| Autor: |
Towne WD, Patel R, Cruz J, Kramer N, Chawla KK |
| Jazyk: |
angličtina |
| Zdroj: |
British heart journal [Br Heart J] 1978 May; Vol. 40 (5), pp. 482-8. |
| DOI: |
10.1136/hrt.40.5.482 |
| Abstrakt: |
The effects of passive head-up tilt on systolic time intervals were assessed in 18 patients with mitral valve prolapse. In addition to causing prolongation of the pre-ejection period and shortening of left ventricular ejection time, this circulatory stress led to progressive shortening of the Q to click interval. In 1 patient, a systolic click became audible which had not been heard in the supine posture. In 7 patients the click disappeared during head-up tilt, usually at 60 degrees or 90 degrees. In 2 patients without a murmur while supine, a mid-late systolic murmur appeared with tilt; 1 of these 2 as well as another patient who had a soft late systolic murmur while supine developed loud systolic whoops at greater angles of tile. The correlations between Q to click interval and aortic valve opening to click interval, and both the angle and the sine of the angle of tilt were highly significant. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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