Cyclic variation of integrated backscatter: Dependence of time delay on the echocardiographic view used and the myocardial segment analyzed

Ann E. Finch-Johnston, Hiie M. Gussak, Joel Mobley, Mark R. Holland, Olivera Petrovic, Julio E. Pérez, James G. Miller

Research output: Contribution to journalArticle

52 Scopus citations

Abstract

To determine the influence of myocardial anisotropy in ultrasonic tissue characterization, we measured the time delay (and magnitude) of the cyclic variation of myocardial integrated backscatter from specific segments visualized in the 4 standard transthoracic echocardiographic views. The cyclic variation data in 10 myocardial regions were obtained from analyses of 2-dimensional integrated backscatter images from 23 healthy subjects. Resultant values (mean ± SD) for the time delay were as follows: parasternal long-axis view: 1.08 ± 0.17 (septum) and 1.00 ± 0.14 (posterior wall); parasternal short-axis view: 1.03 ± 0.16 (anterior septum), 1.03 ± 0.14 (posterior wall), 2.22 ± 0.71 (lateral wall), and 1.65 ± 0.66 (posterior septum); apical 4-chamber view: 1.08 ± 0.31 (septum) and 2.20 ± 0.79 (lateral wall); and apical 2-chamber view: 1.68 ± 0.62 (inferior wall) and 2.04 ± 0.72 (anterior wall). Hence, results of this study indicate that myocardial ultrasonic characterization that uses the cyclic variation is influenced by the echocardiographic view and the specific segment of the left ventricle.

Original languageEnglish
Pages (from-to)9-17
Number of pages9
JournalJournal of the American Society of Echocardiography
Volume13
Issue number1
DOIs
StatePublished - Jan 2000

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