A study on unfiltered coffee found that consumption resulted in mean increases of 11.9 mg/dL for low-density lipoprotein cholesterol and 18.8 mg/dL for triglyceride concentrations. The effects of coffee on serum lipoprotein concentrations largely depend on how it is prepared.
A randomized, controlled trial found that consuming high doses of caffeine did not increase arrhythmias in patients with chronic systolic heart failure. No significant association was found between an intake of 500 mg of caffeine over a 5-hour period and ventricular premature beats or supraventricular premature beats.
A study that analyzed data on more than 6500 patients found a neutral association between regular coffee and caffeine consumption and coronary artery calcium and incident cardiovascular outcomes. The patients represented a multiethnic cohort, and researchers concluded that such caffeine consumption was supported as part of a heart-healthy diet as recommended by the American Heart Association.
A report evaluating the scientific literature on caffeine with regard to potential cardiovascular outcomes found that typical, moderate caffeine intake is not associated with increased risk for hypertension in baseline populations. Such intake is also not associated with an increased risk for total cardiovascular disease, arrhythmia, heart failure, or blood pressure changes among regular coffee drinkers.
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Cite this: Mary L. Windle. Fast Five Quiz: Caffeine Facts vs Fiction - Medscape - Sep 04, 2019.