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Revista Colombiana de Cardiología

Print version ISSN 0120-5633

Abstract

SALAZAR-MARIN, Santiago; VALENCIA, Johanna Marcela; HERNANDEZ-VASQUEZ, Oscar Mauricio  and  ESTRADA, Jorge Mario. Usefulness of two-dimensional longitudinal peak systolic strain in patients with a clinical diagnosis of acute myocardial infarction without ST elevation. Rev. Colomb. Cardiol. [online]. 2017, vol.24, n.6, pp.550-558. ISSN 0120-5633.  https://doi.org/10.1016/j.rccar.2017.04.011.

Objectives:

To evaluate the usefulness of two-dimensional longitudinal peak systolic strain to detect significant coronary disease in patients with a diagnosis of acute myocardial infarction without ST elevation, and its ability to identify the artery responsible for the coronary event.

Methods:

A descriptive, observational, and cross-sectional study was conducted between March and November 2015 on patients with a clinical diagnosis of acute myocardial infarction without ST elevation, and on whom the two-dimensional longitudinal peak systolic strain of the left ventricle was evaluated prior to coronary angiography.

Results:

The longitudinal strain was evaluated in 28 patients who fulfilled selection criteria. For the ROC curve analysis, a cut-off point of ≥ -18.8% for the overall strain was identified, with a sensitivity of 85% and a specificity of 75% to recognise the presence of angiographically significant coronary disease. A cut-off point of ≥ -17.8% of overall strain identified significant lesions, with a specificity of 100%. For the segmental analysis, a cut-off point of ≥ 3 segments with a strain ≥ -14% was established, finding a sensitivity of 90% and a specificity of 87.5% for the diagnosis of significant coronary disease.

Conclusions:

The evaluated echocardiographic technique, when applied to patients with a clinical diagnosis of myocardial infarction without ST elevation, was shown to be useful in identifying significant coronary disease, but was unable to find the vessel responsible for the acute event.

Keywords : Cardiac imaging techniques; two-dimensional echocardiography; Acute coronary syndrome; Coronary artery diseases with myocardial infarction; Myocardial contraction.

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