Detection and quantification of acute myocardial ischemia by morphologic evaluation of QRS changes by an angle-based method

Romero, Daniel; Ringborn, Michael; Laguna, Pablo; Pueyo, Esther

doi:10.1016/j.jelectrocard.2013.02.014

Cited by 27 publications

(24 citation statements)

References 23 publications

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“…We report two major findings: Our data corroborate and extend findings from previous studies: Small preliminary studies have suggested potential value for markers of depolarization, such as highfrequency components within the QRS complex 31,32 or for changes in QRS slopes, angles and vectors. 33,34 More recently, Al-Zaiti and coworkers found that the T-wave complexity ratio as a marker of ventricular repolarization dispersion correlated with ischemic injury in patients with suspected NSTEMI and reached an AUC of 0.70. 35 The hypothesis, that heterogeneity in ventricular repolarization is larger during AMI was confirmed in our study.…”

Section: Discussionmentioning

confidence: 99%

Diagnostic and prognostic values of the V-index, a novel ECG marker quantifying spatial heterogeneity of ventricular repolarization, in patients with symptoms suggestive of non-ST-elevation myocardial infarction

Abächerli

Twerenbold

Boeddinghaus

et al. 2017

International Journal of Cardiology

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Section: Discussionmentioning

confidence: 99%

Diagnostic and prognostic values of the V-index, a novel ECG marker quantifying spatial heterogeneity of ventricular repolarization, in patients with symptoms suggestive of non-ST-elevation myocardial infarction

Abächerli

Twerenbold

Boeddinghaus

et al. 2017

International Journal of Cardiology

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“…On the other hand, given its robustness to noise and artifacts, it can also enable real-time ECG morphology analysis even under challenging conditions such as during physical exercise. Finally, and as a byproduct of the detection process, the slopes and tangents actually have clinical value, for example in detecting and characterizing myocardial ischemia (Pueyo et al 2008 ; Romero et al 2013 ).…”

Section: Discussionmentioning

confidence: 99%

A novel low-complexity post-processing algorithm for precise QRS localization

et al. 2014

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Precise localization of QRS complexes is an essential step in the analysis of small transient changes in instant heart rate and before signal averaging in QRS morphological analysis. Most localization algorithms reported in literature are either not robust to artifacts, depend on the sampling rate of the ECG recordings or are too computationally expensive for real-time applications, especially in low-power embedded devices. This paper proposes a localization algorithm based on the intersection of tangents fitted to the slopes of R waves detected by any QRS detector. Despite having a lower complexity, this algorithm achieves comparable trigger jitter to more complex localization methods without requiring the data to first be upsampled. It also achieves high localization precision regardless of which QRS detector is used as input. It is robust to clipping artifacts and to noise, achieving an average localization error below 2 ms and a trigger jitter below 1 ms on recordings where no additional artifacts were added, and below 8 ms for recordings where the signal was severely degraded. Finally, it increases the accuracy of template-based false positive rejection, allowing nearly all mock false positives added to a set of QRS detections to be removed at the cost of a very small decrease in sensitivity. The localization algorithm proposed is particularly well-suited for implementation in embedded, low-power devices for real-time applications.

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“…Wagner was the leader of the STAFF studies, and promoter of the clinical design and the analysis performed [7]). on the data.…”

Section: Contributorsmentioning

confidence: 99%

The STAFF III Database: ECGs Recorded During Acutely Induced Myocardial Ischemia

Martínez

Pahlm

Ringborn

et al. 2017

Computing in Cardiology Conference (CinC)

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Detection and quantification of acute myocardial ischemia by morphologic evaluation of QRS changes by an angle-based method

Cited by 27 publications

References 23 publications

Diagnostic and prognostic values of the V-index, a novel ECG marker quantifying spatial heterogeneity of ventricular repolarization, in patients with symptoms suggestive of non-ST-elevation myocardial infarction

Diagnostic and prognostic values of the V-index, a novel ECG marker quantifying spatial heterogeneity of ventricular repolarization, in patients with symptoms suggestive of non-ST-elevation myocardial infarction

A novel low-complexity post-processing algorithm for precise QRS localization

The STAFF III Database: ECGs Recorded During Acutely Induced Myocardial Ischemia

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