Rest and Exercise Doppler Hemodynamics of the Medtronic Intact Aortic Bioprosthesis Philip C. Strike MRCP, Serban A. Balanescu MD, Diane Gardiner RN, Steven A. Livesey FRCS, Iain. A. Simpson MD Doppler echocardiography was used to evaluate the functional rest and stress hemodynamic profile of the Medtronic Intact aortic bioprosthesis. Symptom-limited exercise treadmill testing was used for physiological stress across the range of valve sizes in a group of 93 patients. The Medtronic Intact aortic bioprosthesis provided good hemodynamics both at rest and exercise, across the range of implanted valve sizes.

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