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

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A groundbreaking electrocardiographic observation: "Isoelectric horizontal ST-segment with sharp ST-T angle" a novel

Maitri M Patel1, Sumantkumar G Patel2, Jigar K Patel2

  • 1GCS Medical College and Research Centre, Ahmedabad, India.

Indian Heart Journal
|October 13, 2024
PubMed

Insights

The isoelectric horizontal ST-segment with sharp ST-T-angle (IHST) sign improves acute coronary syndrome (ACS) detection. IHST shows higher sensitivity than T-inversion and specificity than ST-depression in identifying ACS cases.

Area of Science:

  • Cardiology
  • Medical Diagnostics

Background:

  • Acute coronary syndrome (ACS) diagnosis relies on electrocardiogram (ECG) findings.
  • ST-depression and T-inversion are common ECG markers for ACS.
  • A subset of ACS cases may not present with these typical findings.

Purpose of the Study:

  • To evaluate the diagnostic utility of the isoelectric horizontal ST-segment with sharp ST-T-angle (IHST) sign in suspected ACS cases.
  • To compare the sensitivity and specificity of IHST with traditional ECG markers (ST-depression, T-inversion).

Main Methods:

  • Consecutive suspected ACS patients were classified into ST-depression, T-inversion, and remaining groups.
  • The remaining group was further subclassified based on the presence or absence of the IHST sign.
  • Serial high-sensitive Troponin-I testing was performed for all patients.

Main Results:

  • ACS incidence was 77.96%.
  • The IHST sign was present in 15.04% of ACS patients.
  • IHST demonstrated higher sensitivity than T-inversion and greater specificity than ST-depression for ACS detection.
  • The presence of IHST was statistically significant in Group-3 (p=0.008) and overall ACS cases (p=0.048).

Conclusions:

  • The IHST sign is a valuable additional marker for diagnosing ACS, particularly in cases without typical ST-depression or T-inversion.
  • Incorporating the IHST sign into ECG interpretation can improve the detection rate of acute coronary syndrome.

Keywords:
Acute coronary syndromeDr Patels' IHST ECG SignElectrocardiogramIsoelectric horizontal ST segment with sharp ST-T angle

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