Successful Resuscitation Using Percutaneous Cardiopulmonary Support in a Woman with Acute Heart Failure during a Thyroid Storm

: Thyroid storm is a rare, life-threatening condition characterized by severe manifestations of thyrotoxico- sis. Acute heart failure is one of the well-known com- plications of thyrotoxicosis. Thyrotoxicosis-induced heart failure sometimes causes circulatory collapse with high mortality. A 43-year-old woman had palpitations and exertional dyspnea without medical history. She developed con- gestive heart failure, due to tachycardiac atrial fibrilla- tion with no acute ischemic changes. High serum level of FT3 and FT4, and low level of TSH were shown in thyroid function tests, and thyromegaly in carotid ultrasound test She was admitted to the intensive care unit for acute heart failure caused by thyroid storm. Two days after admission, cardiopulmonary resuscitation and endotracheal intubation were necessary due to sudden cardiac arrest Transthoracic echocardiogram showed normal cardiac function after successful resuscitation. Five days after admission, her condition deteriorated with severe cardiac dysfunction, and she received PCPS (percutaneous cardiopulmonary support) for cardiovascular collapse resulting in persistent tachy- cardiac atrial fibrillation. Ten days after initiation of PCPS, the patient's cardiovascular function improved with estimated left ventricular ejection fraction of 50 percent and she was weaned off PCPS. In the case of acute heart failure with untreated hyperthyroid and refractory atrial fibrillation, careful hemodynamic management is required to avoid cardio- vascular collapse.