Without seeing the results of the Holter monitor, it is difficult for me to say exactly what the source of her PACs is. However, it sounds to me that the early beats continued without stimulant therapy, which means that they are likely unrelated. That said, stimulants can increase the propensity to have PACs (or PVCs) if you already have them. I am a little confused, though, about treatment for this. If she doesn't have a prolonged sustained tachyarrhythmia, such as supraventricular tachycardia (SVT), brief runs of 3-4 PACs are not life-threatening (unless she has a structurally abnormal heart). She certainly may be at risk for developing SVT, but if she has a structurally normal heart, it will be a nuisance and is also typically not life-threatening. The natural history of it is for it not to spontaneously resolve. Therefore, it can be treated with observation, medications for prophylaxis (which ends up being life-long), or with a special procedure called an electrophysiology study with radiofrequency ablation.
If you are not comfortable with the care that she is receiving, it would be important to consider a second opinion, especially one from a pediatric electrophysiologist, a pediatric cardiologist who specializes in electrical problems with the heart.
Thank you so much. She has a structurally normal heart, I have been told. I will take your advice and request a referral to a pediatric electrophysiologist.
Yes, thank you. Her cardiologist has since taken her off all medications and has deferred to the PCP for further management. The cardiologist suggested possibly a nonstimulant medication or nothing at all. The problem now lies with the public school accepting the responsiblity to teach her with her ADHD.
Listen to your cardiologist. He/she knows best - not what you read online or hear from others. Unless I am mistaken, you and the people you are talking to online didn't go to medical school and complete years of residency training, etc. If an M.D. says your child's life could be at risk - don't you think you should follow their advice? Real or potential heart issues are NOTHING to fool around with - ever.