RT Book, Section A1 Teitel, David F. A2 Kline, Mark W. SR Print(0) ID 1182913534 T1 The Neonate and Infant with Cardiovascular Disease T2 Rudolph's Pediatrics, 23e YR 2018 FD 2018 PB McGraw-Hill Education PP New York, NY SN 9781259588594 LK accesspediatrics.mhmedical.com/content.aspx?aid=1182913534 RD 2024/04/18 AB Cardiac defects are the most common congenital malformation, occurring in up to 1% of all live births (even excluding bicuspid aortic valve and very small atrial and muscular ventricular septal defects), and present symptomatically in about 20% of such neonates. It is thus essential that the clinician diagnose symptomatic cardiac disease expeditiously. Because of the concern for serious cardiac disease, many clinicians consider the presence of a murmur as the most definitive evidence of heart disease. A murmur, however, is not an accurate sign of symptomatic neonatal heart disease. Many normal neonates have murmurs at some time during the first few days of life, whereas several common symptomatic cardiac defects, such as total anomalous pulmonary venous connection and simple transposition of the great arteries, are not associated with murmurs. In the neonatal period, the presence of a murmur is neither sensitive nor specific to the diagnosis of heart disease, yet it is commonly used both to consider and, most concerning, to exclude the presence of a significant cardiac defect.