Analysis of 114,404 adolescents and young adults (ages 11-24) reveals vaping increases heart rhythm abnormality risk by 82% compared to non-vapers, with hazard ratios reaching 1.97 in matched cohorts. The retrospective study used propensity score matching to control for baseline differences between 57,202 vapers and matched controls. This finding extends beyond vaping's well-established pulmonary risks to suggest significant cardiovascular consequences during critical developmental years. The magnitude of increased arrhythmia risk approaches that seen with traditional cardiovascular risk factors, potentially affecting millions of young vapers worldwide. However, as a retrospective observational study, it cannot establish causation—confounding factors like underlying health conditions, concurrent substance use, or genetic predisposition could influence results. The reliance on diagnostic codes rather than direct cardiac monitoring may also introduce detection bias. Since this preprint awaits peer review, these concerning findings require validation through prospective studies with objective cardiac assessments. If confirmed, the results would represent a paradigm shift in understanding vaping's health impact, moving from primarily respiratory to systemic cardiovascular concerns in youth populations.