Hemodynamic analysis during isoproterenol-induced vasovagal syncope.
An isoproterenol-mediated increase in cardiomotor tone and a decrease in afterload contribute to the induction of vasovagal syncope. Contrary to conventional belief, a significant decrease in preload is not observed immediately before isoproterenol-induced syncope.
Shen
W K
WK
Department of Neurology, Mayo Clinic and Mayo Foundation, Rochester, Minnesota 55905, USA.
Fenton
A M
AM
Lohse
C M
CM
Bailey
K R
KR
Low
P A
PA
Hammill
S C
SC
D000293:Adolescent; D000328:Adult; D000368:Aged; D002316:Cardiotonic Agents / Q000008:administration & dosage / Q000009:adverse effects*; D005260:Female; D006439:Hemodynamics / Q000187:drug effects*; D006801:Humans; D007262:Infusions, Intravenous; D007545:Isoproterenol / Q000008:administration & dosage / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D019462:Syncope, Vasovagal / Q000139:chemically induced* / Q000503:physiopathology; D018667:Tilt-Table Test
D002316:Cardiotonic Agents; D007545:Isoproterenol