Current Environment: Production

Medical Services

Specialties

Programs & Services

Languages

  • English

Education

Undergraduate School

Middlebury College

2004, Middlebury, VT

Medical School

Albert Einstein College of Medicine

2009, Bronx, NY

Internship

Boston Children's Hospital/Boston Medical Center

2010, Boston, MA

Residency

Boston Children's Hospital/Boston Medical Center

2012, Boston, MA

Fellowship

Cardiac Electrophysiology

Boston Children's Hospital

2016, Boston, MA

Certifications

  • American Board of Pediatrics (Cardiology)
  • American Board of Pediatrics (General)

Professional History

Dr. DeWitt completed medical school at Albert Einstein College of Medicine in the Bronx, NY, and then came to the Boston Combined Residency Program at Boston Children’s Hospital and Boston Medical Center for internship and residency in Pediatrics. She stayed on for Cardiology fellowship, during which time she served as Chief Fellow. She completed a senior fellowship in Electrophysiology at Boston Children’s Hospital. Dr. DeWitt is currently a member of the Electrophysiology Division at Boston Children’s Hospital. She takes care of patients with heart rhythm disorders, in both the inpatient and outpatient settings. She also performs arrhythmia ablations and pacemaker, defibrillator and implantable loop recorder implants. In addition, she cares for patients with inherited cardiomyopathies and associated arrhythmias, including arrhythmogenic cardiomyopathy. She is the Electrophysiology representative for the Heterotaxy Program and the Medical Director of the Surgical Electrophysiology Program, an intradisciplinary program that aims to improve outcomes for patients. The current focus of this clinical program and research efforts is to decrease postoperative heart block by using electrophysiology mapping to identify conduction tissue at the time of the surgical repair.

Media

PediHeart Podcast

Dr. DeWitt shares her insights into a recent report she co-authored by the Departments of Surgery and Cardiology at her institution about intraoperative mapping of conduction

Publications

  1. A Quality Improvement Initiative to Optimize Follow-Up in the New England Area for Pediatric Patients With Cardiovascular Implantable Electronic Devices. J Cardiovasc Electrophysiol. 2025 Apr; 36(4):842-847. View Abstract

  2. Intraoperative Conduction Mapping to Reduce Postoperative Atrioventricular Block in Complex Congenital Heart Disease. J Am Coll Cardiol. 2024 Nov 19; 84(21):2102-2112. View Abstract

  3. Ventricular septation for double inlet ventricle: Avoiding conduction injury. J Thorac Cardiovasc Surg. 2025 Apr; 169(4):1055-1065. View Abstract

  4. Efficacy and safety of early postoperative ablation in patients with congenital heart disease. Heart Rhythm. 2025 May; 22(5):1330-1336. View Abstract

  5. Implantable cardioverter defibrillators in paediatric patients: yet another example of healthcare divergence? Europace. 2024 Aug 30; 26(9). View Abstract

  6. Impact of permanent pacemaker for iatrogenic atrioventricular block on outcomes after congenital heart surgery. J Thorac Cardiovasc Surg. 2025 Feb; 169(2):411-419.e5. View Abstract

  7. Intraoperative conduction system mapping during reoperative mitral valve replacement. JTCVS Tech. 2024 Oct; 27:138-141. View Abstract

  8. Comparative utility of omnipolar and bipolar electroanatomic mapping methods to detect and localize dual nodal substrate in patients with atrioventricular nodal reentrant tachycardia. J Interv Card Electrophysiol. 2024 Oct; 67(7):1579-1591. View Abstract

  9. Premature ventricular contractions in children and young adults: natural history and clinical implications. Europace. 2024 Mar 01; 26(3). View Abstract

  10. Analysis of Perioperative and Long-Term Outcomes Among Presentations of Anomalous Left Coronary Artery from the Pulmonary Artery Diagnosed Beyond Infancy Versus During Infancy. Pediatr Cardiol. 2025 Jan; 46(1):139-147. View Abstract

  11. Hypertrophic Cardiomyopathy and Ventricular Preexcitation in the Young: Cause and Accessory Pathway Characteristics. Circ Arrhythm Electrophysiol. 2023 11; 16(11):e012191. View Abstract

  12. Medical cardioversion of atrial fibrillation and flutter with class IC antiarrhythmic drugs in young patients with and without congenital heart disease. J Cardiovasc Electrophysiol. 2023 12; 34(12):2545-2551. View Abstract

  13. Retroflexed catheter course reduces the risk of right free wall accessory pathway recurrence. J Cardiovasc Electrophysiol. 2023 09; 34(9):1828-1834. View Abstract

  14. Unequal Representation in Pediatric Cardiology: The More Things Change, The More They Stay the Same? J Am Coll Cardiol. 2023 03 28; 81(12):1189-1191. View Abstract

  15. Sudden Cardiac Death in Adolescents: Allowing the Dead to Speak. J Am Coll Cardiol. 2023 03 21; 81(11):1018-1020. View Abstract

  16. Conduction mapping during complex congenital heart surgery: Creating a predictive model of conduction anatomy. J Thorac Cardiovasc Surg. 2023 05; 165(5):1618-1628. View Abstract

  17. Arrhythmias in Repaired Tetralogy of Fallot: A Scientific Statement From the American Heart Association. Circ Arrhythm Electrophysiol. 2022 11; 15(11):e000084. View Abstract

  18. Radiofrequency Catheter Ablation for Pediatric Atrioventricular Nodal Reentrant Tachycardia: Impact of Age on Procedural Methods and Durable Success. J Am Heart Assoc. 2022 06 21; 11(12):e022799. View Abstract

