Key result
Mechanical heart valve prostheses generated significantly more gaseous HITS than bioprostheses in an in vitro model, with HITS rates strongly correlating with left ventricular dp/dtmax.
Why the study?
Do mechanical heart valves generate more HITS than bioprosthetic valves in an in vitro model?
Population
In vitro model using a cell-free filtered water-glycerol test fluid to evaluate prosthetic heart valves
Comparison
Mechanical heart valve prostheses vs Bioprosthetic heart valves
Design
Preclinical
Authors
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Hypothesis-generating for differential embolic risk by valve type; prospective clinical studies needed before influencing selection.
Do mechanical heart valves generate more HITS than bioprosthetic valves in an in vitro model?
In vitro testing confirms that mechanical heart valves generate significantly more gaseous microemboli (HITS) than bioprostheses, likely due to cavitation.
Potthast et al. (2000) studied Prosthetic heart valves. Mechanical heart valve prostheses vs. Bioprosthetic valves was evaluated on HITS rate (microemboli quantification). Mechanical heart valve prostheses generated significantly more gaseous HITS than bioprostheses in an in vitro model, with HITS rates strongly correlating with left ventricular dp/dtmax.