A new framework for echocardiographic assessment of left ventricular mechanics: Sensitivity to heart failure

Stewart Denslow, Seshadri Balaji, Kenneth W. Hewett

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

A recent report describes an approach to ventricular mechanics that employs mean end-systolic fiber stress and an exact mathematical strain index based on wall thickness referenced to myocardial mass. We used echocardiography and mean arterial pressures to determine the strain index and wall stress in (1) normal hearts from patients and swine, (2) swine with pacing-induced congestive heart failure, and (3) patients with dilated cardiomyopathy. Pigs were also studied under afterload variation with phenylephrine, Paired values of stress and strain index from control hearts (both swine and human) were tightly clustered. Values from animals and patients with congestive heart failure deviated from this cluster. Excellent separation (sensitivity 83%, specificity 94%) was displayed between control and paced pigs, despite confounding effects of varying afterload. We conclude that these variables display little change over a large range of normal cardiac mass, but deviate from this range during heart failure.

Original languageEnglish (US)
Pages (from-to)969-979
Number of pages11
JournalJournal of the American Society of Echocardiography
Volume13
Issue number11
DOIs
StatePublished - Jan 1 2000

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ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

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