Education and Training
MD - Yale University School of Medicine, New Haven, CT
Pediatrics - Boston Children’s Hospital and Boston Medical Center, Boston, MA
Pediatrics - Boston Children’s Hospital and Boston Medical Center, Boston, MA
Pediatric Cardiology - Children’s Hospital of Philadelphia, Philadelphia, PA
Pediatric Electrophysiology - Children’s Hospital of Philadelphia, Philadelphia, PA
Titles and Academic Titles
Assistant Professor of Pediatric, Perelman School of Medicine at the University of Pennsylvania
Departments and Services
Dustin Nash, Hae-Rhi Lee, Christopher Janson, Chalese Richardson-Olivier, Maully J Shah: Video game ventricular tachycardia: The "Fortnite" phenomenon. Heart Rhythm Case Reports May 2020.
Escudero CA, Ceresnak SR, Collins KK, Pass RH, Aziz PF, Blaufox AD, Ortega MC, Cannon BC, Cohen M, Dechert BE, Dubin AM, Motonaga KS, Epstein MR, Erickson CC, Fishberger SB, Gates GJ, Capone CA, Nappo L, Kertesz NJ, Kim JJ, Valdes SO, KubuÅ¡ P, Law IH, Maldonado J, Moore JP, Perry JC, Sanatani S, Seslar SP, Shetty I, Zimmerman FJ, Skinner JR, Marcondes L, Stephenson EA, Asakai H, Tanel RE, Uzun O, Etheridge SP, Janson CM.: Loss of ventricular preexcitation during noninvasive testing does not exclude high-risk accessory pathways: A multicenter study of WPW in children. Heart Rhythm June 2020.
CM Janson, HH Nam, C Herz, A Lasso, A Cianciulli, and MA Jolley: Successful Integration of a Three-Dimensional Transthoracic Echocardiography-Derived Model with an Electroanatomic Mapping System to Guide Catheter Ablation of WPW. Journal of Cardiovascular Electrophysiology August 2020.
Janson CM, Ceresnak SR, Choi JM, Dubin AM, Motonaga KS, Mann GE, Kahana M, Fitz-James I, Wise-Faberowski L, Kamra K, Nappo L, Trela A, Pass RH: A Prospective Assessment of Optimal Mechanical Ventilation Parameters for Pediatric Catheter Ablation. Pediatric Cardiology 40(1): 126-132, Jan 2019.
Clark BC, Janson CM, Nappo L, Pass RH: Ultrasound-guided axillary venous access for pediatric and adult congenital lead implantation. Pacing and Clinical Electrophysiology 42(2): 166-170, Feb 2019.
Gartenberg AJ, Pass RH, Ceresnak S, Nappo L, and Janson CM: Incidence of Echocardiographic Abnormalities Following Pediatric SVT Ablation: Comparison of Cases Utilizing Fluoroscopy Alone to Cases with Adjunctive 3D Electroanatomic Mapping. Pediatric Cardiology 40(3): 497-503, Mar 2019.
Balaji S, DiLorenzo MP, Fish FA, Etheridge SP, Aziz PF, Russell MW, Tisma S, Pflaumer A, Sreeram N, Kubus P, Law IH, Kantoch MJ, Kertesz NJ, Strieper M, Erickson CC, Moore JP, Nakano SJ, Singh HR, Chang P, Cohen M, Fournier A, Ilina MV, Smith RT, Zimmerman F, Horndasch M, Li W, Batra A, Liberman L, Hamilton R, Janson CM, Sanatani S, Zeltser I, McDaniel G, Blaufox AD, Garnreiter JM, Katcoff H, Shah M: Risk Factors for Lethal Arrhythmic Events in Children and Adolescents with Hypertrophic Cardiomyopathy and an Implantable Defibrillator: An International Multi-Center Study. Heart Rhythm S1547-5271(19): 30369-8, Apr 2019.
