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A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
18:11

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis

Published on: December 28, 2012

[Ischemic heart disease in women: prognostic value of ventricular repolarization variables]

Zita Bertasiene1, Julija Brazdzionyte, Remigijus Zaliūnas

  • 1Clinic of Cardiology, Kaunas University of Medicine Hospital, Eiveniu 2, 3007 Kaunas, Lithuania. mbertas@takas.lt

Medicina (Kaunas, Lithuania)
|February 7, 2004
PubMed

Insights

Ventricular repolarization variables during exercise tests can predict coronary artery disease in women. JT dispersion and ST-JT product are key indicators for identifying significant coronary artery stenoses and multi-vessel disease.

Area of Science:

  • Cardiology
  • Diagnostic Imaging
  • Exercise Physiology

Background:

  • Coronary heart disease (CHD) diagnosis in women often relies on invasive procedures.
  • Noninvasive methods for detecting significant coronary artery stenoses are crucial for early diagnosis and management.

Purpose of the Study:

  • To evaluate changes in ventricular repolarization variables during exercise tests in women with CHD.
  • To identify repolarization variables that best predict significant coronary artery stenoses.
  • To enhance noninvasive diagnostics for CHD in women.

Main Methods:

  • Ninety women with unstable angina pectoris underwent coronary angiography and exercise testing.
  • Ventricular repolarization variables including JT interval, JT dispersion, and ST-JT product were analyzed.
  • Predictive values of different variables for significant coronary artery stenoses were compared.

Main Results:

  • No significant differences in repolarization variables were found between women without stenoses and those with one or two stenoses.
  • ST-JT product showed higher diagnostic value (67%) than ST depression >0.1 mV (52%) for detecting stenoses.
  • JT dispersion >33 ms at peak exercise had the best diagnostic value (77%) for predicting three-vessel disease.
  • Previous myocardial infarction (MI) and elevated ST-JT product also significantly increased the odds of three-vessel disease.

Conclusions:

  • Ventricular repolarization variables, particularly JT dispersion and ST-JT product during exercise, are valuable noninvasive markers for diagnosing significant coronary artery stenoses in women.
  • These findings can improve the noninvasive diagnostic accuracy of CHD in women, potentially reducing the need for invasive procedures.

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