منابع مشابه
Failure of propranolol to prevent tilt-evoked systemic vasodilatation, adrenaline release and neurocardiogenic syncope.
In patients with neurocardiogenic syncope, head-up tilt often evokes acute loss of consciousness accompanied by vasodilatation, increased plasma adrenaline and systemic hypotension. Since hypotension increases adrenaline levels and adrenaline can produce skeletal muscle vasodilatation by activating beta2 receptors, adrenaline might induce a positive feedback loop precipitating circulatory colla...
متن کاملAdrenaline and nocturnal asthma.
OBJECTIVE To determine whether the nocturnal fall in plasma adrenaline is a cause of nocturnal asthma. DESIGN Double blind placebo controlled cross-over study. In the first experiment the nocturnal fall in plasma adrenaline at 4 am was corrected in 10 asthmatic subjects with an infusion of adrenaline after parasympathetic blockade with 30 micrograms/kg intravenous atropine. In the second expe...
متن کاملIntra-tracheal adrenaline.
result in the catheter and needle hitting the dura at different points. This would explain the low incidence of subarachnoid catheterization when the needle is not turned. of four subarachnoid solutions in a needle through needle technique for elective Caesarean section. Single space combined spinal-extradural technique for analgesia during labour. Sir,—McCrirrick and Monk [1] provided interest...
متن کاملCorory vasodilatation following diazepam (Valium).
1. The effects of diazepam (Valium) on coronary and systemic vascular resistance were studied in anaesthetized dogs on cardiopulmonary bypass under conditions of constant heart rate and aortic pressure.2. Pharmacological doses of diazepam uniformly produced coronary vasodilation lasting 30 min; systemic vascular resistance also decreased, but to lesser degree.3. When coronary blood flow was mai...
متن کاملAdrenaline in Cataract Surgery.
SIRs,-I have read with interest.the paper by Mr. E. Epstein on the use of acrylic lenses in cataract surgery (Brit. J. Ophthal., 1959, 43, 29). I have had no experience with acrylic lenses, but I should like to comment on the instillation of 1 in 1,000 adrenaline drops into the anterior chamber which he mentions. I did this to dilate an inconveniently small pupil some years ago and during the n...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1929
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1929.sp002575