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High-frequency High-resolution Echocardiography: First Evidence on Non-invasive Repeated Measure of Myocardial Strain, Contractility, and Mitral Regurgitation in the Ischemia-reperfused Murine Heart
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High-frequency High-resolution Echocardiography: First Evidence on Non-invasive Repeated Measure of Myocardial Strain, Contractility, and Mitral Regurgitation in the Ischemia-reperfused Murine Heart

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Stress Doppler echocardiography using dobutamine in coronary patients with and without ischaemia induction

P K Mazeika1, A Nadazdin, C M Oakley

  • 1Department of Medicine, Hammersmith Hospital and RPMS, London, U.K.

European Heart Journal
|August 1, 1992
PubMed

Insights

Dobutamine stress echocardiography can reveal abnormal heart wall motion in patients with coronary artery disease (CAD). This method helps evaluate left ventricular ejection dynamics and detect inducible ischemia.

Area of Science:

  • Cardiology
  • Diagnostic Imaging
  • Physiology

Background:

  • Coronary artery disease (CAD) diagnosis often relies on invasive procedures.
  • Non-invasive methods for evaluating cardiac function under stress are crucial.

Purpose of the Study:

  • To assess the impact of dobutamine on left ventricular ejection dynamics.
  • To determine the utility of dobutamine stress echocardiography in diagnosing CAD.

Main Methods:

  • Studied 34 patients (10 normal, 24 with significant CAD) using graded dobutamine infusion (5-20 µg/kg/min).
  • Utilized two-dimensional echocardiography and an 11-segment model to detect regional asynergy.
  • Categorized CAD patients based on inducible ischemia and reversible wall motion abnormalities.

Main Results:

  • Hyperkinetic wall motion was observed in normal and CAD patients, with exaggerated hyperkinesis in segments with baseline or reversible asynergy.
  • No significant differences in heart rate and blood pressure changes between normal and CAD groups.
  • Dobutamine stress echocardiography identified regional asynergy indicative of CAD.

Conclusions:

  • Dobutamine stress echocardiography is valuable for evaluating left ventricular ejection dynamics in CAD.
  • The study demonstrated characteristic hyperkinetic wall motion patterns in response to dobutamine in CAD patients.
  • This non-invasive technique aids in detecting inducible ischemia and assessing CAD severity.

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