Journal
ADVANCES IN PHYSIOLOGY EDUCATION
Volume 36, Issue 4, Pages 319-324Publisher
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/advan.00029.2012
Keywords
Einthoven triangle; electrocardiogram; laboratory; medical education
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Funding
- NIGMS NIH HHS [R01 GM076063] Funding Source: Medline
- NINDS NIH HHS [R01 NS072377] Funding Source: Medline
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Jin BE, Wulff H, Widdicombe JH, Zheng J, Bers DM, Puglisi JL. A simple device to illustrate the Einthoven triangle. Adv Physiol Educ 36: 319-324, 2012; doi:10.1152/advan.00029.2012.-The Einthoven triangle is central to the field of electrocardiography, but the concept of cardiac vectors is often a difficult notion for students to grasp. To illustrate this principle, we constructed a device that recreates the conditions of an ECG reading using a battery to simulate the electrical vector of the heart and three voltmeters for the main electrocardiographic leads. Requiring minimal construction with low cost, this device provides hands-on practice that enables students to rediscover the principles of the Einthoven triangle, namely, that the direction of the cardiac dipole can be predicted from the deflections in any two leads and that lead I + lead III + lead II independent of the position of heart's electrical vector. We built a total of 6 devices for classes of 30 students and tested them in the first-year Human Physiology course at the University of California-Davis School of Medicine. Combined with traditional demonstrations with ECG machines, this equipment demonstrated its ability to help medical students obtain a solid foundation of the basic principles of electrocardiography.
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