![]() Accounts for ~20% of supraventricular arrhythmias in this age group.Atrial Flutter in neonates usually is noted within first ~7 days of life.Perinatal atrial flutter is associated with ~9% mortality.Atrial Flutter can be diagnosed in utero.While rare, Atrial Flutter can be seen in fetuses, neonates, and adolescents.Atrial Flutter is rare in children WITHOUT organic heart disease.Ītrial Flutter in Children: Presentations.Increased Atrial size (from increased pressures).Electrolyte disturbances and abnormal myocardium may exacerbate this mechanism.The reentry loop can create a closed-loop circuit if there is unidirectional block within it and conditions disrupt conduction.In children, the reentry loop is often associated with an abnormal atrial architecture.In adults, this loop may develop from ischemic heart disease or heart surgery.Adenosine will not slow the atrial rate, but will affect the ventricular response.Ītrial Flutter requires abnormal structure and conduction.The F waves may be difficult to see initially on ECG, due to accelerated ventricular response.Regular QRS that is slower than F waves.Absence of isoelectric line between F Waves in limb leads.Flutter (F) waves is a “sawtooth” shape.2:1, 3:1, 4:1 blocks occur leading to slower, regular ventricular rhythm.Often too fast for the AV node, so a physiologic AV block develops.Most often with atrial rates from 250 to 350 beats/min.In children, the atrial rate is faster than than seen in adults.Atrial Flutter in Children: Basics Atrial Flutter is a cardiac arrhythmia with fast and regular atrial depolarization.
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