TY - CHAP M1 - Book, Section TI - Dysrhythmias A1 - Doniger, Stephanie J. A2 - Schafermeyer, Robert A2 - Tenenbein, Milton A2 - Macias, Charles G. A2 - Sharieff, Ghazala Q. A2 - Yamamoto, Loren G. PY - 2014 T2 - Strange and Schafermeyer's Pediatric Emergency Medicine, 4e AB - Dysrhythmias are classified according to rate, QRS width, and clinical stability.Sinus bradycardia in the neonate always requires aggressive evaluation and treatment.Infants with paroxysmal supraventricular tachycardia (PSVT) may present in a low output state with irritability, poor feeding, tachypnea, and diaphoresis.The presence of an accessory pathway is the most common mechanism for PSVT in the child, but is difficult to appreciate during PSVT. Digoxin may precipitate ventricular tachycardia (VT) and is only used under the supervision of a pediatric cardiologist.Atrial fibrillation or flutter associated with accessory pathway disease or hypertrophic cardiomyopathy (HC) puts a child at high risk for 1:1 conduction, ventricular tachycardia, and sudden death. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1105682519 ER -