Neurocardiogenic syncope during a routine colonoscopy: an uncommon malignant presentation.

Neurocardiogenic syncope (NCS) is a common clinical entity. Most of these patients are managed medically by internists and general practitioners. Though NCS is frequently a benign disease, a malignant form of this disorder with episodes of prolonged cardioinhibition culminating in asystole is described. Here, we describe a 52-year-old woman who had such a life threatening malignant form of arrhythmia during a routine colonoscopy and review the literature of similar cases.