I have a history of heart problems in my immediate family, father, grandfather, my grandmother died from heart complications a few years ago. When I abused dexedrine this past spring I definitley felt very obvious heart palpitations and chest pain. Also a lot of shooting pains up and down my right arm...which I tend to experience when I smoke cigarettes more....I don't really know if thats related.
When I take MDMA I dont feel any rise in blood pressure or heart palpitations during / day after. MDMA does not raise your heart rate a significant amount. I probably get a higher blood pressure from a lot of caffeine.
The one time I took a pipe I was up all night even though I dosed at around 10pm. I was laying in bed after a rave and even though I had been dancing all night I couldn't fall asleep. I had major anxiety and thought I was going to die. My pupils were large until 8 in the morning and my heart was racing all night.
I suggest being extremely careful of getting piped because taking unknown stimulants can be extremely hazardous to your health.