The response of the body to this heat distribution is peripheral vasoconstriction
, and this response mechanism is suppressed in a dose-dependent manner in patients undergoing general anaesthesia (1).
These very premature babies have more pulmonary vasoconstriction
, which shunts more blood toward the brain.
Pseudoephedrine is a readily available OTC nasal decongestant which alleviates symptoms of nasal congestion via vasoconstriction
of nasal blood vessels.4 However, if used in greater dosages, it can result in psychomotor stimulation within the central nervous system owing to its structural similarity with psychostimulant amphetamine.4 We discuss implications of this recall on the drug situation in Pakistan.
In winter the inhalation of extreme cold air causes vasoconstriction
of peripheral blood vessels that may cause problems for chronic patients including heart patients.
Body's Protective Mechanisms May Underpin Link Previous studies also have shown a strong association between cold weather and heart attack risk, and it's possible that peripheral vasoconstriction
may play a role.
Rimegepant represents a novel mechanism that targets the underlying pathophysiology of migraine without causing vasoconstriction
. CGRP receptor antagonists offer an alternative to current agents, particularly for patients who have contraindications to the use of triptans, such as those with underlying cardiovascular diseases.
Another explanation why we feel cold is because when you're scared or anxious your brain goes into "fight or flight" and undergoes vasoconstriction
which reduces blood flow to your skin, fingers and toes and redirects them to large muscles that will help you get ready for action.
To the Editor: Reversible cerebral vasoconstriction
syndrome (RCVS) is well characterized by severe headaches, with or without other acute neurological symptoms, and diffuse segmental vasoconstriction
of cerebral arteries, which resolves within 3 months.
Hypoxic pulmonary vasoconstriction
(HPV) is a protective and self regulating mechanism of the pulmonary circulation system in hypoxia, which can greatly reduce the proportion of the pulmonary blood flow to the cardiac output, and improve the pulmonary blood flow under ventilation, and stabilize the PaO2.3,4 HPV can be influenced by various factorssuch as different anesthesia and drugs,5 however, there is limited robust information about how HPV regulate itself independently and pathological changes of one lung ventilation up to three hour, especially under different anesthesia.
In 1971, Mike published his first landmark paper on this topic in The Lancet  By employing the innovative 133Xe washout technique, Mike and colleagues clearly demonstrated for the first time that a decrease in creatinine clearance is invariably associated with significant cortical hypoperfusion, likely attributable to active vasoconstriction
of the cortical vessels.
TUESDAY, June 12, 2018 (HealthDay News) -- White matter hyperintense lesions (WMHs) in patients with reversible cerebral vasoconstriction
syndrome (RCVS) change over time in a manner that parallels disease severity, according to a study published online June 4 in JAMA Neurology.
However a CT scan showed several arteries in the man's brain had constricted and he was diagnosed with reversible cerebral vasoconstriction