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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

Admission ST-segment elevation in lead aVR as the factor improving complex risk stratification in acute coronary

Filip M Szymański1, Marcin Grabowski, Krzysztof J Filipiak

  • 1First Department of Cardiology, The Medical University of Warsaw, 02-097 Warsaw, Poland. f.szymanski@post.pl

The American Journal of Emergency Medicine
|April 16, 2008
PubMed

Insights

ST elevation in lead aVR (aVR(+)) on initial ECG is a strong predictor of 30-day mortality in unstable angina/non-ST-elevation myocardial infarction (UA/NSTEMI) patients. This finding is particularly important for identifying high-risk individuals within low-risk groups.

Area of Science:

  • Cardiology
  • Clinical Medicine
  • Diagnostic Tools

Background:

  • Unstable angina/non-ST-elevation myocardial infarction (UA/NSTEMI) is a critical cardiovascular condition.
  • Accurate prognostic markers are essential for risk stratification and patient management.
  • The prognostic value of ST elevation in lead aVR (aVR(+)) in UA/NSTEMI requires further elucidation.

Purpose of the Study:

  • To analyze the prognostic significance of aVR(+) on admission ECG in UA/NSTEMI patients.
  • To evaluate the combined prognostic value of aVR(+) with clinical variables and TIMI risk score.
  • To determine if aVR(+) provides additional prognostic information in low- and intermediate-risk UA/NSTEMI patients.

Main Methods:

  • Retrospective analysis of admission ECGs in 205 consecutive UA/NSTEMI patients.
  • Evaluation of ST elevation in lead aVR (aVR(+)) > 0.5 mm.
  • Multivariate analysis to assess independent predictors of 30-day mortality.
  • Stratification by clinical factors and Thrombolysis in Myocardial Infarction (TIMI) risk score.

Main Results:

  • Admission aVR(+) was a strong and independent predictor of 30-day mortality in UA/NSTEMI.
  • Mortality significantly increased with the severity of aVR(+).
  • Patients with aVR(+) exhibited higher death rates, even within predefined low-risk clinical groups and TIMI risk score categories.

Conclusions:

  • aVR(+) on admission ECG possesses significant prognostic value in UA/NSTEMI.
  • aVR(+) offers incremental prognostic information beyond conventional risk factors, especially in low- and intermediate-risk patients.
  • Routine assessment of aVR(+) may enhance risk stratification in UA/NSTEMI management.

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