Name
Title | ||
|---|---|---|
Spatial indices of repolarization correlate with non-ST elevation myocardial ischemia in patients with chest pain. |
Abstract | ||
|---|---|---|
Mild-to-moderate ischemia does not result in ST segment elevation on the electrocardiogram (ECG), but rather non-specific changes in the T wave, which are frequently labeled as non-diagnostic for ischemia. Robust methods to quantify such T wave heterogeneity can have immediate clinical applications. We sought to evaluate the effects of spontaneous ischemia on the evolution of spatial T wave changes, based on the eigenvalues of the spatial correlation matrix of the ECG, in patients undergoing nuclear cardiac imaging for evaluating intermittent chest pain. We computed T wave complexity (TWC), the ratio of the second to the first eigenvalue of repolarization, from 5-min baseline and 5-min peak-stress Holter ECG recordings. Our sample included 30 males and 20 females aged 63 ± 11 years. Compared to baseline, significant changes in TWC were only seen in patients with ischemia (n = 10) during stress testing, but not among others. The absolute changes in TWC were significantly larger in the ischemia group compared to others, with a pattern that seemed to depend on the severity or anatomic distribution of ischemia. Our results demonstrate that ischemia-induced changes in T wave morphology can be meaningfully quantified from the surface 12-lead ECG, suggesting an important opportunity for improving diagnostics in patients with chest pain. |
Year | DOI | Venue |
|---|---|---|
2018 | 10.1007/s11517-017-1659-1 | Med. Biol. Engineering and Computing |
Keywords | Field | DocType |
Ischemia,Ventricular repolarization dispersion,T wave,Electrocardiogram | ST segment,ST elevation,Internal medicine,Stress testing,Anesthesia,Cardiology,Ischemia,Benign early repolarization,Chest pain,Cardiac imaging,Repolarization,Mathematics | Journal |
Volume | Issue | ISSN |
56 | 1 | 0140-0118 |
Citations | PageRank | References |
2 | 0.44 | 1 |
Authors | ||
6 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Salah Al-Zaiti | 1 | 2 | 0.44 |
| Ervin Sejdic | 2 | 146 | 25.55 |
| Jan Nemec | 3 | 2 | 0.44 |
| Clifton Callaway | 4 | 2 | 0.44 |
| Prem Soman | 5 | 2 | 0.44 |
| Robert L Lux | 6 | 15 | 2.74 |