Normal ECG findings were less prevalent in patients with PE and RV enlargement than those with PE and no RV enlargement (35 of 141 vs 56 of 148 p = 0.02).

RV cavity enlargement was present in 141 patients (49%). The records of patients hospitalized from January 2009 to December 2012 with acute PE and no previous cardiopulmonary disease were reviewed. The purpose of the present investigation was to assess further the relation of ECG changes in acute PE to RV cavity enlargement (dilation). The electrocardiographic (ECG) findings in patients with pulmonary embolism (PE) and no previous cardiopulmonary disease are well documented however, investigation of the relation of ECG abnormalities to right ventricular (RV) enlargement has been limited.