TY - CHAP M1 - Book, Section TI - Dysrhythmias A1 - Doniger, Stephanie J. A2 - Tenenbein, Milton A2 - Macias, Charles G. A2 - Sharieff, Ghazala Q. A2 - Yamamoto, Loren G. A2 - Schafermeyer, Robert PY - 2019 T2 - Strange and Schafermeyer's Pediatric Emergency Medicine, 5e AB - Dysrhythmias are classified according to the heart rate, QRS width, and the patient’s 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.An accessory pathway is the most common mechanism for PSVT in the child. Digoxin may precipitate ventricular tachycardia (VT), and therefore should only be used under the supervision of a pediatric cardiologist.Atrial fibrillation or atrial flutter associated with accessory pathway disease or hypertrophic cardiomyopathy (HC) puts a child at high risk for 1:1 conduction abnormalities, ventricular tachycardia, and sudden death.Either amiodarone or lidocaine may be used for shock-refractory ventricular fibrillation and ventricular tachycardia.Concerning risk factors for hypertrophic cardiomyopathy (HCM) and sudden death include a family history of sudden death, exercise-induced symptoms, and a murmur on physical examination. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1155297288 ER -