Vitamin K-induced cardiovascular collapse.

A patient underwent a partial right hepatic lobectomy for adenocarcinoma of the colon metastatic to the liver. He was admitted to the surgical intensive care unit in stable condition. Six hours after surgery, the patient experienced sudden and sever hypotension, bradycardia, and systole. Differential diagnoses included acute myocardial infarction, hemorrhage from the surgical site, and pulmonary embolism. However, these complications were ruled out. We believe that an allergic reaction to vitamin K and its potential side effects are discussed.