Table 1.

Evolution of PR Duration in the Three Groups during the 20‐Year Follow‐Up

	Preop.	Postop.	1 year	5 years	10 years	15 years	20 years
G1	0.1 ± 0.4	0.9 ± 1.1	0.9 ± 1.1	0.7 ± 1.2	0.7 ± 0.9	0.8 ± 0.9	1.3 ± 0.9
G2	0.3 ± 0.5	0.9 ± 1.2	0.7 ± 1.2	0.4 ± 1.1	0.7 ± 1.1	1.2 ± 1.1	1.7 ± 1.6
G3	0.3 ± 0.8	0.7 ± 0.7	0.5 ± 0.8	0.4 ± 0.9	0.6 ± 1.2	1.0 ± 1.4	1.4 ± 1.3

Data are expressed as mean Z‐score ± S.D.