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The International Journal of Cardiovascular Imaging

Erschienen in:

05.06.2019 | Original Paper

Mechanical dispersion as a marker of left ventricular dysfunction and prognosis in stable coronary artery disease

verfasst von: Brede Kvisvik, Erika Nerdrum Aagaard, Lars Mørkrid, Helge Røsjø, Magnus Lyngbakken, Marit Kristine Smedsrud, Christian Eek, Bjørn Bendz, Kristina H. Haugaa, Thor Edvardsen, Jørgen Gravning

Erschienen in: The International Journal of Cardiovascular Imaging | Ausgabe 7/2019

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Abstract

Assessment of global longitudinal strain (GLS) is superior to ejection fraction (EF) in the evaluation of left ventricular (LV) function in patients with stable coronary artery disease (CAD). However, the role of mechanical dispersion (MD) in this context remains unresolved. We aimed to evaluate the potential role of MD as a marker of LV dysfunction and long-term prognosis in stable CAD. EF, GLS and MD were assessed in 160 patients with stable CAD, 1 year after successful coronary revascularization. Serum levels of high-sensitivity cardiac troponin I (hs-cTnI) and amino-terminal pro B-type natriuretic peptide (NT-proBNP) were quantified as surrogate markers of LV dysfunction. The primary endpoint was defined as all-cause mortality, the secondary endpoint was defined as the composite of all-cause mortality and hospitalization for acute myocardial infarction or heart failure during follow-up. Whereas no associations between EF and the biochemical markers of LV function were found, both GLS and MD correlated positively with increasing levels of hs-cTnI (R = 0.315, P < 0.001 and R = 0.442, P < 0.001, respectively) and NT-proBNP (R = 0.195, P = 0.016 and R = 0.390, P < 0.001, respectively). Median MD was 46 ms (interquartile range [IQR] 37–53) and was successfully quantified in 96% of the patients. During a median follow-up of 8.4 (IQR 8.2–8.8) years, 14 deaths and 29 secondary events occurred. MD was significantly increased in non-survivors, and provided incremental prognostic value when added to EF and GLS. NT-proBNP was superior to the echocardiographic markers in predicting adverse outcomes. MD may be a promising marker of LV dysfunction and adverse prognosis in stable CAD.

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Titel: Mechanical dispersion as a marker of left ventricular dysfunction and prognosis in stable coronary artery disease
verfasst von: Brede Kvisvik
Erika Nerdrum Aagaard
Lars Mørkrid
Helge Røsjø
Magnus Lyngbakken
Marit Kristine Smedsrud
Christian Eek
Bjørn Bendz
Kristina H. Haugaa
Thor Edvardsen
Jørgen Gravning
Publikationsdatum: 05.06.2019
Verlag: Springer Netherlands
Erschienen in: The International Journal of Cardiovascular Imaging / Ausgabe 7/2019
Print ISSN: 1569-5794
Elektronische ISSN: 1875-8312
DOI: https://doi.org/10.1007/s10554-019-01583-z

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