Atrial fibrillation occurs in all except
Mitral stenosis
Hypothyroidism
Dilated cardiomyopathy
Mitral regurgitation
Atrial fibrillation can occur in hypehyroidism, not hypothyroidism. Other causes are: CAD Valvular hea diseases Hypeension Sinoatrial disease Alcohol Cardiomyopathy Congenital hea disease Chest infection Pulmonary embolism Pericardial disease Idiopathic Reference Harrison 20th edition pg 1433
C.V.S