Which finding on an electrocardiogram is indicative of Cor Pulmonale?

Right ventricular hypertrophy is indicative of Cor Pulmonale because this condition occurs as a result of prolonged pressure overload on the right ventricle due to lung disease, such as chronic obstructive pulmonary disease (COPD) or pulmonary hypertension. When the right ventricle faces this increased workload, it undergoes hypertrophy, which can be reflected in an electrocardiogram (ECG) as changes in the amplitude or direction of certain waves or complexes, including the R wave in V1 and V2 becoming larger or having an abnormal pattern.

In contrast, left ventricular hypertrophy primarily relates to conditions affecting the left side of the heart, such as hypertension or aortic stenosis, and is not directly indicative of right-sided heart issues associated with Cor Pulmonale. Atrial fibrillation can occur in many heart conditions but is not specific to right ventricular strain or overload. ST segment elevation typically indicates is ischemia or injury to myocardial tissue, which is unrelated to Cor Pulmonale. Thus, the presence of right ventricular hypertrophy on an ECG is a key indicator of the physiological changes that occur in the heart as a consequence of Cor Pulmonale.