Ceresnak SR, Pass RH, Dubin AM, Yang L, Motonaga KS, Hedlin H, Avasarala K, Trela A, McElhinney DB, Janson C, Nappo L, Ling XB, Gates GJ: Validation of a novel automated signal analysis tool for ablation of Wolff-Parkinson-White Syndrome. PLoS One 14(6): e0217282, Jun 2019.
Janson CM, Tan RB, Iyer VR, Vogel RL, Vetter VL, and Shah MJ. : Ivabradine for Treatment of Tachyarrhythmias in Children and Young Adults: A Case Series. Heart Rhythm Case Reports 5(6): 333-337, Jun 2019.
Balaji S, DiLorenzo MP, Fish FA, Etheridge SP, Aziz PF, Russell MW, Tisma S, Pflaumer A, Sreeram N, Kubus P, Law IH, Kantoch MJ, Kertesz NJ, Strieper M, Erickson CC, Moore JP, Nakano SJ, Singh HR, Chang P, Cohen M, Fournier A, Ilina MV, Smith RT, Zimmerman F, Horndasch M, Li W, Batra A, Liberman L, Hamilton R, Janson CM, Sanatani S, Zeltser I, McDaniel G, Blaufox AD, Garnreiter JM, Katcoff H, Shah M: Impact of Obesity on Left Ventricular Thickness in Children with Hypertrophic Cardiomyopathy. Pediatric Cardiology 40(6): 1253-1257, Aug 2019.
Rochelson E, Clark BC, Janson CM, Ceresnak SR, Nappo L, Pass RH: "If at first you don't succeed": repeat ablations in young patients with supraventricular tachycardia. J Interv Card Electrophysiol December 2019.
Josephs K, Patel K, Janson CM, Montagna C, McDonald TV.: Compound heterozygous CASQ2 mutations and long-term course of catecholaminergic polymorphic ventricular tachycardia. Molecular Genetics and Genomic Medicine 5(6): 788 - 794, Nov 2017.
CM Janson, V Bhupathiraju, S Talathi, and K Glotzbach: Multiple Accessory Pathways in an Infant With Cardiac Rhabdomyomas and Tuberous Sclerosis. JACC: Clinical Electrophysiology 4(4): 553-554, Apr 2018.
Pass RH, Liberman L, Silver ES, Janson CM, Blaufox AD, Nappo L, Ceresnak SR.: The "hidden" concealed left-sided accessory pathway: An uncommon cause of SVT in young people. Pacing and Clinical Electrophysiology 41(4): 368-371, Apr 2018.
Clark BC, Janson CM, Ceresnak SR, Osei FA, Bonney WJ, Nappo L, Pass RH: Assessment of a novel radiation reduction protocol for pediatric and adult congenital device implantation. Journal of Interventional Cardiac Electrophysiology 1(55): 93-98, Nov 2018.
Nguyen MB, Ceresnak SR, Janson CM, Fishberger SB, Love BA, Blaufox AD, Motonaga KS, Dubin AM, Nappo L, and RH Pass. “A Multicenter Review of Ablation in the Aortic Cusps in Young People.” Pacing and Clinical Electrophysiology, 2017; 40(7): 798-802.
Ceresnak SR, Nappo L, Janson CM, and RH Pass. “Tricking CARTO: Cryoablation of Supraventricular Tachycardia in Children with Minimal Radiation Exposure Using the CARTO3 System.” Pacing and Clinical Electrophysiology, 2016; 39(1): 36-41.
Janson CM, Ceresnak SR, Chung WK, and RH Pass. “Catecholaminergic Polymorphic Ventricular Tachycardia in a Child with Brugada Pattern on ECG: One Patient with Two Diseases?” Heart Rhythm, 2014; 11(11): 2101-2104.
Janson CM, Poelzing S, and MJ Shah. “Combined Inhibition of Na+ and Ca2+ Channels: A Novel Paradigm for Treatment of Incessant Ventricular Arrhythmias in Andersen-Tawil Syndrome.” Heart Rhythm, 2014; 11(2):318-320.
