• Adjunct Associate Professor, Biomedical Engineering
  • Adjunct Associate Professor, Internal Medicine
  • Associate Professor, Surgery
  • Associate Professor, Surgery


  • Structural and Electrical Remodeling in Chronic Atrial Fibrillation: Lessons from Animal Models. Shanghai Heart Rhythm Conference 2015, Shanghai, China. Invited Talk/Keynote, Presented, 10/2015.
  • Chronic large animal models of atrial fibrillation: experience with dogs, goats, and pigs. Comparative Medicine Center, University of Utah. Invited Talk/Keynote, Presented, 11/2013.
  • Chronic Large Animal Models of Atrial Fibrillation : Experience with Dogs, Goats, and Pigs. 2012 Shanghai Cardiac Arrhythmia Symposium, Ruijin Hospital, Shanghai, China. Presentation, Presented, 09/16/2012.
  • Noninvasive delayed enhancement MRI to evaluate fibrosis development in AF. 2011 Shanghai Cardiac Arrhythmia Conference, China. Invited Talk/Keynote, Presented, 09/18/2011.
  • The Role of the Purkinje System in Ventricular Fibrillation. 2010 Shanghai Cardiac Arrhythmia Symposium. Invited Talk/Keynote, Presented, 09/19/2010.

Grants, Contracts & Research Gifts

  • Quantification of Structural and Electrical Remodeling in Chronic Atrial Fibrillation. PI: Dosdall, Derek J. University of Utah Office of the VP for Research, Seed Grant, 01/01/2016 - 12/31/2016. Total project budget to date: $0.00


  • English, fluent.


  • Yamashita K, Kholmovski E, Ghafoori E, Kamali R, Kwan E, Lichter J, MacLeod R, Dosdall DJ & Ranjan R (2020). Characterization of edema after cryo and radiofrequency ablations based on serial magnetic resonance imaging. Journal of cardiovascular electrophysiology. Vol. 30, 255-262. Published, 02/01/2020.
  • Yamashita K, Kwan E, Kamali R, Ghafoori E, Steinberg BA, MacLeod RS, Dosdall DJ & Ranjan R (2020). Blanking period after radiofrequency ablation for atrial fibrillation guided by ablation lesion maturation based on serial MR imaging. Journal of cardiovascular electrophysiology. Vol. 31, 450-456. Published, 02/01/2020.
  • Yamashita K, Silvernagel J, Kwan E, Kamali R, Ghafoori E, MacLeod R, Dosdall DJ & Ranjan R (2019). Changes in atrial electrophysiological and structural substrate and their relationship to histology in a long-term chronic canine atrial fibrillation model. Pacing and clinical electrophysiology : PACE. Vol. 42, 930-936. Published, 12/01/2019.
  • Thomas S, Silvernagel J, Angel N, Kholmovski E, Ghafoori E, Hu N, Ashton J, Dosdall DJ, MacLeod R & Ranjan R (2019). Higher contact force during radiofrequency ablation leads to a much larger increase in edema as compared to chronic lesion size. (pp. 1143-1149). Vol. 29. Journal of cardiovascular electrophysiology. Published, 11/01/2019.
  • Kholmovski EG, Silvernagel J, Angel N, Vijayakumar S, Thomas S, Dosdall D, MacLeod R, Marrouche NF & Ranjan R (2019). Acute noncontrast T1-weighted magnetic resonance imaging predicts chronic radiofrequency ablation lesions. Journal of cardiovascular electrophysiology. Vol. 29, 1556-1562. Published, 11/01/2019.
  • Ghafoori E, Angel N, Dosdall DJ, MacLeod RS & Ranjan R (2019). Atrial fibrillation observed on surface ECG can be atrial flutter or atrial tachycardia. Journal of electrocardiology. Vol. 51, S67-S71. Published, 10/01/2019.
  • Reno CM, Bayles J, Huang Y, Oxspring M, Hirahara AM, Dosdall DJ & Fisher SJ (2019). Severe Hypoglycemia-Induced Fatal Cardiac Arrhythmias Are Mediated by the Parasympathetic Nervous System in Rats. Diabetes. Vol. 68, 2107-2119. Published, 10/01/2019.
  • Yamashita K, Hu N, Ranjan R, Selzman CH & Dosdall DJ (2019). Clinical Risk Factors for Postoperative Atrial Fibrillation among Patients after Cardiac Surgery. The Thoracic and cardiovascular surgeon. Vol. 67, 107-116. Published, 04/01/2019.
  • Yamashita K, Quang C, Schroeder JD, DiBella E, Han F, MacLeod R, Dosdall DJ & Ranjan R (2018). Distance between the left atrium and the vertebral body is predictive of esophageal movement in serial MR imaging. Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing. Vol. 52, 149-156. Published, 12/01/2018.
  • Jin Q, Wu L, Dosdall DJ, Li L, Rogers JM, Ideker RE & Huang J (2018). Effects of combination of sotalol and verapamil on initiation, maintenance, and termination of ventricular fibrillation in swine hearts. Cardiovascular therapeutics. Vol. 36, e12326. Published, 09/01/2018.
  • Panitchob N, Li L, Huang J, Ranjan R, Ideker RE & Dosdall DJ (2017). Endocardial Activation Drives Activation Patterns During Long-Duration Ventricular Fibrillation and Defibrillation. Circulation. Arrhythmia and electrophysiology. Vol. 10. Published, 12/01/2017.
  • Ghafoori E, Kholmovski EG, Thomas S, Silvernagel J, Angel N, Hu N, Dosdall DJ, MacLeod R & Ranjan R (2017). Characterization of Gadolinium Contrast Enhancement of Radiofrequency Ablation Lesions in Predicting Edema and Chronic Lesion Size. Circulation. Arrhythmia and electrophysiology. Vol. 10. Published, 11/01/2017.
  • Polejaeva IA, Ranjan R, Davies CJ, Regouski M, Hall J, Olsen AL, Meng Q, Rutigliano HM, Dosdall DJ, Angel NA, Sachse FB, Seidel T, Thomas AJ, Stott R, Panter KE, Lee PM, Van Wettere AJ, Stevens JR, Wang Z, MacLeod RS, Marrouche NF & White KL (2017). Increased Susceptibility to Atrial Fibrillation Secondary to Atrial Fibrosis in Transgenic Goats Expressing Transforming Growth Factor-β1. Journal of cardiovascular electrophysiology. Vol. 27, 1220-1229. Published, 11/01/2017.
  • Angel N, Li L, MacLeod RS, Marrouche N, Ranjan R, Dosdall DJ (2015). Diverse fibrosis architecture and premature stimulation facilitate initiation of reentrant activity following chronic atrial fibrillation. J Cardiovasc Elect. 26(12):1352-1360. Published, 12/2015.
  • Koopmann M, Hong K, Kholmovski EG, Huang EC, Hu N, Ying J, Levenson R, Vijayakumar S, Dosdall DJ, Ranjan R & Kim D (2015). Post-contrast myocardial T(1) and ECV disagree in a longitudinal canine study. NMR in biomedicine. Vol. 27, 988-95. Published, 03/01/2015.
  • Dosdall DJ. (2009). Mapping ventricular fibrillation: a simplified experimental model leads to a complicated result. Heart Rhythm. Vol. 6, 693-5. Published, 05/01/2009.
  • Ideker RE, Dosdall DJ, Robertson PG, Rogers JM. (2007). Ventricular fibrillation: discordant alternans and discordant results. Heart Rhythm. Vol. 4, 1069-71. Published, 08/01/2007.