Hello mem, Good afternoon, I read yoyr history twice... You have doubts about aspirin low dose is workfull or not...? Mem let me first introduce aspirine shortly... It is well known NSAIDs which main mechanism of action is preventing synthesis of prostaglandins...n additional to this it has some additional effect on blood as a anticoagulant... Now anticoagulant efect is seen in low dose...while pain killer effect is seen in slight much higher dose... Your husband has atrial fibrillation so he has much chance of throbosis n tia etc...so as a preventive precaution your physcian started aspirine low dose... Similarly for hypertention lisinopril n metoprolol... Plus there is much chance of ccf or pulmonary oedema n other symptoms due to this...fluid rentention or overload... So your physcian started frusemide diuretics n metoprolol beta blocker...that helps him in this area... So according to my knowledge your husband has been given treatment in right way... Thank you, Regards, Hope that your husband ll cure as soon as possible... Dr.Ravi Kotecha