We conducted a population-based, case-control study of risk factors for first events of coronary heart disease in patients with high blood pressure. All subjects had hypertension treated with medication. The 248 cases presented with new coronary heart disease from 1982 through 1984, and the 737 controls were a probability sample of health maintenance organization patients free of coronary heart disease. The health maintenance organization's computerized pharmacy database identified recent stoppers—patients who did not fill their prescriptions regularly enough to be at least 80% compliant. After adjustment for potential confounding factors, subjects who had recently stopped using β-blockers had a transient fourfold increase in the relative risk of coronary heart disease (relative risk, 4.5; 95% confidence interval, 1.1 to 18.5). The association was specific to β-blockers but not diuretics. A withdrawal syndrome immediately following the cessation of β-blocker use may be an acute precipitant of angina and myocardial infarction in hypertensive patients who have no prior history of coronary heart disease.
Psaty BM, Koepsell TD, Wagner EH, LoGerfo JP, Inui TS. The Relative Risk of Incident Coronary Heart Disease Associated With Recently Stopping the Use of β-Blockers. JAMA. 1990;263(12):1653–1657. doi:10.1001/jama.1990.03440120075040
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