Novel methodology for echocardiographic quantification of cardiac shape.

Published

Journal Article

BACKGROUND: Left ventricular (LV) shape is a major determinant of cardiac physiology with important prognostic implications. Current techniques are limited in their ability to characterize shape. Regional curvature analysis is a recently developed method that is free of idealized shape assumptions and is applicable globally or regionally. OBJECTIVE: To measure the change in regional curvature from diastole to systole to determine whether modifications of this methodology can be applied to study LV shape noninvasively, and to compare this method with other shape analysis methods. ANIMALS: Seventeen normal dogs underwent transthoracic echocardiography. LV dimensions were measured at end-diastole and end-systole. LV endocardial outlines were traced from apical four-chamber views. LV short to long axis (D/L) ratios and eccentricity index (E) were calculated. Regional curvatures were determined using customized software. Reproducibility of regional curvature was also determined. MAIN RESULTS: LV regional curvature values were consistent among animals at diastole and systole in all areas. Regional curvature showed divergence in different areas. D/L ratios showed a 7% decrease from diastole to systole, whereas E demonstrated a 10% increase. However, regional curvature exhibited a 39% change, suggesting that this methodology is more sensitive. Duplicate curvature values from same or different cardiac cycles were highly reproducible. CONCLUSIONS: Quantitative regional curvature analysis can be applied with echocardiography to study LV shape. This methodology is more sensitive than current methods, is reproducible and may be applicable to the noninvasive study of shape changes in cardiac disease.

Full Text

Duke Authors

Cited Authors

  • Chan, SY; Mancini, GB; Fu, Y; O'Brien, DW; Armstrong, PW

Published Date

  • February 1997

Published In

Volume / Issue

  • 13 / 2

Start / End Page

  • 153 - 159

PubMed ID

  • 9070167

Pubmed Central ID

  • 9070167

International Standard Serial Number (ISSN)

  • 0828-282X

Language

  • eng

Conference Location

  • England