Patent ductus arteriosus electrocardiogram

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: Priyamvada Singh, M.B.B.S. [2], Cafer Zorkun, M.D., Ph.D. [3], Assistant Editor-In-Chief: Kristin Feeney, B.S. [4]

Electrocardiogram

An electrocardiogram will appear differently depending on the severity of disease onset. In general, one can expect:

• Small PDA: the EKG is normal.
• Medium-sized PDA: there is LVH, LA increase, prolonged PR interval and eventual atrial fibrillation.
• Large-sized PDA: is similar to that of a VSD complicated by pulmonary hypertension. One can also expect:
  • Evidence of LVH is decreased or absent because there is essentially normal volume work by the LV.
  • There is RVH instead with a large R wave in V1. No Rsr' like ASD.
  • Marked right axis deviation is common.
  • Peaked RA p waves are present