Hey everyone, just wondering if often use of marijuana can weaken my heart? Sometimes my chest is really tight after smoking, and occasionally my heart will feel like it's tightening one of its valves. I have the constant need to rub my chest. That's probably because I'm really stoned though. I smoke 2-3 sessions a day with my friend, usually bong/gravity bong, I just feel like I'm ripping through my heart/lungs. This has been pretty constant for the past 1-2 years as well. Should I see the doctor at the University do you think? I'll probably stop smoking for a bit while studying for exams. Any thoughts would be appreciated.