An unusual type of partial anomalous pulmonary venous return with all pulmonary veins draining to left atrium (

A 66-year-old woman presented to the cardiology clinic with dyspnea and decreased exercise tolerance. Physical examination was significant for a precordial 2/6 systolic murmur. Vital signs were in normal range. ECG showed sinus rhythm with right axis deviation and right bundle branch block. Chest X ray was normal.