European Journal of Cardiovascular Medicine

The head-up tilt (HUT) test is a standard diagnostic test that is widely accepted in the evaluation of patients with recurrent syncope of unknown etiology. Prolonged asystole during the HUT test is rarely encountered in patients with neurocardiogenic syncope. The incidence of prolonged asystole in patients with neurocar- diogenic syncope is 18% (>3 seconds) and 9.1% (>5 seconds) (1-3). According to our knowledge, there have been few reports related to prolonged asystole longer than 30 seconds during the HUT test (4-8). Asystole lasting for approximately 30 seconds during a HUT test was observed in the present case, which was pre-during HUT.