Head up tilt test revealed an increase in the high frequency spectrum of heart rate variability before the onset of the syncope. These findings suggest that the amplitude of the continual fluctuations ...

Only those circumstances in which loss of consciousness can reasonably be attributed to transient cerebral hypoperfusion should be considered "syncope." ...

The differential diagnosis may be large, but bradyarrhythmias, neurocardiogenic syncope, carotid hypersensitivity syndrome, and orthostatic hypotension are the more frequent causes. Good history ...

The head-up tilt-table test (HUT) is crucial for identifying the underlying causes of unexplained syncope ... Previous research has indicated that the vasodilation observed during vasovagal syncope ...

Medically reviewed by Yasmine S. Ali, MD, MSCI Although low blood pressure (otherwise known as hypotension) rarely requires ...

Dysautonomia can be difficult to diagnose, in part because symptoms are linked to a range of health issues. Some causes are ...

Nadolol, a long-acting drug, is preferred for prophylactic therapy and has been found to be effective clinically. In our experience, the dosage used to provide adequate prevention of CVPT and syncope ...