You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is b -blockers are used in all except? and explain in detail?
Ans. is 'c' i.e., Variant angina We all know that attacks of variant angina occur due to coronary vasospasm. So, the drugs which relieve coronary vasospasms will be used in variant angina (C.C.B.'s, Nitrates) b blockers are contraindicated in these patients because 13 blockers, instead of dilating the coronary aeries constrict the coronary aeries (due to unopposed a mediated constriction). Remember, blockers are useful in classical angina. (They cause ourable redistribution of blood)