Including the heart valves and the coronary arteries and veins
adds additional computational cost due to an increase in element count, as well
as additional constraints and contact definitions.
To increase performance, you can remove these features from the
simulation if your use case does not require any detailed modeling of this
anatomy, as described in
Removing the Valves and Coronary Arteries/Veins from the Model.
Run-Time Performance
describes the effect on performance after removing the valves from the
simulation.