My child went in for a tonsillectomy. Everything went good, except she now has arrhythmia.. Her heart beats irregular and gets worse when she is sleeping. She shows no signs of being dizzy, she doesn't faint , She appears to be a healthy little girl. I believe that before she went into surgery her heart was fine. After being in ICU for 3 days we were sent to and was told after she heals she will come back for more test. Has this happened to anyone else or does anyone know anything about this?