Comparison 2. Different types of standard valves.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
2.1 Treatment failure	2		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
2.2 Mortality	2		Risk Difference (M‐H, Random, 95% CI)	Totals not selected