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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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Association Between Preinfarction Angina and Angiographic Findings in Non-ST-Segment Elevation Myocardial Infarction

Naoki Misumida1, Akihiro Kobayashi1, Madeeha Saeed2

  • 1Department of Internal Medicine, Mount Sinai Beth Israel, New York, New York.

Clinical Cardiology
|September 30, 2015
PubMed

Insights

Preinfarction angina in non-ST-segment elevation myocardial infarction (NSTEMI) patients is linked to smaller infarct size and improved artery patency. Patients without this angina symptom face a higher risk of developing large myocardial infarctions (MI).

Area of Science:

  • Cardiology
  • Clinical Medicine
  • Medical Research

Background:

  • The relationship between preinfarction angina and angiographic outcomes in non-ST-segment elevation myocardial infarction (NSTEMI) is not well understood.
  • Investigating this association can provide insights into NSTEMI pathophysiology and patient risk stratification.

Purpose of the Study:

  • To determine if preinfarction angina is associated with favorable angiographic findings in patients with NSTEMI.
  • To explore the impact of preinfarction angina on infarct size and infarct-related artery (IRA) patency.

Main Methods:

  • Retrospective analysis of 481 NSTEMI patients undergoing coronary angiography.
  • Preinfarction angina defined as chest pain within 7 days of admission.
  • Infarct size assessed by peak cardiac troponin I (cTnI); large MI defined by cTnI >85th percentile; IRA patency by TIMI grade 2-3 flow.

Main Results:

  • 42% of patients experienced preinfarction angina.
  • Preinfarction angina was associated with smaller infarct size (lower peak cTnI, lower incidence of large MI) and IRA patency.
  • Preinfarction angina and IRA patency were independent negative predictors of large MI on multivariate analysis.

Conclusions:

  • Preinfarction angina predicts smaller infarct size and IRA patency in NSTEMI patients.
  • NSTEMI patients without preinfarction angina are at increased risk of large myocardial infarction.
  • Findings may aid in identifying high-risk NSTEMI patients needing closer monitoring or intervention.
Abstract

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