Two-dimensional speckle tracking for the assessment of coronary artery disease during dobutamine stress echo: clinical tool or merely research method

Constantina Aggeli, Stauroula Lagoudakou, Ioannis Felekos, Vasiliki Panagopoulou, Stellios Kastellanos, Konstantinos Toutouzas, George Roussakis, Dimitris Tousoulis, Constantina Aggeli, Stauroula Lagoudakou, Ioannis Felekos, Vasiliki Panagopoulou, Stellios Kastellanos, Konstantinos Toutouzas, George Roussakis, Dimitris Tousoulis

Abstract

Background: Two-dimensional speckle tracking provides valuable information for regional wall motion abnormalities. The purpose of this study was to determine the diagnostic value of left ventricular longitudinal strain and torsion to diagnose coronary artery disease during dobutamine stress echocardiography.

Methods: We studied 100 patients (mean age 60.8 ± 10.7 years, 72 male) with known or suspected coronary artery disease, excluding those with prior history of transmural infraction. All of them underwent dobutamine stress echo and coronary angiography within one month. Wall-motion score index, left ventricular global longitudinal strain and torsion were measured at rest and peak stress. Additionally, the respective differences between rest and stress were also calculated. Optimal cut-offs were derived from receiver operating characteristic curves for strain and torsion values.

Results: Mean left ventricular ejection fraction was 55 ± 5.4 %. Coronary angiography revealed significant lesions in 67 patients. Values regarding sensitivity, and specificity for wall motion score index difference were 78 % and 88 % respectively (area under curve 0.84). Global longitudinal strain difference (median 0.5 %) illustrated 81 % sensitivity and 72 % specificity for disease detection (area under curve 0.80, cut-off value ≤0 %). The respective values for torsion difference (median 4.7°) were 81 % and 82 % (area under curve 0.76, cut-off value ≤6.5°). Combination of wall motion score index difference and torsion difference for disease detection showed 91 % sensitivity and 79 % specificity (area under curve 0.85).

Conclusions: The implementation of speckle tracking during dobutamine stress echo could serve as an adjunct method for coronary artery disease assessment, providing quantitative diagnostic information.

Figures

Fig. 1
Fig. 1
A patient with LAD disease (a) and a normal patient (b) are illustrated (apical 4-chamber view and bull’s-eye) at peak stress
Fig. 2
Fig. 2
Torsion curves, along with apical and base rotations are depicted at rest and peak stress in a normal patient and a patient with CAD
Fig. 3
Fig. 3
Roc Curves regarding (a) wall-motion score index delta (WMSId), (b) Global Longitudinal strain (GLS) delta and Torsion delta, (c) Global Longitudinal strain delta for LAD and (d) posterior circulation disease and (e) Torsion delta for anterior and (f) posterior circulation disease

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Source: PubMed

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