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J Am Heart Assoc. 2020 Dec;9(23):e017317. doi: 10.1161/JAHA.120.017317. Epub 2020 Nov 19.

Twenty-Four-Hour Cardiovascular Effects of Electronic Cigarettes Compared With Cigarette Smoking in Dual Users.

Journal of the American Heart Association

Neal L Benowitz, Gideon St Helen, Natalie Nardone, Newton Addo, Junfeng Jim Zhang, Arit M Harvanko, Carolyn S Calfee, Peyton Jacob

Affiliations

  1. Clinical Pharmacology Research Program Division of Cardiology Department of Medicine University of California San Francisco CA.
  2. Center for Tobacco Control Research and Education University of California San Francisco CA.
  3. Tobacco Center of Regulatory Science University of California San Francisco CA.
  4. Global Health Institute & Nicholas School of the Environment Duke University Durham NC.
  5. Duke Cancer Institute Duke University Durham NC.
  6. Division of Pulmonary Critical Care Allergy and Sleep Medicine Department of Medicine University of California San Francisco CA.
  7. Department of Anaesthesia University of California San Francisco CA.
  8. Department of Psychiatry University of California San Francisco CA.

PMID: 33208019 PMCID: PMC7763797 DOI: 10.1161/JAHA.120.017317

Abstract

Background Cardiovascular safety is an important consideration regarding the benefits versus risks of electronic cigarette use (EC) for public health. The single-use cardiovascular effects of EC have been well studied but may not reflect effects of ad libitum use throughout the day. We aimed to compare the circadian hemodynamic effects as well as 24-hour biomarkers of oxidative stress, and platelet aggregation and inflammation, with ad libitum cigarette smoking (CS) versus EC versus no tobacco product use. Methods and Results Thirty-six healthy dual CS and EC users participated in a crossover study in a confined research setting. Circadian heart rate, blood pressure and plasma nicotine levels, 24-hour urinary catecholamines, 8-isoprostane and 11-dehydro-thromboxane B2, and plasma interleukin-6 and interleukin-8 were compared in CS, EC, and no nicotine conditions. Over 24 hours, and during daytime, heart rate and blood pressure were higher in CS and EC compared with no tobacco product conditions (

Keywords: biomarkers; electronic cigarettes; nicotine; tobacco

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