A 61-year-old male with a history of metastatic colorectal cancer was referred to our hospital for primary coronary intervention because of acute ST-elevation myocardial infarction. Coronary angiography, however, revealed no significant stenoses. When asked, the patient revealed that capecitabine (Xeloda ® ) was started by his oncologist one day before admission. It is known that this oral 5-FU analogue drug, used in metastatic colorectal cancer, can cause coronary artery spasms. A 61-year-old male was admitted to a referring hospital because of acute chest pain. Three years ago he had suffered an acute coronary syndrome. Coronary angiography (CAG) showed focal coronary sclerosis in the right coronary artery, but no obstructive lesions and the patient was treated conservatively with aspirin, metoprolol, isosorbide-5-mononitrate and rosuvastatin. Furthermore, he had colon cancer with metastases in the liver and the lungs.After dinner the patient experienced 30 minutes of retrosternal chest pain without radiation. Because the chest pain was not relieved by sublingual nitroglycerin he contacted his general practitioner who sent him to hospital for observation. At the referring hospital he had no symptoms. The electrocardiogram (ECG) at admittance showed sinus rhythm with early repolarisation (figure 1). Four hours after admission, while waiting for the second troponin, there was recurrence of heavy retrosternal chest discomfort with radiation to the left arm. A new ECG was taken immediately and revealed sinus rhythm with ST-segment elevation in the inferolateral leads and peaked T-waves ( figure 2). An ST-elevation myocardial infarction was diagnosed and he was sent to our hospital for primary coronary intervention. Immediate treatment with 600 mg clopidogrel, 5000 units heparin and 160 mg aspirin was initiated and he was sent directly to our catheterisation laboratory. At presentation to the catheterisation laboratory he was free of symptoms. CAG revealed diffuse coronary sclerosis, but no significant stenosis in the coronary arteries with TIMI 3 flow in all vessels. In comparison with his CAG performed three years ago, no changes were seen. He was admitted to the coronary care unit. His blood pressure was 134/70 mmHg and the pulse 77 beats/min. There was no fever. No abnormalities were discovered on physical examination. The cardiac enzymes and the inflammation parameters were not elevated. His renal function was normal. Transthoracic echocardiography showed normal left and right ventricular function and no pericardial effusion. Two hours later, the severe chest discomfort returned with ST-segment elevation similar to the ECG at the referring hospital and nitroglycerin IV was started. Because of the intermittent character of his complaints with concomitant ST-segment changes, coronary artery vasospasms were now suspected as the cause of the symptoms. When asked, the patient revealed that capecitabine (Xeloda ® ) 1500 mg twice a day had been started just one day earlier. Capecitabine can indeed cause coronary arte...