can cigarettes cause heartburn is not really coming from your heart. It is caused by acid reflux (stomach acid rising into your esophagus which is the tube that connects your throat to your stomach). If Chest Pain Caused by Smoking:

Ophthalmology 122 , 12571261 (2015)

And one of the reasons why I keep on going back to make movies that don't have such huge budgets is that it's not as much pressure

Some systems can carry smoke further than you think, while others might dilute it enough to sneak under the radar.The type of detector matters too, big time

And a world where less harmful alternative forms, efficiently delivering satisfying levels of nicotine, are available for those adults who need or want them. Instead, the FDA prioritized very low-nicotine cigarettes and dropped the ball on that last, essential part: the less harmful alternative forms. Those products, despite considerable and growing scientific evidence of their real-world effectiveness, have been left in limbo