Table 2

Electrocardiography

Total small ASD (n=151)No tachyarrhythmia
(n=118) (78%)
Supraventricular tachycardia (n=24)P valueVentricular tachycardia (n=12)P value
QRS duration, ms83±1882±1883±180.86881±180.773
PR interval, ms162±28159±27169±300.141170±280.198
PR >200 ms9%7%21%0.0458%0.594
P wave duration, ms83±2082±2085±250.55487±200.451
P-wave height in II, mm1.2±0.41.2±0.41.2±0.40.8551.4±0.50.205
  • ASD, atrial septal defects.