Indentation hardness: A simple test that correlates with the dissipated-energy predictor for fatigue-life in bovine pericardium membranes for bioprosthetic heart valves

- Hardness is a fatigue-sensitive parameter that reflects changes in early stages.
- Fatigue performance and energy dissipated in first cycle correlates with hardness.
- Hardness is proposed as an indicator of mechanical performance and fatigue-life.