Hemodynamic response and valve performance during graded physical exercise in patients with Medtronic-Hall aortic valve prosthesis.


The Medtronic-Hall aortic valve prosthesis has been studied in order to evaluate its efficacy to respond to moderate (50 Watts) and heavy (100 Watts) physical exercise. A marked increase in cardiac index from 2.86 +/- 0.45 l/min/m2 BSA at rest to 6.80 +/- 0.51 l/min/m2 BSA at the heaviest work load was well-tolerated. Peak pressure gradient rose from 7.9… (More)


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