  19. Intraoperative conduction mapping in complex congenital heart surgery. JTCVS Tech. 2022 Apr; 12:159-163. View Abstract

  20. Relation of Norwood Shunt Type and Frequency of Arrhythmias at 6 Years (from the Single Ventricle Reconstruction Trial). Am J Cardiol. 2022 04 15; 169:107-112. View Abstract

  21. Tachyarrhythmias arising from the conduction system in pediatric patients with complete heart block. HeartRhythm Case Rep. 2022 Jan; 8(1):22-26. View Abstract

  22. Pacemaker use for the treatment of reflex-mediated syncope: 40-year experience at a single paediatric institution. Cardiol Young. 2021 Oct 28; 1-6. View Abstract

  23. Multicenter Outcomes of Catheter Ablation for Atrioventricular Reciprocating Tachycardia Mediated by Twin Atrioventricular Nodes. JACC Clin Electrophysiol. 2022 03; 8(3):322-330. View Abstract

  24. Parent-Reported Symptoms and Perceived Effectiveness of Treatment in Children Hospitalized with Advanced Heart Disease. J Pediatr. 2021 Nov; 238:221-227.e1. View Abstract

  25. Atrial pacing in Fontan patients: The effect of transvenous lead on clot burden. Heart Rhythm. 2021 11; 18(11):1860-1867. View Abstract

  26. Accessory pathway ablation in Ebstein anomaly: A challenging substrate. Heart Rhythm. 2021 11; 18(11):1844-1851. View Abstract

  27. Lead age as a predictor for failure in pediatrics and congenital heart disease. Pacing Clin Electrophysiol. 2021 04; 44(4):586-594. View Abstract

  28. Risk Factors for Early Recurrence Following Ablation for Accessory Pathways: The Role of Consolidation Lesions. Circ Arrhythm Electrophysiol. 2020 11; 13(11):e008848. View Abstract

  29. Value of provocative electrophysiology testing in the management of pediatric patients after congenital heart surgery. Pacing Clin Electrophysiol. 2020 09; 43(9):901-907. View Abstract

  30. Clinical and Genetic Findings in Children Presenting With Ventricular Fibrillation as the First Manifestation of Cardiovascular Disease. J Am Heart Assoc. 2020 05 18; 9(10):e016322. View Abstract

  31. Prevalence and Prognostic Association of a Clinical Diagnosis of Depression in Adult Congenital Heart Disease: Results of the Boston Adult Congenital Heart Disease Biobank. J Am Heart Assoc. 2020 05 05; 9(9):e014820. View Abstract

  32. Adverse event rate during inpatient sotalol initiation for the management of supraventricular and ventricular tachycardia in the pediatric and young adult population. Heart Rhythm. 2020 06; 17(6):984-990. View Abstract

  33. Ultra-rapid atrial pacing as a form of rate control in postoperative automatic arrhythmias in patients with congenital heart disease. HeartRhythm Case Rep. 2020 Apr; 6(4):215-218. View Abstract

  34. Implanted pacemaker and cardioverter-defibrillator in a patient with ectopia cordis. HeartRhythm Case Rep. 2020 Feb; 6(2):110-113. View Abstract

  35. Phenotypic Manifestations of Arrhythmogenic Cardiomyopathy in Children and Adolescents. J Am Coll Cardiol. 2019 07 23; 74(3):346-358. View Abstract

  36. Differentiation of fasciculoventricular fibers from anteroseptal accessory pathways using the surface electrocardiogram. Heart Rhythm. 2019 07; 16(7):1072-1079. View Abstract

  37. Intravenous Amiodarone and Sotalol Impair Contractility and Cardiac Output, but Procainamide Does Not: A Langendorff Study. J Cardiovasc Pharmacol Ther. 2019 05; 24(3):288-297. View Abstract

  38. Coronary artery compression from epicardial leads: More common than we think. Heart Rhythm. 2018 10; 15(10):1439-1447. View Abstract

  39. Trans-Fontan baffle placement of an endocardial systemic ventricular pacing lead. HeartRhythm Case Rep. 2017 Feb; 3(2):129-132. View Abstract

  40. A Pediatric Cardiology Fellowship Boot Camp improves trainee confidence. Cardiol Young. 2016 Dec; 26(8):1514-1521. View Abstract

  41. Rodent Working Heart Model for the Study of Myocardial Performance and Oxygen Consumption. J Vis Exp. 2016 08 16; (114). View Abstract

  42. Effects of commonly used inotropes on myocardial function and oxygen consumption under constant ventricular loading conditions. J Appl Physiol (1985). 2016 07 01; 121(1):7-14. View Abstract

  43. Time dependence of risks and benefits in pediatric primary prevention implantable cardioverter-defibrillator therapy. Circ Arrhythm Electrophysiol. 2014 Dec; 7(6):1057-63. View Abstract

  44. Implantable cardioverter-defibrillators in children. Arch Dis Child. 2015 Mar; 100(3):265-70. View Abstract

  45. Successful cryoablation of atrioventricular nodal reentrant tachycardia in a child with hemophilia A. J Pediatr Hematol Oncol. 2010 Jul; 32(5):404-6. View Abstract

Being told your child has a heart problem, no matter how simple or complex, is overwhelming information for a parent to hear. One of my most important roles as a physician caring for patients with heart disease is to educate patients and their families about their condition. Applying my education and training to help relieve a family’s anxiety in this manner is one of the most fulfilling aspects of my job.

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