Influence of individual torso geometry on inverse solution to 2 dipoles.

BACKGROUND The purpose of this study was to observe the influence of variety in individual torso geometries on the results of inverse solution to 2 dipoles. METHODS The inverse solution to 2 dipoles was computed from the measured data on 8 patients using either standard torso with various shapes and sizes of the heart and lungs in it or using various outer torso geometries with the same inhomogeneities. The vertical position of the heart relative to the fourth intercostal level was kept constant in all models. The results were compared with the reference solution computed in standard torso. RESULTS The inverse solution was influenced in 4 of 8 cases by changes of torso geometry and only in 1 of 8 cases by changes of internal inhomogeneities. CONCLUSIONS The use of individual torso geometry with the knowledge of the true heart position is very important for correct inverse results.

[1]  R. Hren,et al.  Value and limitations of an inverse solution for two equivalent dipoles in localising dual accessory pathways , 2003, Medical and Biological Engineering and Computing.

[2]  M Tysler,et al.  Noninvasive assessment of local myocardium repolarization changes using high resolution surface ECG mapping. , 2007, Physiological research.

[3]  Marie-Claude Trudel,et al.  Simulation of QRST integral maps with a membrane-based computer heart model employing parallel processing , 2004, IEEE Transactions on Biomedical Engineering.

[4]  R. Macleod,et al.  Short titles: Inverse Problems in Electrocardiology , 2022 .

[5]  R Hoekema,et al.  Interindividual variability of multilead electrocardiographic recordings: influence of heart position. , 1999, Journal of Electrocardiology.

[6]  R. Macleod,et al.  The effect of intrathoracic heart position on electrocardiogram autocorrelation maps. , 2005, Journal of electrocardiology.

[7]  M. Fereniec,et al.  The 64 channel system for high resolution ECG mapping , 2001, Computers in Cardiology 2001. Vol.28 (Cat. No.01CH37287).

[8]  Jukka Nenonen,et al.  ST-T integral and T-wave amplitude in detection of exercise-induced myocardial ischemia evaluated with body surface potential mapping. , 2003, Journal of electrocardiology.

[9]  R. Maniewski,et al.  Identification of Ischemic Lesions Based on Difference Integral Maps, Comparison of Several ECG Intervals , 2009 .

[10]  G. Huiskamp,et al.  Tailored versus realistic geometry in the inverse problem of electrocardiography , 1989, IEEE Transactions on Biomedical Engineering.

[11]  R. Maniewski,et al.  Relation between depolarization and repolarization phases in body surface QRST integral map , 2007, 2007 Computers in Cardiology.

[12]  C L Feldman,et al.  Optimal electrocardiographic leads for detecting acute myocardial ischemia. , 2001, Journal of electrocardiology.

[13]  Robert Modre,et al.  A comparison of noninvasive reconstruction of epicardial versus transmembrane potentials in consideration of the null space , 2004, IEEE Transactions on Biomedical Engineering.

[14]  Barbara Drew,et al.  Optimal leads, estimation, and continuous monitoring improve detection of acute MI and transient ischemia. , 2004, Journal of electrocardiology.