Jason Garnreiter

Dr. Jason Garnreiter graduated from Washington University in St. Louis with a degree in physics before attending medical school at Case Western Reserve University. He stayed in Cleveland for his paediatric residency at Rainbow Babies and Children's Hospital before completing fellowships in cardiology and electrophysiology at Primary Children's Medical Center in Salt Lake City, Utah. He joined the faculty at St. Louis University School of Medicine and Cardinal Glennon Children’s Hospital where he was the Director of pediatric electrophysiology for 8 years. He moved to Denver and worked at Rocky Mountain Hospital for Children for 4 years before joining the electrophysiology team at SickKids in October of 2025.

Education and Experience

• 2025 - Present: Staff Cardiologist, Hospital for Sick Children, Toronto, Ontario, Canada 
• 2021 - 2025: Pediatric Electrophysiologist, Rocky Moutain Hospital for Children, Denver, CO, USA
• 2013 - 2021: Director, Pediatric Electrophysiology, Cardinal Glennon Children's Hospital, St. Louis, MO, USA
• 2009 - 2013: Fellowship, Pediatric Cardiology and Electrophysiology, Primary Children's Medical Center, Salt Lake City, UT, USA
• 2006 - 2009: Residency, Pediatrics, Rainbow Babies and Children's Hospital, Cleveland, OH, USA
• 2002 - 2006: MD, Case Western Reserve University, Cleveland, OH, USA
• 1998 - 2002: BA, Washington University in St. Louis, MO, USA

1. Principal Author. Garnreiter J, Whitaker P, Pilcher T, Etheridge S, Saarel E. Lumenless pacing leads: performance and extraction in pediatrics and congenital heart disease. Pacing Clin Electrophysiol. 2015 Jan;38(1):42-7. doi: 10.1111/pace.12508. Epub 2014 Sep 16. PMID: 25224253. 
2. Principal Author. Garnreiter J, Pilcher TA, Etheridge SP, Saarel EV. Inappropriate ICD shocks in pediatrics and congenital heart disease patients: Risk factors and programming strategies. Heart Rhythm. 2015 May;12(5):937-42. doi: 10.1016/j.hrthm.2015.01.028. Epub 2015 Jan 22. PMID: 25620047. 
3. Co-Author. Robinson JA, LaPage MJ, Atallah J, Webster G, Miyake CY, Ratnasamy C, Ollberding NJ, Mohan S, Von Bergen NH, Johnsrude CL, Garnreiter J, Spar DS, Czosek RJ. Outcomes of Pediatric Patients With Defibrillators Following Initial Presentation With Sudden Cardiac Arrest. Circ Arrhythm Electrophysiol. 2021 Feb;14(2):e008517. doi: 10.1161/CIRCEP.120.008517. Epub 2021 Jan 5. PMID: 33401923; PMCID: PMC7887076. 
4. Co-Author. Von Alvensleben JC, Dechert B, Bradley DJ, Fish FA, Moore JP, Pilcher TA, Escudero C, Ceresnak SR, Kwok SY, Balaji S, Aziz PF, Papagiannis J, Cortez D, Garnreiter J, Kean A, Schäfer M, Collins KK. Subcutaneous Implantable Cardioverter-Defibrillators in Pediatrics and Congenital Heart Disease: A Pediatric and Congenital Electrophysiology Society Multicenter Review. JACC Clin Electrophysiol. 2020 Dec;6(14):1752-1761. doi: 10.1016/j.jacep.2020.07.010. Epub 2020 Oct 28. PMID: 33357571. 
5. Co-Author. Baskar S, LaPage MJ, Ollberding NJ, Spar DS, Dechert BE, Dionne A, Ochoa L, Law I, Karpawich PP, Torpoco-Rivera D, Follansbee CW, Garnreiter J, Czosek RJ. Safety of Ablation Within the Coronary Venous Sinus in Pediatric Patients. J Cardiovasc Electrophysiol. 2025 Apr;36(4):848-854. doi: 10.1111/jce.16607. Epub 2025 Feb 14. PMID: 39950561.