Introduction: Arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) is a rare hereditary condition characterized by structural abnormalities of the right ventricle, often linked to ventricular arrhythmias. Family history analysis, diagnostic procedures, and appropriate treatment are critical to prevent sudden death, with heart transplantation as the only definitive cure. (1, 2)

Case report: This case presents late-onset ARVD/C in a 38-year-old woman. Diagnosis was confirmed through ECG, MSCT, cardiac MRI, genetic mutation analysis, and frequent ventricular tachycardia from the right ventricle, leading to implantable cardioverter defibrillator implantation as secondary prevention. Despite amiodarone treatment in August 2023, her condition worsened, with increasing heart failure symptoms and NT-proBNP levels, necessitating heart transplantation. The patient underwent heart transplantation in September 2024, followed by a complicated postoperative course. She initially developed metabolic acidosis and rising lactate levels, requiring inotropic and vasopressor support, along with broad-spectrum antibiotics (vancomycin and meropenem). By the third postoperative day, continuous veno-venous hemodiafiltration was needed due to oliguria. Inflammatory markers decreased, and her condition gradually stabilized. Microbiological testing showed urinary colonization with Klebsiella oxytoca and Morganella, both sensitive to ceftriaxone, which was administered. After gradual improvement, including weaning from mechanical ventilation and vasopressor support, she was transferred to the cardiac surgery unit. A myocardial biopsy confirmed good graft function. She was discharged hemodynamically stable, continuing immunosuppressive therapy with regular follow-up.

Conclusion: This case highlights the complexity of managing patients with advanced ARVD/C, demonstrating the need for continuous nursing education to ensure comprehensive post-transplant care and optimal patient outcomes.