An electrocardiogram (ECG) is a graphic recording of the changes occurring in the electrical potentials between different sites on the skin (leads) as a result of cardiac activity. Depolarization of the cardiac cells is the central electrical event of the heart. This occurs when the cardiac cells, which are electrically polarized, lose their internal negativity. Depolarization is distributed from cell to cell, producing a wave of depolarization that can be transmitted across the entire heart. This wave represents a flow of electricity and it can be detected by electrodes placed on the surface of the body. Once depolarization is complete, the cardiac cells are able to restore their resting polarity through a process called repolarization. This flow of electricity can also be sensed by recording electrodes.
One common placement of the electrodes is based on Einthoven’s triangle, which is an imaginary triangle drawn around the volume of the heart. Each apex of the triangle represents where the body’s composition, around the heart, connects electrically with the limbs. Einthoven’s law states that if the values for any two points of the triangle are known, the third can be computed.
This Application Note details 1-lead ECG, 3-lead ECG, 6-lead ECG, and 12-lead ECG.
See also: Continuous 12-lead ECG – App Note #AH-206
MedelOpt® Mobility systems provide high-density NIRS with EEG available in a flexible, adaptable headset for high density mapping with complete mobility with an unlimited range of acquisition for up to 8 hours. MedelOpt Mobility adjusts to real-world situations or virtual reality (VR) environments with a specific design to fit any head mounted VR display. Use for […]
View AllDiscovering and understanding what motivates humans to produce better results has intrigued many researchers. Many researchers have explored the psychophysiological processes that drive our behavior. Here are some recent studies that have used BIOPAC systems to research motivation… Motivation and Pleasure Deficits Undermine the Benefits of Social Affiliation in Psychosis. Blanchard, J. J., Smith, J. […]
Eye tracking technology has come a long way and has enabled researchers to conduct mobile experiments and track participants in real world scenarios. These featured studies demonstrate some of the use cases for mobile eye tracking technology. Here are some recent studies that have used BIOPAC systems for eye tracking research… Drivers’ gaze patterns when resuming […]
Read All