Selection of optimal recording sites for limited lead body surface potential mapping: a sequential selection based approach.
BACKGROUND
In this study we propose the development of a new algorithm for selecting optimal recording sites for limited lead body surface potential mapping. The proposed algorithm differs from previously reported methods in that it is based upon a simple and intuitive data driven technique that does not make any presumptions about deterministic characteristics of the data. It uses a forward selection based search technique to find the best combination of electrocardiographic leads.


METHODS
The study was conducted using a dataset consisting of body surface potential maps (BSPM) recorded from 116 subjects which included 59 normals and 57 subjects exhibiting evidence of old Myocardial Infarction (MI). The performance of the algorithm was evaluated using spatial RMS voltage error and correlation coefficient to compare original and reconstructed map frames.


RESULTS
In all, three configurations of the algorithm were evaluated and it was concluded that there was little difference in the performance of the various configurations. In addition to observing the performance of the selection algorithm, several lead subsets of 32 electrodes as chosen by the various configurations of the algorithm were evaluated. The rationale for choosing this number of recording sites was to allow comparison with a previous study that used a different algorithm, where 32 leads were deemed to provide an acceptable level of reconstruction performance.


CONCLUSIONS
It was observed that although the lead configurations suggested in this study were not identical to that suggested in the previous work, the systems did bear similar characteristics in that recording sites were chosen with greatest density in the precordial region.
Finlay
Dewar D
DD
School of Computing and Mathematics, Faculty of Engineering, University of Ulster, Belfast, Northern Ireland. d.finlay@ulster.ac.uk
Nugent
Chris D
CD
Donnelly
Mark P
MP
Lux
Robert L
RL
McCullagh
Paul J
PJ
Black
Norman D
ND
D000465:Algorithms; D018780:Body Surface Potential Mapping / Q000295:instrumentation* / Q000592:standards; D016022:Case-Control Studies; D003657:Decision Making; D016002:Discriminant Analysis; D004566:Electrodes; D006801:Humans; D009203:Myocardial Infarction / Q000175:diagnosis*; D012016:Reference Values; D012189:Retrospective Studies