Janson CM, Patel A, Bonney W, Smoots K, and MJ Shah. “Implantable Cardioverter-Defibrillator Lead Failure in Children and Young Adults: A Matter of Lead Diameter or Lead Design?” Journal of the American College of Cardiology, 2014; 63(2):133-140.
Janson, CM et al. “Predictors of Marriage and Divorce in Adult Survivors of Childhood Cancers: A Report from the Childhood Cancer Survivor Study.” Cancer Epidemiology, Biomarkers, and Prevention, 2009; 18(10): 2626-35.
Chris Janson, Maully Shah, Kevin Kennedy, Ramesh Iyer, Shashank Behere, Tammy Sweeten, Michael O'Byrne: Association Of Weight With Ablation Outcomes In Pediatric Wolff-Parkinson-White Syndrome: Analysis Of The NCDR® IMPACT Registry. AHA Scientific Sessions 2020 November 2020.
Dustin Nash MD, Hannah Katcoff MPH, Jennifer Faerber PhD, V. Ramesh Iyer MD, Maully J. Shah MBBS, Michael L. O'Byrne MD, MSCE, Christopher Janson, MD: Impact of Device Miniaturization on Implantable Loop Recorder Utilization in the Pediatric Population: An Analysis of the MarketScan Database AHA Scientific Sessions 2020 November 2020.
Shankar Baskar, MD; Maully J. Shah, MBBS, FHRS; David S. Spar, MD; Shashank P. Behere, MD; Kevin F Kennedy, MS; Christopher M. Janson, MD; Richard J. Czosek, MD: RF vs Cryo: Effect of Ablation Energy Source on Outcomes of Pediatric AVNRT Ablation - Insight From the NCDR® Impact Registry. AHA Scientific Sessions 2020 November 2020.
S Aydin, N Siddiqi, CM Janson, S Norris, G Peek, K Beddows, J Lamour, and D Hsu: Pediatric Heart Failure and Pediatric Cardiomyopathies. Ungerleider: Critical Heart Disease in Infants and Children, 3e. Elsevier, 2019.
Posters and Presentations
Cain N, Saul JP, Gongwer R, Bulic A, Czosek R, DeWitt E, Hill A, Janson CM, Kaltman J, Kim J, Landstrom A, LaPage M, Niu M, Silver E, Singh A, Thacker D, Trachtenberg F, Whitehill R, Newburger J. : Is Norwood Shunt Type Predictive of Ventricular Arrhythmias? Abstract Rapid Fire Oral, American Heart Association 2019 Scientific Sessions 2019.
Escudero CA, Ceresnak SR, Collins KK, Pass RH, Aziz PF, Blaufox AD, Ortega MC, Cannon BC, Cohen M, Dechert BE, Dubin AM, Motonaga KS, Epstein MR, Erickson CC, Fishberger SB, Gates GJ, Capone CA, Nappo L, Kertesz NJ, Kim JJ, Valdes SO, KubuÅ¡ P, Law IH, Maldonado J, Moore JP, Perry JC, Sanatani S, Seslar SP, Shetty I, Zimmerman FJ, Skinner JR, Marcondes L, Stephenson EA, Asakai H, Tanel RE, Uzun O, Etheridge SP, Janson CM: The Effect of Isoproterenol Use on Accessory Pathway Conduction Characteristics in Wolff-Parkinson-White Syndrome in Children. Abstract Rapid Fire Oral, American Heart Association 2019 Scientific Sessions 2019.
Hammond B, El Assaad I, Kost L, Janson CM, Stephenson E, Shetty I, Johnsrude C, Fish F, Webster G, and Aziz P.: Lone? Atrial Fibrillation: A Multi-institutional Retrospective PACES Collaborative Study. Podium, Heart Rhythm Society Scientific Sessions, San Francisco, CA 2019.
Janson CM, Shah MJ, Iyer VR, Kennedy KF, Sweeten TL, Glatz AC, and O'Byrne ML: Comparison of Outcomes of Pediatric Catheter Ablation Under General Anesthesia Versus Sedation. A Report from the NCDR IMPACT Registry. Podium (Moderated poster presentation), Heart Rhythm Society Scientific Sessions, San Francisco, CA 2019.
