7

A large study of ~8000 patients suggests there is no real benefit to prophylactic oxygen supplementation after acute stroke (Roffe et al., 2017). American Heart Association/American Stroke Association guidelines (Powers et al., 2018) are for oxygen only for hypoxic patients, with limited evidence of benefit but no evidence of harm. Hyperbaric oxygen is only ...


6

Cocaine use is known to cause gastric ischemia or even perforation (in a 19 year old female student with epigastric pain PubMed, 2010) and in another 5 relatively young people (PubMed, 1991), or intestinal ischemia (PubMed, 1999). When there are no symptoms that would differ from those in food poisoning or infectious gastroenteritis, cocaine use alone should ...


3

Your understanding about the mechanism by which the K+ ions leak out of the cardiac cell during ischaemia is correct. But, regarding the latter part, lets discuss what is the situation of K+ ions in a normal cardiac cell. In a normal cardiac cell, the concentration of K+ ions is more inside compared to the outside of the cell (150mM inside as compared to 4mM ...


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