According to the journal article "hemodynamics of 17-mm vs.19-mm st.Jude medical regent and annulus enlargement" (doi: 10.1177/0218492315581574), 20 patients were implanted with a 17mm regent mechanical heart valve and 35 patients were implanted with a 19mm regent valve.The objective was to compare early and mid-term clinical and hemodynamic outcomes of 17mm versus 19mm regent valves with concomitant aortic annulus enlargement.There were a total of five deaths and general reports that included but were not limited to patient-prosthesis mismatch, high gradients, arrhythmias, low cardiac output, permanent ventricular pacing, mitral and/or aortic regurgitation, aortic dissection with reoperation and infectious complications.The causes of death were: low cardiac output, cardiac arrest, bleeding, multiorgan failure and heart failure.No specific devices or patients were identifiable.
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