Janson CM. "Innovations in imaging for mapping and ablation of WPW", Cardiology 2021 - 24th Annual Update on Pediatric and Congenital Cardiovascular Disease Virtual Conference. Feb 2021.
Janson CM. "Assessment and Treatment of Arrhythmias", CHOP OMInar in Pediatric Cardiology Virtual Conference. Jan 2021.
Janson CM. "I Refer for Left Sympathetic Cardiac Denervation Anyone Whose QTc is > 570 msec"; Debate, Con Position; Heart Rhythm Society 2020 Scientific Sessions (invited lecture; event cancelled). May 2020.
Janson CM. "ECG Basics", Cardiology 2020 - 23rd Annual Update on Pediatric and Congenital Cardiovascular Disease Conference, Orlando, FL. Feb 2020.
Janson CM. "Temporary Pacing - Who and How?", Cardiology 2020 - 23rd Annual Update on Pediatric and Congenital Cardiovascular Disease Conference, Orlando, FL. Feb 2020.
Janson CM. "The Brugada ECG Pattern: What Is It?_What Should We Do About It?", Cardiology 2020 - 23rd Annual Update on Pediatric and Congenital Cardiovascular Disease Conference, Orlando, FL. Feb 2020.
Janson CM. Comparison of Outcomes of Pediatric Catheter Ablation Under General Anesthesia Versus Sedation. A Report from the NCDR IMPACT Registry, Heart Rhythm Society Scientific Sessions, Moderated Poster Presentation. May 2019.
Awards and Honors
2008, Von L Myer Travel Grant recipient
2007, Yale University Graduate/Professional Ivy Award, co-recipient on behalf of Haven Free Clinic
2007, Alpha Omega Alpha, Yale University School of Medicine
2007, Cum laude, Yale University School of Medicine
2002, Magna cum laude, Department of Molecular Biology, Princeton University
1998, United States Presidential Scholar
Editorial and Academic Positions
2020-present, Reviewer, JACC EP
2019-present, Reviewer, Heart Rhythm
2019-present, Reviewer, Heart Rhythm Case Reports
2014-present, Reviewer, Pacing and Clinical Electrophysiology
2014-present, Reviewer, Circulation: Arrhythmia and Electrophysiology
2014-present, Reviewer, Journal of Pediatrics
2014-present, Reviewer, Pediatric Cardiology
2014-present, Reviewer, Cardiology in the Young
Academic and Institutional Committees
2019-present, Divisional Super-User and Member, Cardiac Center, Epic Optimization Team
2019-present, Cardiac Center Information Systems Committee
2018-present, Cardiology Fellowship Selection Committee
2017-present, Cardiology Fellowship Clinical Competency Committee
Leadership and Memberships
Memberships in Professional Organizations
2014-present, Pediatric and Congenital Electrophysiology Society (PACES)
- 2017-present, Research Committee
2017-present, Emerging Leaders Committee
2012-present, Heart Rhythm Society
2019-present, American College of Cardiology
2016-present, American Heart Association
- 2016-present, - Council on Cardiovascular Disease in the Young
Patient Experience Ratings
About the Patient Experience Rating System
The Patient Experience Rating is an average of all responses to the care provider related questions shown above from our nationally-recognized Press Ganey Patient Satisfaction Survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.
Responses are measured on a scale of 1 to 5 with 5 being the best score.
We are committed to true transparency. However, to ensure the comments are fair and correctly attributed, we review each one before posting to the website. We exclude entire comments that disclose patient's protected health information, are off-topic, or include other confidential or inappropriate content. Comments will appear on provider bios only if providers have a minimum number of comments.
Comments are shared internally for education purposes to ensure that we are doing our very best for the patients and families for whom we are privileged to care.
The comments are submitted by patients and families and reflect their views and opinions. The comments are not endorsed by and do not reflect the views of Children’s Hospital of Philadelphia.