Q. How to Investigate mitral regurgitation by Electrocardiogram?

Patients with severe mitral regurgitation often have atrial fibrillation. Left atrial enlargement is a common finding in those with sinus rhythm. Left ventricular hypertrophy with ST segment changes may be seen. Signs of pulmonary hypertensions are seen less often and are usually seen in patients with rheumatic etiology. Non specific ST-T changes may be seen in patient with mitral valve prolapse. Q-waves in Inferior leads and LBBB pattern may be seen in patients with functional mitral regurgitation due to ischaemic and dilated cardiomyopathy respectively.