What causes syncope?

Updated: Jan 13, 2017
  • Author: Rumm Morag, MD, FACEP; Chief Editor: Erik D Schraga, MD  more...
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Cardiac (cardiopulmonary) syncope may be due to vascular disease, cardiomyopathy, arrhythmia, or valvular dysfunction and predicts a worse short-term and long-term prognosis. Obtaining an initial electrocardiogram (ECG) is mandatory if any of these causes are possible for the differential diagnosis.

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