Is the twitching in calves and body, r blood vessels saying a heart rhythm problem. mri norm, emg norm stress test norm echo norm, triglycerides 260?

Muscle twitching.: You are likely describing fasciculations. There are different causes for these, most are benign but there is a group of diseases (eg, ALS). A normal EMG goes against those. It seems from the work-up your doctor has done so far that the most likely diagnosis is benign fasciculation syndrome (BFS). If it is BFS, there is no need for treatment. See your doctor for confirmation of the diagnosis.

Twitching: Twitching is a symptom that occurs in the muscles. Many causes are benign and limited. It is a good idea to check electrolyes, like calcium and sodium. Likely this has been done. It is not likely this is caused by a heart problem. You have had several tests that indicate all systems are normal. This is a good sign, and you may just have benign muscle twitching, or fasciculations.