Samuel Lewis Johnston MD

Cardiac Electrophysiology

Clinical Associate Professor

UIHC Heart & Vascular Center200 Hawkins Drive, 4212 RCPIowa City, IA 52242
Phone+1 319-356-3689
Fax+1 319-353-6343

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Summary

Dr. Samuel Johnston is a Cardiac Electrophysiologist based in Iowa City, IA, specializing in atrial fibrillation, ventricular tachycardia, and catheter arrhythmia ablation. He completed his medical education and training at Loyola University, including fellowships in Cardiovascular Disease and Clinical Cardiac Electrophysiology. He currently practices at University of Iowa Hospitals & Clinics and the Iowa City VA Health System. Dr. Johnston has participated in clinical trials related to atrial fibrillation and cardiomyopathy and has published several articles on the use of artificial intelligence in syncope management. He has also received CMS Meaningful Use Stage 1 Certifications from Epic Systems Corporation.

Education & Training

Loyola University Medical CenterFellowship, Clinical Cardiac Electrophysiology, 2008 - 2010
Loyola University Medical CenterFellowship, Cardiovascular Disease, 2005 - 2008
Loyola University Medical CenterResidency, Internal Medicine, 2002 - 2005
Loyola University Chicago Stritch School of MedicineClass of 2002

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Certifications & Licensure

IL State Medical License 2005 - 2029
IA State Medical License 2014 - 2028
OR State Medical License 2011 - 2025
WA State Medical License 2010 - 2013
American Board of Internal Medicine Cardiovascular Disease
American Board of Internal Medicine Clinical Cardiac Electrophysiology

Awards, Honors, & Recognition

CMS Meaningful Use Stage 1 Certification EpicCare Ambulatory - Core EMR, Epic Systems Corporation, 2012, 2014
CMS Meaningful Use Stage 1 Certification EpicCare Ambulatory EMR, Epic Systems Corporation, 2012-2013

Clinical Trials

The Rhythm Evaluation for AntiCoagulaTion With Continuous Monitoring of Atrial Fibrillation Start of enrollment: 2023 Jul 13
RECRUITING
PHASE3
Analysis of Both Sex and Device Specific Factors on Outcomes in Patients with Non-Ischemic Cardiomyopathy Start of enrollment: 2019 May 09
COMPLETED

Publications & Presentations

PubMed

2 citations
The hope and the hype of artificial intelligence for syncope management.
Samuel L Johnston, E John Barsotti, Constantinos Bakogiannis, Artur Fedorowski, Fabrizio Ricci
European Heart Journal. Digital Health. 2025-09-01
To Open and Close: A Combined Case of Left Atrial Appendage Occlusion and Pulmonary Vein Stenting.
Charles Dylan Miks, Ashraf Alzahrani, Nicholas Isom, Tyler Rasmussen, Samuel L Johnston
Journal of the Society for Cardiovascular Angiography & Interventions. 2025-05-01
7 citations
Will Artificial Intelligence Be "Better" Than Humans in the Management of Syncope?
Franca Dipaola, Milena A Gebska, Mauro Gatti, Alessandro Giaj Levra, William H Parker
JACC. Advances. 2024-09-01