What if a heart transplant patient doesn’t look like they’re in cardiogenic shock, but their graft is quietly failing?

In this episode of SoCCC Pre-Rounds, host Dr. Balim Senman sits down with Dr. Shashank Sinha, advanced heart failure and transplant cardiologist, Director of the CICU at Inova Heart and Vascular Institute, and co-chair of the SoCCC Research Council, for a practical discussion on recognizing, diagnosing, and managing acute graft dysfunction and heart transplant rejection.

Designed for residents, fellows, intensivists, and CICU teams, this episode explores why rejection should never be considered in isolation. Dr. Sinha emphasizes maintaining a broad differential that includes infection, tamponade, pulmonary embolism, mixed shock, and other causes of graft dysfunction.

The conversation covers the unique physiology of the denervated transplanted heart and why significant hemodynamic compromise may develop before hypotension. Dr. Sinha discusses the limitations of troponin and BNP, the importance of lactate and end-organ function trends, and the role of physical examination, point-of-care ultrasound, invasive hemodynamics, and endomyocardial biopsy.

The episode also breaks down the critical first hour of management, when empiric steroids may be appropriate before biopsy, how to approach simultaneous concern for infection and rejection, and the differences between acute cellular and antibody-mediated rejection. Advanced therapies including plasmapheresis, IVIG, immunomodulatory treatment, and temporary mechanical circulatory support are also discussed.

Key Takeaways

• Acute rejection is only one potential cause of graft dysfunction, so a broad differential is essential.

• Heart transplant recipients can develop significant shock before becoming hypotensive.

• Lactate, renal function, urine output, and tissue perfusion trends may be more informative than isolated cardiac biomarkers.

• Endomyocardial biopsy remains the gold standard for diagnosing transplant rejection.

• Stabilization, diagnostic evaluation, and empiric treatment may need to happen in parallel.

• Early involvement of transplant and multidisciplinary shock teams is critical.

In This Episode

[00:00] Introduction

[01:15] Meet Dr. Shashank Sinha

[01:59] Post-transplant case presentation

[02:52] Differential diagnosis for graft dysfunction

[03:33] Timing and risk of rejection

[04:38] Concerning clinical presentations

[06:24] Cardiac denervation

[08:05] Diagnostic evaluation and lab work

[10:33] Imaging and invasive hemodynamics

[11:47] The first hour of management

[13:54] Infection vs. rejection

[14:49] Types of rejection and treatment

[17:00] Advanced therapies and mechanical support

[19:19] Assessing graft recovery

[21:09] Key takeaways

[22:21] Closing remarks

Notable Quotes

[01:45] “Graft dysfunction and transplant rejection really reflect the true multidisciplinary nature of cardiac critical care, and this is one of the most treatable causes of cardiogenic shock if recognized early.” — Dr. Shashank Sinha

[05:47] “One mistake that I do see commonly is waiting for transplant patients to become hypotensive before we get very worried.” — Dr. Shashank Sinha

Resources and Links

Become a member:

https://www.soccc.org/subscribe

Dr. Shashank Sinha

https://www.inova.org/doctors/shashank-s-sinha-md

https://in.linkedin.com/in/dr-shashank-sinha

Dr. Balim Senman

https://www.linkedin.com/in/balim-senman-7561436b/

https://x.com/BalimSenmanMD

https://www.soccc.org/

Supported By

This episode is made possible by unrestricted support from Zoll LifeVest — thanks for keeping high-impact education free for our community.

Disclaimer

This podcast is not medical advice, just candid, practical discussions about what your hosts do every day in the CICU. Always consult your supervising team and current guidelines before applying any interventions.