Patients with first-degree AV-block ( n = 378 ) were older ( median [ Q1 , Q3 ] ; 76 [ 70 , 82 ] years vs 73 [ 66 , 79 ] years , P < 0.0001 ) , more often male ( 57 % vs 49 % , P = 0.0049 ) , and had more comorbidity , such as hypertension ( 66 % vs 60 % , P = 0.034 ) and heart failure ( 24 % vs 17 % , P = 0.0050 ) than patients with normal AV-conduction ( n = 1,159 ) .