Successful Recovery After Immune Checkpoint Inhibitor Induced Myocarditis And Cariogenic ShockIn A Patient With Urothelial Cancer:A Case Report (HFSA 2023)
Case Report A 69 -yo f with a PMH of type 2 DM, hypertension, obstructive sleep apnea, high-grade PT3NO urothelial cancer with status post-cystectomy, and two cycles of ICI with nivolumab presented to the clinic 11 days following her second dose of chemotherapy with nivolumab with symptoms of dyspnea...Myocardial biopsy results showed interstitial lymphocyte infiltrates with myocardial injury confirming the suspected diagnosisGoal-directed medical therapy was initiated for heart failure with a newly reduced ejection fraction with IV lasix, hydralazine, and isosorbide dinitrate...Even though evidence guiding treatment of ICI-induced myocarditis is not evidence-based, inflammatory responses of a higher grade on endomyocardial biopsy should prompt intensification of immunosuppression with regimens like mycophenolate mofetil,abatacept or alemtuzumab (11-13) in addition to high-dose steroids...This case described the diagnostic approach and management of ICI-induced myocarditis with third-degree heart block and cardiogenic shock. Initial workup with cardiac biomarkers, ECG, TTE, and myocardial biopsy during right heart catheterization was critical in treatment decision-making and ruling out other potential causes.