Quantitative assessment of regional peak myocardial acceleration during isovolumic contraction and relaxation times by tissue Doppler imaging

I. Hashimoto, X. K. Li, A. Hejmadi Bhat, M. Jones, David Sahn

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Objective: To examine regional wall acceleration and its relation to relaxation. Study design: 8 sheep were examined by tissue Doppler ultrasound imaging (VingMed Vivid FiVe) in apical four chamber views to evaluate the left ventricular wall divided into six segments and the mitral annulus in two segments. Peak myocardial acceleration during isovolumic periods (pIVA) derived from tissue Doppler echocardiography was analysed during isovolumic contraction (ICT) and relaxation times (IRT) in each segment. Interventions: After scanning at baseline, haemodynamic status was changed by administration of blood, dobutamine, and metoprolol. Changes of pIVA during IRT and ICT were compared over the four haemodynamic conditions in parallel with their peak positive and negative dP/dt measured with a high frequency manometer tipped catheter. Results: pIVA of the basal lateral segment during ICT correlated most strongly with peak positive dP/dt (r = 0.96, p <0.0001) and there was good correlation between pIVA of the mitral valve annulus in the septum during IRT and peak negative dP/dt (r = 0.80, p <0.0001). pIVA differed significantly between the four haemodynamic conditions during ICT in all segments (p <0.05); pIVA during IRT did not differ significantly between the four conditions. Conclusions: pIVA of the basal lateral wall during ICT correlated most strongly with peak positive dP/dt, and pIVA of the septal mitral valve annulus during IRT correlated well with peak negative dP/dt.

Original languageEnglish (US)
Pages (from-to)811-816
Number of pages6
JournalHeart
Volume91
Issue number6
DOIs
StatePublished - Jun 2005

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Hemodynamics
Mitral Valve
Doppler Ultrasonography
Metoprolol
Dobutamine
Doppler Echocardiography
Sheep
Catheters

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

Quantitative assessment of regional peak myocardial acceleration during isovolumic contraction and relaxation times by tissue Doppler imaging. / Hashimoto, I.; Li, X. K.; Bhat, A. Hejmadi; Jones, M.; Sahn, David.

In: Heart, Vol. 91, No. 6, 06.2005, p. 811-816.

Research output: Contribution to journalArticle

Hashimoto, I. ; Li, X. K. ; Bhat, A. Hejmadi ; Jones, M. ; Sahn, David. / Quantitative assessment of regional peak myocardial acceleration during isovolumic contraction and relaxation times by tissue Doppler imaging. In: Heart. 2005 ; Vol. 91, No. 6. pp. 811-816.
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