Myocarditis associated with immune checkpoint inhibitor therapy: a case report of three patients

Emergency Radiology
Kianoush Ansari-GilaniNikhil H Ramaiya

Abstract

Immune checkpoint inhibitor (ICI)-associated myocarditis is a rare but potentially fatal complication associated with development of other immune-related adverse events (irAEs). Troponin levels, ECG, echocardiography, and cardiac MR can assist with the diagnosis of this rare albeit serious adverse effect related to immunotherapy. In this case report, we present the clinical and radiological features of myocarditis in three patients presenting with acute symptoms while receiving therapy with ICIs. Blood troponin and ECG were abnormal in all three myocarditis cases. Initial echocardiography was abnormal in two patients with reduced left ventricular ejection fraction (LVEF). The third patient demonstrated an initially normal LVEF with subsequent transient decrease in LVEF on follow-up echocardiogram. Cardiac MR was abnormal in three cases with areas of mid-myocardial/epicardial delayed enhancement. All patients experienced additional irAEs. One patient died shortly after myocarditis diagnosis, one was made comfort care due to poor clinical status, and one improved with steroid treatment.

References

Apr 25, 2009·Journal of the American College of Cardiology·Matthias G FriedrichUNKNOWN International Consensus Group on Cardiovascular Magnetic Resonance in Myocarditis
Jul 5, 2013·European Heart Journal·Alida L P CaforioUNKNOWN European Society of Cardiology Working Group on Myocardial and Pericardial Diseases
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