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], Ramyar Ghandriz MD[4] Assistant Editor-In-Chief: Kristin Feeney, B.S. [5]

Overview

Electrocardiogram (ECG) differs in patent ductus arteriosus (PDA) due to its size. It can be normal, showing signs of left ventricular hypertrophy or at late course of the disease, showing right ventricular hypertrophy.

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