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Table 3 Electrocardiography results

From: Structural and functional cardiac changes in myotonic dystrophy type 1: a cardiovascular magnetic resonance study

 

n = 80

Frequency, bpm (range)

70 (40–95)

Sinusbradycardia, n (%)

14 (18%)

Atrial fibrillation, n (%)

2 (3%)

PR interval, ms (range)

200 (136–460)

Prolonged PR interval, n (%)

30 (38%)

QRS duration, ms (range)

100 (80–164)

Intraventricular conduction delay, n (%)

26 (33%)

Left anterior fascicular block, n (%)

6 (8%)

Left posterior fascicular block, n (%)

1 (1%)

  1. * sinusbradycardia was defined as frequency <60 bpm.