9 May 2019 Equilibrium radionuclide angiocardiography is a diagnostic examination in nuclear medicine. It is performed for the following purposes : To determine the ejection fraction of the left ventricle - LV EF; To assess the contractility of the left ventricle. Equilibrium radionuclide angiocardiography is frequently requested to assess: Patients undergoing cardiotoxic treatment: e.g. chemotherapy that may have toxic effects on the heart, to check for decreases in left ventricular ejection fraction; Patients with stable angina; Dyspnoea patients, when it is unclear whether the cause of dyspnoea is cardiac or pulmonary; Myocardial infarction; Patients with left heart failure. This article was written with the support of physicians and other clinical professionals from the Hospital da Luz network. The content published in the Health Guide is intended for the general public and is provided for informational and educational purposes only. It does not replace individual medical assessment, diagnosis, or personalized clinical advice from a qualified healthcare professional. The content is produced or reviewed by physicians and other healthcare professionals at Hospital da Luz and is based on the knowledge available at the time of publication or the most recent update, as indicated at the beginning of each item.