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Related Experiment Videos

Sequential biventricular resynchronization optimized by myocardial strain rate analysis: a case report.

Fabio Capasso1, Anna Giunta, Gabriella Grimaldi

  • 1Cardiology Unit, Casa di Cura San Michele, Maddaloni (CE), Italy. fabiocapasso@aliceposta.it

Italian Heart Journal : Official Journal of the Italian Federation of Cardiology
|December 1, 2004
PubMed
Summary
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Optimizing cardiac resynchronization therapy (CRT) using tissue Doppler imaging improved patient outcomes. Sequential CRT (S-CRT) with tailored interventricular delay led to reverse cardiac remodeling and enhanced systolic function.

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Imaging

Background:

  • Severe left ventricular systolic dysfunction and left bundle branch block often necessitate advanced therapies.
  • Cardiac resynchronization therapy (CRT) is a key treatment, but optimization remains challenging.

Observation:

  • A novel asynchrony index was derived from tissue Doppler longitudinal strain rate profiles.
  • This index quantified mechanical asynchrony by measuring timing differences in regional wall shortening.

Findings:

  • Sequential CRT (S-CRT) was optimized by modulating interventricular delay to minimize the asynchrony index.
  • A 20 ms left ventricular pre-excitation was programmed, leading to acute systolic improvement and reverse remodeling over 12 months.

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Implications:

  • Tissue Doppler-derived strain rate analysis enables precise modulation of interventricular delay for tailored CRT.
  • Optimized S-CRT may offer superior clinical benefits and reverse remodeling compared to conventional CRT in select patients.