Introduction Atrial fibrillation (AF) is a major cardiovascular health problem: it is common. chronic and incurs substantial healthcare expenditure because of stroke. Oral anticoagulation reduces the risk of thromboembolic stroke in those at higher risk; but for a number of patients. stroke is the first manifestation of undetected AF. https://www.klinikasmaulhusna.com/product-category/hybrid-lubricants/