Method for computation of cardiac output in mitral stenosis independent of left ventricular dimensions and kinetic state: Correlation with cardiac catheterization via the fick method
✍ Scribed by Seitz, W. ;Spiel, M. ;Edmiston, W. ;Miller, F.
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- English
- Weight
- 277 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0098-6569
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✦ Synopsis
An hydraulic orifice formula offering the possibility of quantifying cardiac output in conditlons of mitrai stenosis is tested uslng potentially noninvaslve portlons of catheterization data from patients evaluated for obstructive mitrai valve disease. The equation studied is V = (1/21) R A T2, where V is the cardiac output (ml/min), R is the heart frequency, A is the mitrai valve area (cm?, and T is the diastolic filling interval (sec/ min). The mitrai valve area was determined by the Goriin formula, and R and T were measured from the pressure tracings recorded at cardiac catheterization. The degree of correspondence between the equation tested and the measured cardiac output as determined by the Fkk principle technique Is characterized by r = 0.87, SE = 450 mi/min, N = 10. The results suggest that the new formulation may offer a noninvasive method for estimating the cardiac output status of patients with mitral valve disease once mitrai valve area Is measured either at catheterization or by two-dimensional echocardiography.