Derivation of orthogonal leads from the 12-lead ECG. Accuracy of a single transform for the derivation of atrial and ventricular waves

M. S. Guillem, Alan Varteres Sahakian, Steven Swiryn*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Scopus citations

Abstract

Vectorcardiograms are not usually recorded in clinical practice and must be derived from the conventional 12-lead ECG, for example by making use of Dower's transform. However, its accuracy for the derivation of the P wave is questionable. We tested the accuracy of Dower's transform on the P-wave and compared with a P-wave optimized transform in a database of 123 simultaneous recordings of ECGs and VCGs. This new transform achieved a lower error when we compared derived vs. true measured P-waves (12.2 ± 7.96 μVRMS) than Dower's transform (14.4 ± 9.5 μVRMS) and higher correlation values (Rx=0.93 ± 0.12, Ry= 0.90 ± 0.27, Rz=0.91 ± 0.18 vs. Dower's: Rx=0.88 ± 0.15, Ry=0.91 ± 0.26 , Rz=0.85 ± 0.23). We concluded that derivation of P-waves and QRS complexes VCGs were optimized by the use of different transform matrices for each wave in this database.

Original languageEnglish (US)
Title of host publication2006 Computers in Cardiology, CIC
Pages249-252
Number of pages4
Volume33
StatePublished - Dec 1 2006
Event2006 Computers in Cardiology, CIC - Valencia, Spain
Duration: Sep 17 2006Sep 20 2006

Other

Other2006 Computers in Cardiology, CIC
CountrySpain
CityValencia
Period9/17/069/20/06

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ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Software

Cite this

Guillem, M. S., Sahakian, A. V., & Swiryn, S. (2006). Derivation of orthogonal leads from the 12-lead ECG. Accuracy of a single transform for the derivation of atrial and ventricular waves. In 2006 Computers in Cardiology, CIC (Vol. 33, pp. 249-252). [4511835]