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Her EKG (Electrocardiogram) shows Q waves in III AVF (Arteriovenous fistula), and no significant ST T abnormalities are seen. These Q waves mean there might be a possibility of an old heart attack. So she should undergo an ECHO to rule out the case of an old heart attack. However, since this not a standard EKG, the reliability is questionable, and a standard 12 lead EKG is required. But there are no ST T abnormalities, which means there are no new or recent changes. So, EKG is fine, and her symptoms may not be cardiac (however, since this is 6 L EKG, it can miss some findings). Does she have any gastric symptoms like bloating, burping, or upper abdominal pain, which could explain her heaviness? or does she have tenderness over the chest on applying pressure (which suggests the possibility of local musculoskeletal causes)? Cardiac heaviness would classically increase or come on exertion and relieves with rest. BP target should be 110 to 130 systolic, and accordingly, you may adjust the Losartan dose. You may add Losartan 25 mg additional in the evening if BP remains above 130 systolic, which would also avoid such accelerated hypertension. Avoid consuming NSAIDs (Nonsteroidal anti-inflammatory drug) or pain killers, which could precipitate accelerated hypertension. I hope this helps you and get back if you have any doubts.