Patients with first-degree AV-block ( n = @ ) were older ( median -LSB- Q@ , Q@ -RSB- ; @ -LSB- @ , @ -RSB- years vs @ -LSB- @ , @ -RSB- years , P < @ ) , more often male ( @ % vs @ % , P = @ ) , and had more comorbidity , such as hypertension ( @ % vs @ % , P = @ ) and heart failure ( @ % vs @ % , P = @ ) than patients with normal AV-conduction ( n = @,@ ) .