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Hypertension is a known risk factor for atrial fibrillation. To assess and compare the relative risk for incident AF among patients taking different classes of antihypertensive drugs, investigators used a British general practice database to conduct a nested case-control analysis. All participants had hypertension diagnoses and had received one or more prescriptions for an ACE inhibitor, angiotensin-receptor blocker, beta-blocker, calcium-channel blocker, diuretic, or any combination of these drugs.
Of a total of 682,993 antihypertensive drug recipients, 4661 were diagnosed with AF and met inclusion criteria for the analysis. Almost two thirds of the case patients were 70 or older at first AF diagnosis. The investigators randomly identified …