Recurrent Supraventricular Tachycardia Following Carboplatin-Docetaxel Chemotherapy: A Hidden Threat in High-Risk Cancer Survivors

Abstract

A 57-year-old male with hypertension, diabetes, prior stroke, and nasopharyngeal carcinoma treated with carboplatin-docetaxel presented with chest pain and palpitations. Electrocardiography revealed unstable supraventricular tachycardia (SVT) requiring multiple electrical cardioversions. Echocardiography showed preserved ejection fraction but abnormal global longitudinal strain and prolonged QTc, indicating subclinical cardiotoxicity. He was stabilized with antiarrhythmic and supportive therapy and discharged after five days. This case highlights that recurrent SVT is a rare complication of carboplatin-docetaxel chemotherapy in high-risk patients. Timely recognition and aggressive management are crucial. Further studies are needed to elucidate the mechanisms and preventive strategies for chemotherapy-induced arrhythmias.