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Ejection Load Changes in Aortic Stenosis Observations Made After Balloon Aortic Valvuloplasty Youngtack Shim, Thomas G. Hampton, Craig A. Straley, J. Kevin Harrison, Laurence A. Spero, Thomas M. Bashore, and Ares D. Pasipoularides To investigate complementarity and competitiveness between the intrinsic and extrinsic components of the total left ventricular systolic load, hemodynamic data from 18 elderly subjects with severe aortic stenosis were analyzed before and after balloon dilation of the stenosed aortic valve. Multisensor micromanometric pressure measurements allowed calculation (simplified Bernoulli equation) of the ejection velocity and aortic input impedance spectra. Despite a 32% increase in the aortic valve area (from 0.56±0.04 to 0.74±0.05 cm2 [mean±SEM],p
Ejection Load Changes in Aortic Stenosis Observations Made After Balloon Aortic Valvuloplasty Youngtack Shim, Thomas G. Hampton, Craig A. Straley, J. Kevin Harrison, Laurence A. Spero, Thomas M. Bashore, and Ares D. Pasipoularides To investigate complementarity and competitiveness between the intrinsic and extrinsic components of the total left ventricular systolic load, hemodynamic data from 18 elderly subjects with severe aortic stenosis were analyzed before and after balloon dilation of the stenosed aortic valve. Multisensor micromanometric pressure measurements allowed calculation (simplified Bernoulli equation) of the ejection velocity and aortic input impedance spectra. Despite a 32% increase in the aortic valve area (from 0.56±0.04 to 0.74±0.05 cm2 [mean±SEM],p
