Format

Send to

Choose Destination
Am J Cardiol. 1997 May 1;79(9):1302-6.

Neurohormonal response to head-up tilt and its role in vasovagal syncope.

Author information

1
Cardiology Department, Christchurch Hospital, New Zealand.

Abstract

In a controlled study, 26 patients with a history of recurrent syncope were found to have increased arginine vasopressin, corticotrophin, and atrial natriuretic factor levels after 5 minutes of 60 degrees head-up tilt, long before they became hypotensive. The exaggerated neurohormonal response in these patients may indicate a greater sensitivity to central hypovolemia which may predispose to vasovagal syncope, mediated by the vasodilatory effects of atrial natriuretic factor or the sensitization of mechanoreceptors by arginine vasopressin.

PMID:
9164914
DOI:
10.1016/s0002-9149(9x)00084-9
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center