TY - JOUR
T1 - Comparison of responses to isoproterenol and epinephrine during head-up tilt in suspected vasodepressor syncope
AU - Calkins, Hugh
AU - Kadish, Alan
AU - Sousa, Joao
AU - Rosenheck, Shimon
AU - Morady, Fred
PY - 1991/1/15
Y1 - 1991/1/15
N2 - Head-up tilt is known to play an important role in establishing the diagnosis of vasodepressor syncope in patients with syncope of unknown etiology.1-5 Although passive head-up tilt alone may trigger a vasodepressor response, recent studies show that an infusion of isoproterenol significantly increases the sensitivity of head-up tilt in reproducing vasodepressor syncope.1-5 However, isoproterenol is not endogenously produced and the role of endogenous catecholamines, such as epinephrine, in provoking vasodepressor syncope is unknown. Therefore, we compared the responses to isoproterenol and epinephrine during head-up tilt in patients suspected of having vasodepressor syncope.
AB - Head-up tilt is known to play an important role in establishing the diagnosis of vasodepressor syncope in patients with syncope of unknown etiology.1-5 Although passive head-up tilt alone may trigger a vasodepressor response, recent studies show that an infusion of isoproterenol significantly increases the sensitivity of head-up tilt in reproducing vasodepressor syncope.1-5 However, isoproterenol is not endogenously produced and the role of endogenous catecholamines, such as epinephrine, in provoking vasodepressor syncope is unknown. Therefore, we compared the responses to isoproterenol and epinephrine during head-up tilt in patients suspected of having vasodepressor syncope.
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U2 - 10.1016/0002-9149(91)90447-S
DO - 10.1016/0002-9149(91)90447-S
M3 - Article
C2 - 1987725
AN - SCOPUS:0026059553
SN - 0002-9149
VL - 67
SP - 207
EP - 209
JO - The American journal of cardiology
JF - The American journal of cardiology
IS - 2
ER -