Cardiology doctors in yelahanka New Town, Bangalore • Investigations of possible or probable stable angina Electrocardiography A standard 12-lead ECG should be obtained in all patients. This is likely to be normal in almost half of patients with subsequently proven coronary artery disease. Nevertheless, an abnormal trace lends weight to the symptoms and favours further investigation. Chest X-ray Routine radiology is not essential but may reveal important co-morbidities. It should always be performed in those with clinical evidence of hypertension, pericarditis , heart failure or valvular disease, if only as a baseline. It is similarly indicated for patients with suspected or known pulmonary or systemic disease such as rheumatoid arthritis, COPD or alcoholism. Routine blood tests All patients with suspected angina should have the following routine investigations at presentation (NHF grade A recommendation): fasting lipids, including total cholesterol, LDLs, HDLs and triglycerides—risk factors fasting blood sugar—risk factor full blood count—anaemia exacerbates angina serum creatinine—impaired renal function is a risk factor and can be worsened by som