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Novel methodology for echocardiographic quantification of cardiac shape.

Publication ,  Journal Article
Chan, SY; Mancini, GB; Fu, Y; O'Brien, DW; Armstrong, PW
Published in: Can J Cardiol
February 1997

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.

Duke Scholars

Published In

Can J Cardiol

ISSN

0828-282X

Publication Date

February 1997

Volume

13

Issue

2

Start / End Page

153 / 159

Location

England

Related Subject Headings

  • Transducers
  • Stroke Volume
  • Software
  • Signal Processing, Computer-Assisted
  • Reproducibility of Results
  • Myocardial Contraction
  • Microcomputers
  • Male
  • Heart Ventricles
  • Echocardiography
 

Citation

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Chan, S. Y., Mancini, G. B., Fu, Y., O’Brien, D. W., & Armstrong, P. W. (1997). Novel methodology for echocardiographic quantification of cardiac shape. Can J Cardiol, 13(2), 153–159.
Chan, S. Y., G. B. Mancini, Y. Fu, D. W. O’Brien, and P. W. Armstrong. “Novel methodology for echocardiographic quantification of cardiac shape.Can J Cardiol 13, no. 2 (February 1997): 153–59.
Chan SY, Mancini GB, Fu Y, O’Brien DW, Armstrong PW. Novel methodology for echocardiographic quantification of cardiac shape. Can J Cardiol. 1997 Feb;13(2):153–9.
Chan, S. Y., et al. “Novel methodology for echocardiographic quantification of cardiac shape.Can J Cardiol, vol. 13, no. 2, Feb. 1997, pp. 153–59.
Chan SY, Mancini GB, Fu Y, O’Brien DW, Armstrong PW. Novel methodology for echocardiographic quantification of cardiac shape. Can J Cardiol. 1997 Feb;13(2):153–159.
Journal cover image

Published In

Can J Cardiol

ISSN

0828-282X

Publication Date

February 1997

Volume

13

Issue

2

Start / End Page

153 / 159

Location

England

Related Subject Headings

  • Transducers
  • Stroke Volume
  • Software
  • Signal Processing, Computer-Assisted
  • Reproducibility of Results
  • Myocardial Contraction
  • Microcomputers
  • Male
  • Heart Ventricles
  • Echocardiography