Right atrial enlargement

ECG Findings

  • Rarely isolated finding (usually RVH/RAD also)
  • P amplitude >2.5mm in II
  • Large biphasic p wave in V1 (> 1.5 mm in V1 and V2)
  • Right atrial hyper.-initial component is larger in V1 than V6
  • p-mitrale-m notched p wave in leads 1 and 2. Greater than .12 seconds.

Differential Diagnosis

Cardiac Hypertrophy and Enlargement

See Also


  • Adapted from Niemann, Lampe, Pani, Donaldson, ECGpedia.org
  • Journal of Electrocardiology. Vol 43 (2010). 40-42.