5-fluorouracil cardiotoxicity is increasingly recognized with variable presentation. We report a patient who developed cardiogenic shock due to high-dose 5-fluorouracil infusion (1,000 mg/m2 every 24 hr for 96 hr). There was no evidence of myocardial necrosis. The patient recovered completely without any residual cardiac dysfunction. The exact cause of 5-fluorouracil toxicity remains to be determined. The case highlights the need for careful monitoring of patients who receive high-dose 5-fluorouracil for the development of cardiotoxicity.
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