Impaired cardiac function: Chronic coronary disease and myocardial infection, increased cardiac workout ie hypertension and valvular disorders, Acute non-cardiac conditions like hyperthyroidism, fever, infection, others like Diabetes, sleep apnoea, alcohol and tobacco use, obesity, *medications-antidiabetic Thiazolidinediones (TZD): Rosiglitazone, Pioglitazone, NSAIDs etc.
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