Hello. I went to the cardiologist today and had both an electro cardiogram and an echo cradiogram done. I ve had a heart murmer since my birth, though I am not sure exactly what kind it is. However, I do know for a fact that it is an innocent murmur, and that I should expect to outgrow it within the next few years. I am fifteen by the way. Now, I have smoked marijuana several times. I began this year. Usually it went fine. Then when i began to do it more frequently and at higher doses, I would feel the increased heart-rate, panic, etc. I realize this is normal. But i once fainted for a few seconds as a result of standing up too quickly while high. I understand that this is brought about by a rapid decrease in blood pressure? That s only happened once though. Other side effects have been a slight cold/fuzzy feeling in the left chest at the very beginning of the buzz, which goes away shortly. My question is if I can safely use marijuana in moderation, like once a month or probably less. How does my heart murmur play into all of this? Thank you.