Quantitative Parameters of High-Frame-Rate Strain in Patients with Echocardiographically Normal Function.
Recently, we developed a high-frame-rate echocardiographic imaging system capable of acquiring images at rates up to 2500 per second. High imaging rates were used to quantify longitudinal strain parameters in patients with echocardiographically normal function. These data can serve as a baseline for...
| Publicado en: | Ultrasound in Medicine & Biology Vol. 45; no. 5; pp. 1197 - 1208 |
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| Autores principales: | , , , , , , , , , , |
| Formato: | Journal Article |
| Publicado: |
Elsevier B.V.
May2019
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=136349263&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 136349263 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 03015629 JJ6 jtl: Ultrasound in Medicine & Biology issn: 03015629 maglogo: N pubinfo: dt: May2019 vid: 45 iid: 5 pid: 467 pub: Elsevier B.V. place: New York, New York artinfo: ui: 136349263 136349263 NLM30773380 10.1016/j.ultrasmedbio.2018.11.007 NLM30773380 136349263 ppf: 1197 ppct: 11 formats: tig: atl: Quantitative Parameters of High-Frame-Rate Strain in Patients with Echocardiographically Normal Function. aug: au: Andersen, Martin V. Moore, Cooper Søgaard, Peter Friedman, Daniel Atwater, Brett D. Arges, Kristine LeFevre, Melissa Struijk, Johannes J. Kisslo, Joseph Schmidt, Samuel E. von Ramm, Olaf T. affil: Aalborg University, Aalborg, Denmark sug: subj: Ventricular Function Physiology Image Interpretation, Computer Assisted Methods Echocardiography Methods Heart Ventricle Time Male Female Reference Values Evaluation Research Adult Adult: 19-44 years Male Female ab: Recently, we developed a high-frame-rate echocardiographic imaging system capable of acquiring images at rates up to 2500 per second. High imaging rates were used to quantify longitudinal strain parameters in patients with echocardiographically normal function. These data can serve as a baseline for comparing strain parameters in disease states. The derived timing data also reveal the propagation of mechanical events in the left ventricle throughout the cardiac cycle. High-frame-rate echocardiographic images were acquired from 17 patients in the apical four-chamber view using Duke University's phased array ultrasound system, T5. B-Mode images were acquired at 500-1000 images per second by employing 16:1 or 32:1 parallel processing in receive, a scan depth ≤14 cm and an 80° field of view with a 3.5-MegaHertZ (MHz), 96-element linear array. The images were analyzed using a speckle tracking algorithm tailored for high-frame-rate echocardiographic images developed at Aalborg and Duke University. Four specific mechanical events were defined using strain curves from six regions along the myocardial contour of the left ventricle. The strain curves measure the local deformation events of the myocardium and are independent of the overall cardiac motion. We observed statistically significant differences in the temporal sequence among different myocardial segments for the first mechanical event described, myocardial tissue shortening onset (p < 0.01). We found that the spatial origin of tissue shortening was located near the middle of the interventricular septum in patients with echocardiographically normal function. The quantitative parameters defined here, based on high-speed strain measurements in patients with echocardiographically normal function, can serve as a means of assessing degree of contractile abnormality in the myocardium and enable the identification of contraction propagation. The relative timing pattern among specific events with respect to the Q wave may become an important new metric in assessing cardiac function and may, in turn, improve diagnosis and prognosis. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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