The more serious type of arrhythmias occurs mostly to people who are 60 years old or older. Some types of arrhythmias can occur in young adults and children as well like paroxysmal supraventricular tachycardia. Arrhythmias can be treated. If your doctor diagnose you with arrhythmias, he/she will set up a treatment plan for you. Treatment of arrhythmias may include medicine, medical procedures(machines) , and surgery. Arrhythmias may be harmless if you take care of it and sometimes it may be unnoticeable until you go get a check up from your doctor.