heart diseases caused by smoking cigarettes doesn't just harm your lungs — it directly damages your heart. It narrows arteries, raises blood pressure, increases rate, promotes dangerous blood clots, and reduces oxygen reaching the heart. Quit Smoking causes heart disease -

Heterogeneity in the measurement and reporting of outcomes in studies of electronic cigarette use in adolescents: A systematic analysis of observational studies

That would make sense

At this time, the scope and timing of further FDA actions are unclear, but the agency appears to be taking a more active role in ecigarette regulation than it had in the past

Infectious gastroenteritis and risk of developing inflammatory bowel disease

Evidence of association between smoking and alpha7 nicotinic receptor subunit gene in schizophrenia patients

To date, there have only been two in vivo studies reported that have utilised an acute exposure experimental methodology involving a heated tobacco product