What Is ECG and How Does It Work?
What Is ECG and How Does It Work? ECG (electrocardiography) is a method of collecting electrical signals generated by the heart. This allows us to understand the level of physiological arousal that someone is experiencing, but it can also be used to better understand someone’s psychological state. Below we’ll go through the importance of physiological arousal in emotions, the physiology of the heart, how the activity can be measured, and what parameters are of interest. Physiology and function of the heart Before deepening the basics of ECG, let's look at the basics of cardiac physiology and function: The heart has four rooms. The two upper chambers (left / right atria) are entry points into the heart, while the two lower chambers (left / right ventricles) are contraction chambers that send blood to the body. The circulation is divided into a "loop" through the lungs (pulmonary) and another "loop" through the body (systemic). The cardiac c