Atrial Fibrillation

AF is the most common cardiac arrhythmia and involves the two upper chambers (atria) of the heart. It is caused by multiple reentrant waveforms within the atria, which bombard the atrioventricular node, commonly leading to a tachycardia that is irregularly irregular. Blood isn't pumped completely out of them, so it may pool and clot, resulting in stroke if clot leaves the heart and becomes lodged in an artery in the brain. Risk factors for AF include age, male sex, hypertension, valvular heart disease, left ventricular hypertrophy, coronary artery disease, diabetes mellitus, smoking and any form of carditis...

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