This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Request Permissions Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Olshansky, B. Articles by Prasad, N. V. Search for Related Content PubMed PubMed Citation Articles by Olshansky, B. Articles by Prasad, N. V.

Circulation, Vol 70, 972-977, Copyright © 1984 by American Heart Association

ARTICLES

Variation of left ventricular myocardial gray level on two-dimensional echocardiograms as a result of cardiac contraction

B Olshansky, SM Collins, DJ Skorton and NV Prasad

Integrated ultrasonic backscatter from normal myocardium has been shown to vary with the phase of cardiac contraction (decreasing from end- diastole to end-systole) in previous studies of open-chest dogs. If confirmed, this finding would have important implications for clinical application of ultrasonic tissue characterization. Our hypothesis was that a cardiac cycle-dependent variation in regional average gray level would be detected on analysis of digitized two-dimensional echocardiograms. We analyzed echocardiographic images from 16 subjects in whom normal, technically good studies were obtained with a commercial phased-array scanner and a 2.25 MHz transducer. Images from six subjects were digitized from stop-frame photographs and those from 10 subjects were obtained directly in digital format from the scanner. Average gray level was measured in a portion of the left ventricular posterior wall in parasternal long-axis images obtained at end-diastole and end-systole by both photographic and digital-image acquisition. In seven of the subjects from whom digital images were acquired, left ventricular posterior wall gray level and ventricular septal gray level were also evaluated on parasternal short-axis images. In images digitized by the photographic technique, mean posterior wall gray level decreased significantly from end-diastole (175 +/- 5.8 SEM) to end- systole (167 +/- 5.1, p less than .05). Similarly, in images digitized directly, mean posterior wall gray level in the long-axis view decreased from end-diastole (71 +/- 3.4) to end-systole (59 +/- 2.5, p less than .005).(ABSTRACT TRUNCATED AT 250 WORDS)

This article has been cited by other articles:

				S. Golemati, T. J. Tegos, A. Sassano, K. S. Nikita, and A. N. Nicolaides Echogenicity of B-mode Sonographic Images of the Carotid Artery: Work in Progress J. Ultrasound Med., May 1, 2004; 23(5): 659 - 669. [Abstract] [Full Text] [PDF]

				B. Dagdeviren, O. Akdemir, M. Eren, O. Bolca, E. Oguz, Y. Gurlertop, and T. Tezel Prognostic implication of myocardial texture analysis in idiopathic dilated cardiomyopathy Eur J Heart Fail, January 1, 2002; 4(1): 41 - 48. [Abstract] [Full Text] [PDF]

				S. Nozaki, A. N. DeMaria, G. A. Helmer, and H. K. Hammond Detection of Regional Left Ventricular Dysfunction in Early Pacing-Induced Heart Failure Using Ultrasonic Integrated Backscatter Circulation, November 1, 1995; 92(9): 2676 - 2682. [Abstract] [Full Text]

				A. D. Waggoner, B. Barzilai, J. G. Miller, and J. E. Perez Quantitative Echocardiography, Part 1: Myocardial Tissue Characterization with Analysis of Radiofrequency Signas Journal of Diagnostic Medical Sonography, May 1, 1993; 9(3): 122 - 134. [Abstract] [PDF]