Vasoconstriction
‘Lack of quality evidence’ to support prolonged vasoconstrictor use for variceal bleeding
PHILADELPHIA — Use of vasoconstrictors for up to 120 hours following endoscopic variceal ligation for acute variceal bleeding failed to demonstrate additional benefits vs. early discontinuation, according to data.
AHA issues recommendations for patients with CVD planning high-altitude activities
Because sudden cardiac death can occur in patients with CVD traveling to higher altitudes, experts recommended in a new American Heart Association scientific statement that patients with CVD consult a physician before travel.
Study explores retinal effects of energy drinks
The consumption of energy drinks leads to acute, reversible changes in retinal vascular density parameters, according to a study presented at the virtual Euretina meeting.
Oral arginine therapy appears safe, effective for sickle cell disease pain management
ORLANDO — Oral supplementation with arginine resulted in faster resolution of pain associated with vaso-occlusive episodes among younger patients with sickle cell disease, according to the results of a randomized phase 2 trial presented at ASH Annual Meeting and Exposition.
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Alpha Agonists
Alpha receptor agonists are substances that activate the sympathetic nervous system by stimulation of alpha receptors, similar to the effects of epinephrine and norepinephrine.
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Epinephrine
Epinephrine (adrenaline) is a hormone that is mediated predominantly through the sympathetic nervous system and acts by stimulating alpha and beta receptors.