Guess what, tobacco was deemed safe when it was first brought to western society and had been used for thousands of years before that.
You guys can take that study with a grain of salt but I can personally say, as a person that was recently diagnosed with borderline qtc, that I began getting chest pains on kratom aswell as cold sweats and getting out of breath from just climbing the stairs.
That's when I googled kratom and arrhythmia's and found that medical study on mitrigayne and it scared me so I immediately quit, and the chest pains went away and I wasn't getting out of breath anymore. My kratom was always from established and trusted vendors.
I also noticed an odd rhythm to my heart beat as well once these side effects appeared along with an oddly low resting heart rate compared to before I switched to kratom to get off heroin and other opiates.
So I really believe that certain people with heart problems really shouldn't be taking kratom. That study seems to imply that mitragayne effects sodium or potassium channels in your heart, which is what makes Demerol and methadone cardiotoxic to some people and why methadone patients are supposed to have regular ekg's done to check for abnormal heart problems that came out of no where until the use of methadone maintenance.
My mom also felt really awful when I gave her a low dose of kratom and experienced chest pains along with feeling weak and dizzy from the kratom.
My mom and both my grandparents on her side of the family have heart problems aswell so I likely inherited them. I'm never using kratom again.
Yeah, it makes a lot of sense that you wouldn't, because you have a lot of factors linking you to heart problems.
If a person DOESN'T though, then I'm not sure that this study proves that plain leaf Kratom in vivo can have the same effects as pure Mitragynine in vitro.
I guess we'll just have to see more studies done and everyone will have to make their own decisions.