | A spontaneous interruption in the regular sinus rhythm, the pause lasting for a period that is not an exact multiple of the sinus cycle. See: sinus arrest, sinus standstill. (05 Mar 2000) |
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| apneic pause | Cessation of air flow for more than 10 seconds. See: sleep apnea. (05 Mar 2000) |
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| pause | 1. A temporary stop or rest; an intermission of action; interruption; suspension; cessation. 2. Temporary inaction or waiting; hesitation; suspence; doubt. "I stand in pause where I shall first begin." (Shak) 3. In speaking or reading aloud, a brief arrest or suspension of voice, to indicate the limits and relations of sentences and their parts. 4. In writing and printing, a mark indicating the place and nature of an arrest of voice in reading; a punctuation point; as, teach the pupil to mind the pauses. 5. A break or paragraph in writing. "He writes with warmth, which usually neglects method, and those partitions and pauses which men educated in schools observe." (Locke) 6. A hold. See 4th Hold. Synonym: Stop, cessation, suspension. Origin: F, fr. L. Pausa. See Pose. Source: Websters Dictionary (01 Mar 1998) |
| respiratory pause | Cessation of air flow for less than 10 seconds. See: sleep apnea. (05 Mar 2000) |
| compensatory pause | The pause following an extrasystole, when the pause is long enough to compensate for the prematurity of the extrasystole; the short cycle ending with the extrasystole plus the pause following the extrasystole together equal two of the regular cycles. (05 Mar 2000) |
| postextrasystolic pause | The somewhat prolonged cycle immediately following an extrasystole. (05 Mar 2000) |
| preautomatic pause | A temporary pause in cardiac activity before an automatic pacemaker escapes. See: escape. (05 Mar 2000) |
| Amberg's lateral sinus line | A line dividing the angle formed by the anterior edge of the mastoid process and the temporal line. (05 Mar 2000) |
| aneurysm of sinus of Valsalva | A congenital thin-walled tubular out pouching usually in the right or non-coronary sinus with an entirely intracardiac course that may rupture into the right or rarely the left heart chambers to form an aortocardiac fistula. (05 Mar 2000) |
| aortic sinus | The space between the superior aspect of each cusp of the aortic valve and the dilated portion of the wall of the ascending aorta, immediately above each cusp. Synonym: sinus aortae, Petit's sinus, Valsalva's sinus. Arlt's sinus, an inconstant depression on the lower portion of the internal surface of the lacrimal sac. Barber's pilonidal sinus, pilonidal sinus occurring in barbers, usually in the web between the fingers, due to the burying of exogenous hairs by the alternate loosening and tightening of tissues of the hand by the manipulation of scissors. (05 Mar 2000) |
| aortic sinus aneurysm | Abnormal dilation of one or more of the three aortic sinuses situated behind the three aortic valve cusps. (05 Mar 2000) |
| apertura sinus frontalis | One of a pair of openings in the floor of the frontal sinuses in the nasal part of the frontal bone, through which the frontal sinuses communicate with the ethmoidal infundibulum via the frontonasal duct. Synonym: apertura sinus frontalis. (05 Mar 2000) |
| apertura sinus sphenoidalis | One of the pair of openings in the body of the sphenoid bone through which the sphenoid sinuses communicate with the sphenoethmoidal recess of the nasal cavity. Synonym: apertura sinus sphenoidalis, sphenoidal sinus aperture. (05 Mar 2000) |
| arrhythmia, sinus | Irregularity of the heart rate related to functioning of the sinoatrial node. (12 Dec 1998) |
| barotrauma, sinus | See: Barosinusitis. (12 Dec 1998) |
| basilar sinus | A venous plexus on the clivus, connected with the cavernous and petrosal sinuses and the internal vertebral (epidural) venous plexus. Synonym: plexus basilaris, basilar sinus. (05 Mar 2000) |