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a, b: Coronary angiography revealed no significant stenosis. c: Electrocardiography showed a pacing rhythm and a heart rate of 59 bpm. d: Chest X-ray showed slight congestion and a cardiothoracic ratio of 64.9% with an implantable cardioverter defibrillator. e: Echocardiography detected a preserved ejection fraction and a slight large left ventricular diastolic diameter.
