T-Wave Variability for the Prediction of Fast Ventricular Arrhythmias Prospective, Observer-Blind Study
Background:The clinical value of T-wave variability (T-var) for ventricular arrhythmia (VA) risk prediction was evaluated.Methods and Results:Three 20-min Holter-ECG-based T-var measurements (I1 at baseline, I2 after 6.5±1.6 months and I3 after 13.1±2.0 months) were done in 121 patients. T-var was d...
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Published in | Circulation Journal Vol. 79; no. 2; pp. 318 - 324 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Japan
The Japanese Circulation Society
2015
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Subjects | |
Online Access | Get full text |
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Summary: | Background:The clinical value of T-wave variability (T-var) for ventricular arrhythmia (VA) risk prediction was evaluated.Methods and Results:Three 20-min Holter-ECG-based T-var measurements (I1 at baseline, I2 after 6.5±1.6 months and I3 after 13.1±2.0 months) were done in 121 patients. T-var was defined as the amplitude variability of the T-wave with the maximum of T-wave oscillation. The endpoint was a fast, potentially fatal VA (>240 beats/min). During follow-up (20±4 months) 20/121 patients (55% ischemic heart disease, 15% preserved left ventricular ejection fraction [LVEF]) had fast VA terminated by ICD or external shock. Although T-var did not differ between patients with vs. without fast VA at baseline (I1: 10.7±7.3 µV vs. 7.8±4.1 µV, P=0.170), patients with fast VA had higher T-var compared to those without fast VA at 2 subsequent measurements (I2: 14.0±6.5 µV vs. 8.2±3.6 µV, P=0.030; I3: 17.0±5.4 µV vs. 8.8±4.6 µV, P=0.004). The increase in T-var between I1 and I2 was higher in patients with fast VA (∆T-var=7.0±9.3 µV), as compared to patients without (∆T-var=0.4±4.3 µV). After adjustment for LVEF in a multiple logistic regression model, the odds ratio for developing fast VA was 1.1 (P=0.056) for each 1-µV increment in T-var at I1.Conclusions:T-var is elevated in patients with fast VA, and both elevation of T-var and increase in T-var may complement LVEF in VA risk stratification. (Circ J 2015; 79: 318–324) |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Undefined-1 ObjectType-Feature-3 content type line 23 |
ISSN: | 1346-9843 1347-4820 |
DOI: | 10.1253/circj.CJ-14-1028 |