Hello and welcome to health care magic,
You must realize that whether it causes any changes which are visible in the EKG, ecstasy
is not a drug recommended for routine consumption. In any case the changes are usually subtle and by the time the damage is seen in tests it is usually too late so my advice to you is to of course stop using the same immediately.
Also it may be helpful to consult a cardiologist
and also try placing this question in the Drug abuse
section and heart disease
section of our site
Dr Sriram Nathan