NDLI: Are the sites of endocardial origin of the left ventricular papillary muscles primary determinants of the morphology of the normal QRS complex?

Content Provider	IEEE Xplore Digital Library
Author	Robinson, A.M.C. Olson, C.W. Wagner, G. Selvester, R.H. Foster, J. Steedman, T.
Copyright Year	2005
Description	Author affiliation: Glasgow Univ. (Robinson, A.M.C.)
Abstract	There is extensive variation in the appearance of the QRS complex of a standard 12 lead ECG of normal subjects. This study tests the hypothesis that a primary determinant of the morphology of the normal QRS complex of the left ventricle is papillary muscles origin. Magnetic resonance imaging was used to determine the site of endocardial insertion of the papillary muscles. The papillary muscle data was then inputted into a schematic, which was used to guide a simulation of the left ventricular activation. A simulated ECG and vector-cardiogram (VCG) were produced. The 10 subjects used were healthy with no history of cardiac disease. The simulated and original ECGs were compared for each subject; the frontal electrical axis was calculated and compared. VCGs produced for each individual were analyzed and the effect of the papillary muscle position on VCG morphology analyzed. It was found that the simulated and original ECGs for each subject had similar QRS waveforms that showed normal morphologies. The frontal axis had a good correlation but no concordance and the VCG showed the closer the papillary muscle origins to the septum the wider the VCG spread
Starting Page	109
Ending Page	112
File Size	544327
Page Count	4
File Format	PDF
ISBN	0780393376
DOI	10.1109/CIC.2005.1588046
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-25
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Muscles Morphology Electrocardiography Magnetic resonance Magnetic resonance imaging Valves Three dimensional displays Testing Cardiology History
Content Type	Text
Resource Type	Article

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