The diagnosis of heart failure begins with a comprehensive physical examination and a careful assessment of the patient's signs and symptoms. Advances in technology offer various advanced diagnostic methods that aid in confirming the diagnosis. These methods include electrocardiography (ECG), echocardiography (cardiac ultrasound), chest X-ray, scintigraphy, angiography, cardiac magnetic resonance (MRI), and Holter monitoring. In recent years, biomarkers such as elevated NT-proBNP levels in the bloodstream have also played an important complementary role in the diagnosis of heart failure.