TY - CHAP M1 - Book, Section TI - Premature Beats A1 - Hay, Jr, William W. A1 - Levin, Myron J. A1 - Deterding, Robin R. A1 - Abzug, Mark J. PY - 2017 T2 - Quick Medical Diagnosis & Treatment Pediatrics AB - Atrial premature beatsTriggered by an ectopic focus in the atriumOne of the most common premature beats occurring in pediatric patients, particularly during the fetal and newborn periodsJunctional premature beats: Arise in the atrioventricular node or the bundle of HisVentricular premature beatsSometimes referred to as premature ventricular contractions (PVC) or as ventricular ectopyRelatively common, occurring in 1%–2% of patients with normal heartsCharacterized by an early beat with a wide QRS complex, without a preceding P wave, and with a full compensatory pause following this early beatMultifocal ventricular premature beatsAlways abnormal and may be more dangerousMay be associated with drug overdose (tricyclic antidepressants or digoxin toxicity), electrolyte imbalance, myocarditis, or hypoxia SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/29 UR - accesspediatrics.mhmedical.com/content.aspx?aid=1145458122 ER -