Reversible cardiomyopathy.

We report a case of reversible dilated cardiomyopathy, in a middle-aged male. The patient presented with severe left ventricular dysfunction and atrial fibrillation. Inspite of vigorous medical therapy there was only mild clinical improvement. Subsequently laboratory test results diagnosed it as hyperthyroidism and then specific thyrostatic treatment was added. There was a prompt clinical and hemodynamic improvement in the form of reversal of left ventricular dysfunction and achievement of sinus rhythm at the end of two weeks.