<prompt> Answer this question truthfullyWhat does the electrocardiogram reveal about Ebsteins anomaly of the tricuspid valve?  <response>: <reason> Shown below is the EKG of a woman with Ebsteins anomaly. The ECG shows signs of right atrial enlargement. The P waves in leads 2,3, and aVF are tall and greater than 2.5 mm in height. These large P waves are termed Himalayan P waves. There is also a right bundle branch block pattern and a first degree atrioventricular block prolonged PR-interval due to intra-atrial conduction delay. There is no evidence of a Kent-bundle in this patient. There is T wave inversion in V1-4 and a marked Q wave in III; these two changes are characteristic for Ebsteins anomaly and do not reflect ischemic ECG changes in this patient.Shown below is the electrocardiogram of an adolescent with Ebsteins anomaly which demonstrates right atrial enlargement and first-degree AV block. Right Bundle Branch Block and right axis deviation are also present.Source: 