If a heart arrhythmia is found early, your treatment may be easier and more effective. Eventually, however, you may be referred to a doctor trained in heart conditions (cardiologist). If your heart arrhythmia persists for more than a few minutes or is accompanied by fainting, shortness of breath or chest pain, call 911 or your local emergency …
https://www.mayoclinic.org/diseases-conditions/heart-arrhythmia/diagnosis-treatment/drc-20350674

