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Tissue Doppler echocardiographic identification of ischemic etiology in patients with dilated cardiomyopathy

Michał Plewka1, Maria Krzemińska-Pakuła, Jarosław Drozdz

  • 1II Chair and Department of Cardiology, Medical University of Lodz, Bieganski Hospital, Kniaziewicza 115, 9A-347 Lodz, Poland. plewka@ptkardio.pl

Scandinavian Cardiovascular Journal : SCJ
|December 15, 2005
PubMed

Insights

Tissue Doppler echocardiography (TDE) can differentiate between ischemic and nonischemic cardiomyopathy. The dispersion index of systolic velocities is significantly higher in ischemic cardiomyopathy patients, aiding diagnosis.

Area of Science:

  • Cardiology
  • Echocardiography
  • Cardiomyopathy Research

Background:

  • Left ventricular dysfunction is a hallmark of cardiomyopathy.
  • Distinguishing between ischemic and nonischemic etiologies is crucial for appropriate treatment.

Purpose of the Study:

  • To compare left ventricular function in patients with ischemic and nonischemic cardiomyopathy.
  • To evaluate the utility of tissue Doppler echocardiography (TDE) in differentiating these conditions.

Main Methods:

  • Studied 30 patients post-myocardial infarction (MI group), 30 with dilated cardiomyopathy (DCM group), and 60 controls.
  • Measured TDE velocities and cardiac cycle time intervals.
  • Calculated the dispersion index of TDE parameters.

Main Results:

  • Early diastolic velocities were lower in the MI group compared to the DCM group.
  • The dispersion index of systolic velocities was significantly higher in the MI group than in the DCM group and controls (33.1+/-6.0% vs 12.6+/-3.7% vs 15.9+/-5.6%, p < 0.001).
  • Preejection period was shorter, and isovolumic relaxation and diastasis times were longer in the MI group versus the DCM group.

Conclusions:

  • TDE parameters, including early diastolic velocity and the dispersion index of systolic velocities, effectively differentiate between ischemic and nonischemic dilated cardiomyopathy.
  • Specific TDE parameters can distinguish the etiology of cardiomyopathy, guiding clinical management.
Abstract

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