| Autor: |
Araoye, Matthew A., Rubler, Shirley, Holford, Fred D. |
| Předmět: |
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| Zdroj: |
Angiology; Jan1978, Vol. 29 Issue 1, p7-16, 10p |
| Abstrakt: |
Isovolumic relaxation time (IVRT) was determined in 17 controls and 41 patients. Nine patients had ischemic heart disease (IHD), 7 mitral prolapse (MVPS). 13 hypertension (HBP), 7 pregnancy (P), and 5 cardiomyopathy (CM). Echocardiographic measurements of IVRT were made from the aortic second sound to the rapid opening of the mitral valve (A2D¹). Determinations by apexcardiography were made from the aortic second sound to the 0 point (A2O). The IVRT was distinctly shorter when assessed by A2D' than by conventional apexcardiography in controls (69.2 ± 16.4 msec vs 118.7 ± 16.5 msec), and in patients with cardiac disease. The IVRT in 9 older normal controls (mean age 47.7 years) was longer than in 8 younger ones (age 26.3 ± 4.9 years). Patients with myocardial disease (IHD. HBP, and CM) had prolonged IVRTs when compared to normal subjects. Pregnant subjects had shortened intervals. IVRT may be a sensitive indicator of disturbances in myocardial contractility and may be shortened and enhanced contractility. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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