Functional Impairment in Aortic Valvular Stenosis
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چکیده
across the valve divided by mean flow rate during systolic ejection, gives a better indication of hemodynamic obstruction. This index was compared with Gorlin valve area in 40 patients with aortic stenosis. Calculated area ranged from 0.22 to 1.26 cm2, and mean transvalvular resistance ranged from 117 to 1,244 dyne. sec. cm5. In general, resistance varied inversely with calculated area, but there was substantial variation about the mean relation. All of the variation could be accounted for by variations in the pressure gradients at each value of calculated area. Resistance was higher in proportion to area when flow and pressure gradient
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تاریخ انتشار 2005