text: In<unk><unk> , the ECG has signs of both left and right atrial<unk> .
  In lead V1 the following are observed:
  The P wave is biphasic with a large initial positive peak followed by a negative deflection.
  The P wave is more than 0.04 seconds in duration.
  The positive initial part of the P wave is > 1.5 mm and the negative terminal part of the P wave is > 1 mm.
option_0: EKG in biatrial enlargement
option_1: Atrial fibrillation with LBBB EKG examples
option_2: Third degree AV block electrocardiogram
option_3: Second degree AV block other imaging findings
option_4: First degree AV block other imaging findings
option_5: First degree AV block electrocardiogram
option_6: Third degree AV block other imaging findings
option_7: Stress cardiomyopathy other imaging findings