title: Posterior body surface potential mapping using capacitive-coupled electrodes and its application.
abstract: Using 49 capacitive-coupled electrodes, mattress-type harness was developed to obtain posterior body surface potential map (P-BSPM) in dressed individuals. The aim of this study was to investigate how valuable information P-BSPM could provide, especially in discrimination of old myocardial infarction (OMI). P-BSPM of 59 individuals were analyzed; 23 normal control, 11 right bundle branch block (RBBB), 3 left bundle branch block (LBBB) and 19 OMI patients. Principal component analysis and linear hyper-plane approach were used to evaluate diagnostic performance. The axes of P-BSPM vector potential corresponded well with 12-lead electrocardiogram. During QRS, the end point of P-BSPM vector potential demonstrated characteristic clockwise rotation in RBBB, and counterclockwise rotation in LBBB patients. In OMI, initial negativity on P-BSPM during QRS was more frequently located at lower half, and also stronger in patients with inferior myocardial infarction (MI). The area under the receiver-operating characteristic curve of P-BSPM during QRS in diagnosing overall OMI, anterior MI, and inferior MI was 0.83 (95% confidence interval, 0.70-0.97), 0.71 (0.47-0.94), and 0.98 (0.94-1.0), respectively (P = 0.022 for anterior vs inferior MI groups). In conclusion, the novel P-BSPM provides detailed information for cardiac electrical dynamics and is applicable to diagnosing OMI, especially inferior myocardial infarction.
authors.affiliation: Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Youngjin
authors.initials: Y
authors.lastname: Cho
authors.forename: Seungmin
authors.initials: S
authors.lastname: Lee
authors.forename: Eue-Keun
authors.initials: EK
authors.lastname: Choi
authors.forename: Hyo Eun
authors.initials: HE
authors.lastname: Park
authors.forename: Kwang-Suk
authors.initials: KS
authors.lastname: Park
authors.forename: Seil
authors.initials: S
authors.lastname: Oh
mesh_terms: D000328:Adult; D000368:Aged; D019540:Area Under Curve; D018780:Body Surface Potential Mapping / Q000295:instrumentation / Q000379:methods*; D002037:Bundle-Branch Block / Q000175:diagnosis; D004562:Electrocardiography; D004566:Electrodes; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis; D025341:Principal Component Analysis; D012372:ROC Curve