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A study published in the Journal of the American Heart Association asserts that e-cigarettes with nicotine can damage the heart in nonsmokers with just one puff: researchers did blood tests and measured the subjects’ heart rhythms and found that participants had high levels of adrenaline in their hearts after they smoked e-cigs with nicotine, but not after they puffed on e-cigarettes without nicotine or empty e-cigs.
Dr. Holly R. Middlekauff, senior study author and a cardiologist at UCLA, and her colleagues found participants developed a pattern of abnormal “heart rate variability” (HRV), which is indicative of increased heart adrenaline levels after using the e-cigarette with nicotine only. These increased adrenaline levels were attributable to the inhaled nicotine and not the non-nicotine components in the e-cigarette aerosol. Nevertheless, the researchers did not find increased oxidative stress because they only looked at one marker, therefore this warrants further testing to support this finding.
Dr. Holly R. Middlekauff, senior study author and a cardiologist at UCLA, and her colleagues found participants developed a pattern of abnormal “heart rate variability” (HRV), which is indicative of increased heart adrenaline levels after using the e-cigarette with nicotine only. These increased adrenaline levels were attributable to the inhaled nicotine and not the non-nicotine components in the e-cigarette aerosol. Nevertheless, the researchers did not find increased oxidative stress because they only looked at one marker, therefore this warrants further testing to support this finding.