Went to cardiologist for skip beats, did ekg, said (extra electricity), prescribed betab, but potassium seem to help, i get random twitch everywhere (calf/thigh mainly), tightened leg feel, headache

Electrolytes: Electrolytes are a fancy term for salts & minerals, including but not limited to potassium, magnesium & calcium, in addition to plain ol' table salt, NaCl or sodium chloride. All these minerals need to be in balance for optimal function of muscles, including your heart. Perhaps your potassium is low (uncommon unless taking water pill or diuretic) which is why you feel better. Go see your FamilyDoc

Magic magnesium: Not completely clear on the dx, but one thing that might address your issues is magnesium glycinate starting at 400 mg and increasing up to 1000mg/d (too much causes loose stools). Work with your cardiologist and maybe you won't need a beta blocker. Make sure your diet is NOT PROCESSESED foods, rich in nuts and seeds, fruits and veggies. We may develop symptoms like this when we are deficient.