Vectorcardiography
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Vectorcardiography is a method of recording the magnitude and direction of the electrical forces that are generated by the heart by means of a continuous series of vectors that form curving lines around a central point[1].
Vectorcardiography was developed by E. Frank in the early 30's. Since the human body is a three dimesional structure, the basic idea is to construct 3 orthogonal leads containing all the electric information. The three leads are represented by right-left axis (X), head-to-feet axis (Y) and front-back (anteroposterior) axis (Z).
To calculate Frank’s leads X, Y and Z using the standard leads system, the following expressions[2] are used:
X = -(-0.172 V1 - 0.074 V2 + 0.122 V3 + 0.231 V4 + 0.239 V5 + 0.194 V6 + 0.156 DI - 0.010 DII) (1)
Y = (0.057 V1 - 0.019 V2 - 0.106 V3 - 0.022 V4 + 0.041 V5 + 0.048 V6 - 0.227 DI + 0.887 DII) (2)
Z = -(-0.229 V1 - 0.310 V2 - 0.246 V3 - 0.063 V4 + 0.055 V5 + 0.108 V6 + 0.022 DI + 0.102 DII) (3)
References
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<references />, or <references group="..." />- ↑ Merriam Webster Online. http://dev.m-w.com/medical/vectorcardiographic.
- ↑ G Daniel, G Lissa, D Medina Redondo; et al. (2007). "Real-time 3D vectorcardiography: An application for didactic use". Journal of Physics: Conference Series 90. 90.
