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T-variability index as a predictor of sudden cardiac death in patients with dilated cardiomyopathy = Napovedana vrednost indeksa variabilnosti vala T za nenadno srčno smrt pri bolnikih z dilatativno kardiomiopatijoTasič, Jerneja ; Zupan, Igor, 1961-T-wave alternans is an important identifier of patients at risk of sudden cardiac death (SCD), but it has to be assessed during an exercise test or atrial pacing. In the study, the T-variability ... index (TVar) was used as a stratifying parameter for SCD for which exercise testing or atrial pacing is not required. The oscillating weighting factor (OWF), which shows recurring alternans over a cluster of beats, and T-amplitude variance (TAV), which is a square root of the local variance, are key factors in the TVar index. Methods.57 patients with both sinus rhythm and LVEF equal to or less than 40% were included in the study. 34 (59.6%) received an implantable cardioverter-defibrillator (ICD) after surviving SCD and the remaining (40.4%)were patients with ischemic or nonischemic cardiomyopathy who were not affected by sCD. A 20-minute high resolution ECG recording for TVar assessmentwas performed in both groups of patients in the supine position. Results. Non-parametric two-independent-samples test proved that the TVar index is a statistically important predictor of SCD (p=0.042). The binary logistic regression test proved the link between TVar and probable SCD (p=0.042). The value of TVar equal or minor to 0.001976 mV was established as a risk parameter For SCD with a 95% probability. Conclusion. TVar as a method of T-wave variability assessment does not require exercise testing or atrial pacing. It proves to be a good risk stratifier For SCD.Source: Slovenska kardiologija : znanstveno strokovna revija za področje srčno-žilne medicine. - ISSN 1581-8543 (Letn. 5, št. 1, 2008, str. 28-30)Type of material - article, component partPublish date - 2008Language - englishCOBISS.SI-ID - 24471257
source: Slovenska kardiologija : znanstveno strokovna revija za področje srčno-žilne medicine. - ISSN 1581-8543 (Letn. 5, št. 1, 2008, str. 28-30)
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Database name | Field | Year |
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Tasič, Jerneja | 33347 |
Zupan, Igor, 1961- | 10726 |
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