Pediatric Cardiology The Essential Pocket Guide Pediatric Cardiology The Essential Pocket Guide THIRD EDITION Walter H. Johnson, Jr., MD Professor of Pediatrics Department of Pediatrics Division of Pediatric Cardiology University of Alabama at Birmingham Birmingham, AL, USA James H. Moller, MD Professor Emeritus of Pediatrics Adjunct Professor of Medicine University of Minnesota Medical School Minneapolis, MN, USA This edition first published 2014 © 2014 by John Wiley & Sons, Ltd © 2008 by Blackwell Publishing Ltd Registered office: John Wiley & Sons, Ltd, The Atrium, Southern Gate, Chichester, West Sussex, PO19 8SQ, UK Editorial offices: 9600 Garsington Road, Oxford, OX4 2DQ, UK The Atrium, Southern Gate, Chichester, West Sussex, PO19 8SQ, UK 111 River Street, Hoboken, NJ 07030-5774, USA For details of our global editorial offices, for customer services and for information about how to apply for permission to reuse the copyright material in this book please see our website at www.wiley.com/wiley-blackwell The right of the author to be identified as the author of this work has been asserted in accordance with the UK Copyright, Designs and Patents Act 1988. All rights reserved. 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No warranty may be created or extended by any promotional statements for this work. Neither the publisher nor the author shall be liable for any damages arising herefrom. Library of Congress Cataloging-in-Publication Data Johnson, Walter H., Jr., author. Pediatric cardiology : the essential pocket guide / Walter H. Johnson Jr., James H. Moller. – Third edition. p. ; cm. Includes bibliographical references and index. ISBN 978-1-118-50340-9 (pbk.) I. Moller, James H., 1933– author. II. Title. [DNLM: 1. Heart Diseases–Handbooks. 2. Child. WS 39] RJ421 ′ 618.92 12–dc23 2013043842 A catalogue record for this book is available from the British Library. Wiley also publishes its books in a variety of electronic formats. Some content that appears in print may not be available in electronic books. Cover image: courtesy of Robb L. Romp, M.D. Cover design by Andy Meaden Set in 8/10pt Frutiger Light by Laserwords Private Limited, Chennai, India 1 2014 Contents Preface, vii 1. Tools to diagnose cardiac conditions in children, 1 2. Environmental and genetic conditions associated with heart disease in children, 73 3. Classification and physiology of congenital heart disease in children, 86 4. Anomalies with a left-to-right shunt in children, 95 5. Conditions obstructing blood flow in children, 148 6. Congenital heart disease with a right-to-left shunt in children, 186 7. Unusual forms of congenital heart disease in children, 233 8. Unique cardiac conditions in newborn infants, 245 9. The cardiac conditions acquired during childhood, 259 10. Abnormalities of heart rate and conduction in children, 291 11. Congestive heart failure in infants and children, 315 12. A healthy lifestyle and preventing heart disease in children, 329 Additional reading, 373 Index, 375 v Preface Since the first printing of this text 50 years ago, pediatric cardiac catheteriza- tion, echocardiography, and magnetic resonance imaging have developed and less emphasis has been placed on the more traditional methods of evaluating a cardiac patient. Most practitioners, however, do not have access to these refined diagnos- tic techniques or the training to apply them. To evaluate a patient with a finding that could suggest a cardiac issue, a practitioner therefore relies upon either the combination of physical examination, electrocardiogram, and chest X-ray, or refer- ral to a cardiac diagnostic center. This book formulates guidelines by which a practitioner, medical student, or house officer can approach the diagnostic problem presented by an infant or child with a cardiac finding. Through proper assessment and integration of the history, physical examination, electrocardiogram, and chest X-ray, the type of problem can be diagnosed correctly in many patients, and the severity and hemodynamics correctly estimated. Even though a patient may ultimately require referral to a cardiac center, the practitioner will appreciate and understand better the specific type of specialized diagnostic studies performed, and the approach, timing, and results of operation or management. This book helps select patients for referral and offers guidelines for timing of referrals. The book has 12 chapters: Chapter 1 (Tools to diagnose cardiac conditions in children) includes sections on history, physical examination, electrocardiography, and chest radiography, and discusses functional murmurs. A brief overview of special procedures, such as echocardiography and cardiac catheterization, is included. Chapter 2 (Environmental and genetic conditions associated with heart disease in children) presents syndromes, genetic disorders, and maternal conditions com- monly associated with congenital heart disease. Chapters 3 to 7 are “Classification and physiology of congenital heart disease in children,” “Anomalies with a left-to-right shunt in children” (acyanotic and with increased pulmonary blood flow), “Conditions obstructing blood flow in children” (acyanotic and with normal blood flow), “Congenital heart disease with a right- to-left shunt in children” (cyanosis with increased or decreased pulmonary blood flow), and “Unusual forms of congenital heart disease in children.” This set of chapters discusses specific congenital cardiac malformations. The hemodynam- ics of the malformations are presented as a basis for understanding the physical vii viii Preface findings, electrocardiogram, and chest radiographs. Emphasis is placed on features that permit differential diagnosis. Chapter 8 (Unique cardiac conditions in newborn infants) describes the cardiac malformations leading to symptoms in the neonatal period and in the transition from the fetal to the adult circulation. Chapter 9 (The cardiac conditions acquired during childhood) includes cardiac problems, such as Kawasaki disease, rheumatic fever, and the cardiac manifesta- tions of systemic diseases which affect children. Chapter 10 (Abnormalities of heart rate and conduction in children) presents the practical basics of diagnosis and management of rhythm disorders in children. Chapter 11 (Congestive heart failure in infants and children) considers the pathophysiology and management of cardiac failure in children. Medical and surgical (including transplantation) treatments are discussed. Chapter 12 (A healthy lifestyle and preventing heart disease in children) dis- cusses preventive issues for children with a normal heart (the vast majority), includ- ing smoking, hypertension, lipids, exercise, and other risk factors for cardiovascular disease that become manifest in adulthood. Prevention and health maintenance issues particular to children with heart disease are also discussed. This book is not a substitute for the many excellent and encyclopedic texts on pediatric cardiology, or for the expanding number of electronic resources. The ref- erences sections accompanying some chapters and the additional reading section at the end of the book include both traditional and online resources chosen to be of greatest value to readers. Certain generalizations are made. In pediatric cardiology, as in all fields, excep- tions occur. Therefore, not all instances of cardiac abnormality will be correctly diagnosed on the basis of the criteria set forth here.