Physiological Background

Einthoven Triangle

Our knowledge about the heart dates back more than two millenia. Already in the days of Aristotle 350 b.c. the importance of the heart was recognized, and it was, in fact, considered to be the most important organ in the body. Other vital organs, such as the brain and lungs, were thought to exist merely to cool the blood. Over two thousand years later, the heart maintains its position as one of the most important, and also most studied, organs in the human body. During the last few decades, the...