Abstract: This reports an audit of the assessment practices at Christchurch Hospital, compared to international guidelines. The clinical notes of all patients who were re- admitted acutely with chest pain within six months of PCI procedures performed between 1/4/05 and 30/9/05 were audited. Ethics approval was granted and an audit tool was designed based on the 2000 ACC/AHA Guidelines for the management of patients with unstable angina. The purpose of the audit was to determine to what extent best practice guidelines were followed in the assessment of patients re-admitted with chest pain and to determine if there were any indicators (lesional, procedural or risk factors for restenosis) that predicted a normal or abnormal repeat coronary angiogram. 448 consecutive patients had PCI procedures, 36 patients represented acutely with chest pain and had repeat coronary angiography. In 18 patients the coronary angiogram was unchanged, 11 patients demonstrated instent restenosis, one patient demonstrated thrombus and six patients developed new lesions. The authors concluded that at Christchurch Hospital assessment practices are consistent with international guidelines. Of the patients who had repeat angiography, 50% had no coronary obstruction for the cause of pain. There was a relatively low incidence of acute representation with chest pain. These results suggest a revision of the guidelines for repeat angiography following PCI is warranted.