Introduction
Introduction Jaundice is the most common and one of the most vexing problems that can occur in the newborn. As Hansen points out in an elegant historical review (1), “neonatal…
Second-Degree Atrioventricular Block
Second-Degree Atrioventricular Block Second-degree AV block is defined as intermittent failure of conduction of some atrial depolarizations to the ventricles. Second-degree AV block is subdivided into Mobitz type I (Wenckebach)…
Atrioventricular Block
Atrioventricular Block First Degree Atrioventricular Block First degree A-V block is characterized by an abnormally prolonged P-R interval for age and heart rate. Most commonly, this is as a result…
Junctional Ectopic Tachycardia
Junctional Ectopic Tachycardia Junctional ectopic tachycardia is a rare, often incessant, tachyarrhythmia due do to enhanced automaticity in the A-V node or bundle of His. There is generally a normal…
Accelerated Ventricular Rhythm
Accelerated Ventricular Rhythm An accelerated ventricular rhythm is a less common arrhythmia. There is a wide QRS rhythm, generally at a rate not more than 10% greater than the underlying…
Cyanotic Lesions
Cyanotic Lesions The differential diagnosis of cyanotic heart disease includes many disorders (Table 33-12). Lesions usually associated with decreased pulmonary flow include the tetralogy of Fallot, pulmonary stenosis, tricuspid atresia,…
Sinus Arrhythmia
Sinus Arrhythmia Sinus arrhythmia is the most common cause of an irregular heart rate and rhythm, that is more prominent at slower heart rates, such as in older infants. It…
Arrhythmias
Arrhythmias All forms of cardiac arrhythmias can occur in the fetus or newborn. Those most commonly encountered include sinus tachycardia and bradycardia, premature atrial depolarizations, supraventricular tachycardia; and less commonly,…
Acyanotic Anomalies with Abnormal Cardiac Function or Structure
Acyanotic Anomalies with Abnormal Cardiac Function or Structure Cardiomyopathy Sick neonates without cardiac anatomic anomaly often develop symptoms of cardiac and myocardial dysfunction. Systolic and/or diastolic dysfunction most often occur…
Acyanotic Lesions
Acyanotic Lesions Acyanotic diseases associated with normal pulmonary flow include those with systemic outflow obstruction such as coarctation of the aorta and aortic stenosis, mild and moderate pulmonary outflow stenosis,…
