Joshua Hermsen, MD

Assistant Professor

  • Section of Pediatric Cardiothoracic Surgery
  • Division of Cardiothoracic Surgery
(608) 262-3858


  • MD, Medical University of South Carolina, 2004
  • General Surgery Residency, University of Wisconsin Madison, Madison, WI
  • Cardiothoracic Surgery Fellowship, University of Washington Medical Center, Seattle, WA
  • Congenital Cardiac Surgery Fellowship, Seattle Children’s Hospital, Seattle, WA

Clinical Specialties

Dr. Hermsen specializes in the care of patients of all ages with congenital heart disease ranging from repairs in the neonatal period to multiple re-do operations and transplants in adult patients of all ages. He also has interest and expertise in treating patients with hypertrophic cardiomyopathy complicated by obstruction of the left ventricular outflow tract, mitral valve problems and heart rhythm problems. He also has extensive experience in treating patients with congenital and acquired heart disease complicated by infectious endocarditis.

Research Interests

Dr. Hermsen’s research interests focus on demonstrating utility of medical 3D printing related to septal myectomy surgery, cardiomyopathy, and examining the effects of using cardiac surgical simulation for resident education.

Recent Publications

  • Nicardipine Is a Safe, Efficacious, and Cost-Effective Antihypertensive for Neonates and Young Infants Undergoing Cardiac Surgery.
    Lushaj E, Hermsen JL, Nelson K, Amond K, Bogenschutz M, Arndt S, Wilhelm M, Anagnostopoulos PV
    World J Pediatr Congenit Heart Surg 2022 05; 13(3): 341-345
    [PubMed ID: 35446217]

  • Is Porcine Small Intestinal Submucosal Extracellular Matrix (ECM) a Suitable Material for Right Ventricular Outflow Tract Reconstruction in Association With Pulmonary Valve Replacement?
    Burke CR, Lewis E, Schreiter NA, Bartlett H, Krieger EV, Anagnostopoulos PV, Verrier ED, Hermsen JL
    World J Pediatr Congenit Heart Surg 2022 Jan 05; 21501351211069559
    [PubMed ID: 34985359]

  • Unconventional use of total artificial heart in a patient with severe, destructive prosthetic valve endocarditis.
    Johnstad C, Bomareddi S, Hermsen JL, Smith JW, Fiedler AG
    J Card Surg 2022 Feb; 37(2): 443-444
    [PubMed ID: 34766385]

  • National Trends in Heart Donor Usage Rates: Are We Efficiently Transplanting More Hearts?
    Dharmavaram N, Hess T, Jaeger H, Smith J, Hermsen J, Murray D, Dhingra R
    J Am Heart Assoc 2021 08 03; 10(15): e019655
    [PubMed ID: 34315285]

  • The Use of STS Public Reporting to Guide Referrals in Congenital Heart Surgery: Results of a Survey.
    Schreiter N, Hermsen J, Hokanson J, Anagnostopoulos PV
    Ann Thorac Surg 2021 Jul 06;
    [PubMed ID: 34237290]

All Publications on PubMed