University of Wisconsin–Madison

Joshua Hermsen, MD

Assistant Professor

  • Section of Pediatric Cardiothoracic Surgery
  • Division of Cardiothoracic Surgery


  • 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

    • Papillary muscle rupture following routine aortic valve replacement.
    • Fiedler AG, De Oliveira NC, Hermsen JL
    • J Card Surg 2019 Sep 02;
    • [PubMed ID: 31475399]
    • Helpful sternal wound vacuum-assisted closure techniques in two open chest situations: Central extracorporeal membrane oxygenation and sternal infection.
    • Schreiter NA, McCarthy DP, Fiedler AG, Young N, Demarais D, Anagnostopoulos PV, Hermsen JL
    • J Card Surg 2019 Aug 23;
    • [PubMed ID: 31441530]
    • Flipping the Classroom: How to Optimize Learning in the Didactic Setting.
    • Hermsen JL, Mokadam NA, Verrier ED
    • Thorac Surg Clin 2019 Aug; 29(3): 279-284
    • [PubMed ID: 31235296]
    • The Mitral Monobloc: A Simplification for Intervalvular Fibrous Body Reconstruction in Endocarditis.
    • Hermsen JL, Lushaj EB, De Oliveira NC
    • Ann. Thorac. Surg. 2019 Sep; 108(3): e213-e215
    • [PubMed ID: 31026434]
    • Methods for verification of 3D printed anatomic model accuracy using cardiac models as an example.
    • Odeh M, Levin D, Inziello J, Lobo Fenoglietto F, Mathur M, Hermsen J, Stubbs J, Ripley B
    • 3D Print Med 2019 Mar 29; 5(1): 6
    • [PubMed ID: 30923948]

All Publications on PubMed