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Table 1 Baseline characteristics of the study cohort.

From: Potassium channel gene mutations rarely cause atrial fibrillation

  Mean ± SD or n (Percentage)
Total 96
Age at enrollment (years) 56.1 ± 10.3
Age at onset of AF (years) 46.3 ± 12.2
Paroxysmal AF 78 (81.3)
Heart rate (bpm) 67 ± 14.1 bpm
Systolic blood pressure (mmHg) 126.3 ± 23.4
Diastolic blood pressure (mmHg) 77.3 ± 9.5
Electrocardiogram  
   PR interval (ms) 176 ± 32.0
   QRS interval (ms) 95.6 ± 15.3
   QTc interval (ms) 412 ± 41.8
Echocardiogram  
   Left atrial size (mm) 39.9 ± 7.0
   Ejection fraction (percent) 62.0 ± 7.2
Ethnicity  
   Caucasian 92 (96)
   African-American 1 (1)
   Asian 1 (1)
   American Indian 1 (1)
   Middle Eastern 1 (1)