Fluttering sensation in the chest
Noisy gasping
Sudden death
Inherited abnormalities in the heart's electrical system
Low body potassium (hypokalemia)
Side effects of certain medication including antibiotics, antidepressants, and antipsychotics, Diuretics, antiarrhythmic medications, etc
Some medical condition
Cardiac Electrophysiologist
Cardiologist
Medical Geneticist
Pediatrician