Cardio-oncology is the cardiology branch handling cardiovascular issues triggered by chemotherapy and radiotherapy. It focuses on early detection, ongoing monitoring, and treatment. Nuclear cardiology assesses, diagnoses, and treats heart problems with radioactive materials and imaging. Non-invasive methods visualize heart attack extent, myocardial blood flow, and pumping ability. Popular techniques include myocardial perfusion imaging, radionuclide ventriculography, and PET scans.