Cardiology comes from the Greek word "kardia" which means heart and inner self. It is a branch of medicine that deals with the study and diagnosis of the various disorders of the heart.
This branch of medicine is generally subdivided into the following branches:
- Coronary artery disease
- Heart failure
- Valvular heart disease
- Electrophysiology
- Congenital heart defects
This field of medicine started in 1749 at Jean Baptiste de Sénac’s publication of the summary report that gave details of the contemporary knowledge of the heart. Since its integration as a branch of medicine in 1749, the field had a continuing development.

Leopold Auenbrugger discovered that the beating of the heart could be estimated by the sound from the heart returned from tapping on the chest or percussion. On the other hand, René Laënnec is the one responsible for the invention of the stethoscope in 1816.
A more diagnostic approach was made with the invention of electrocardiograph in 1905. But it is in the 20th century and recent years that we have seen a more advanced technique in this field of study.
Aside from electrocardiography, the echocardiography is now an effective and painless way used by cardiologists to see the status of their patients’ heart. Other progressive diagnostic options in the field of cardiology include heart transplants, pacemakers and artificial hearts.
Cardiologists in general focus not only on the treatment of heart diseases but also on the care and maintenance of the heart and therapy for those already had a heart attack.