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Titolo:
SPATIAL-DISTRIBUTION OF QT INTERVALS - AN ALTERNATIVE APPROACH TO QT DISPERSION
Autore:
VANLEEUWEN P; HAILER B; WEHR M;
Indirizzi:
RES & DEV CTR MICROTHERAPY EFMT,DEPT BIOMAGNETISM,UNIV STR 142 D-44799 BOCHUM GERMANY AUGUSTA KRANKENANSTALT,DEPT CARDIOL BOCHUM GERMANY
Titolo Testata:
PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY
fascicolo: 11, volume: 19, anno: 1996,
parte:, 2
pagine: 1894 - 1899
SICI:
0147-8389(1996)19:11<1894:SOQI-A>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACUTE MYOCARDIAL-INFARCTION; CARDIAC DEATH; SUDDEN-DEATH; REPOLARIZATION; PROLONGATION;
Keywords:
QT DISPERSION; MAGNETOCARDIOGRAPHY; MYOCARDIAL INFARCTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
P. Vanleeuwen et al., "SPATIAL-DISTRIBUTION OF QT INTERVALS - AN ALTERNATIVE APPROACH TO QT DISPERSION", PACE, 19(11), 1996, pp. 1894-1899

Abstract

QT dispersion (QTd) describes the heterogeneity of ventricular repolarization on the basis of the temporal range of QT intervals as measured in the 12-lead EGG. We examined the spatial distribution of QTd using multichannel magnetocardiograms (MCGs), which noninvasively registerchanges in magnetic field strength at 37 sites over the heart. As in EGG, the MCG signal in each channel may be used to measure QT interval. By calculating QT deviation from QT(min), at-each site, one can reconstruct the spatial distribution of QTd. Analysis of spatial QTd in ten healthy subjects and ten patients after acute myocardial infarction (MI) showed clear differences in spatial distribution. The healthy subjects generally displayed shorter QT intervals along a line corresponding to the approximate position of the septum with longer intervals inplateaus in the upper right and lower left. Spatial QTd of the post-Ml patients deviated from this pattern, often displaying a sharp rise in QT duration over specific areas, which could be related to functional and morphological disturbances. The quantification of local irregularities as well as the overall pattern on the basis of a smoothness index allowed better discrimination between healthy subjects and post-MI patients than QTd. Distribution patterns of QTd which reflect local repolarization alterations may thus represent a more differentiated marker for pathology and risk.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/10/20 alle ore 14:33:57