Cardiology deals with the study and treatment of disorders of heart and blood vessels. In Greek words cardia means heart and logy means study of. It is one of the branches of medicine and the physicians who specialized in this field are cardiologists. The way in which heart processes oxygen and nutrients in the blood is the basic function of cardiovascular system. Cardiologist suggests about preventing heart diseases. There are many symptoms which indicate heart problems some of them are dizziness, changes in heart rate, arrhythmias, chest pains, shortness in breath, high blood pressure. The tests which are performed under this field are ECG, echocardiogram, cardiac imaging, stress test, electrophysiology study etc.

The heart diseases include: