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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

Characteristics and outcomes in patients with acute myocardial infarction with ST-segment depression on initial

N G Mahon1, M B Codd, C J McKenna

  • 1Department of Clinical Cardiology, Epidemiology, and Biostatistics, Mater Misericordiae Hospital, Dublin, Ireland. nmahon@sghms.ac.uk

American Heart Journal
|January 29, 2000
PubMed

Insights

Patients with acute myocardial infarction (AMI) showing ST-segment depression have a poorer prognosis. This significant minority (11%) are older, have more comorbidities, and higher mortality rates.

Area of Science:

  • Cardiology
  • Internal Medicine
  • Emergency Medicine

Background:

  • Acute myocardial infarction (AMI) with nonreciprocal ST-segment depression presents diagnostic and treatment challenges.
  • This presentation is associated with a poorer prognosis, necessitating further investigation.

Purpose of the Study:

  • To determine the proportion of AMI patients with nonreciprocal ST-segment depression.
  • To characterize these patients regarding clinical features, treatment, and prognosis.

Main Methods:

  • Analysis of electrocardiographic data from 852 consecutive AMI admissions.
  • Characterization of patient demographics, clinical presentation, treatment received, and outcomes.

Main Results:

  • Nonreciprocal ST-depression occurred in 11% of AMI patients, often with ST depression >3 mm.
  • These patients were older, had higher rates of prior myocardial infarction, left ventricular failure, cardiogenic shock, and atrial fibrillation.
  • Hospital mortality (31% vs 17%) and long-term mortality (56% vs 32%) were significantly higher.
  • Fewer patients received thrombolysis, angiography, or percutaneous revascularization.
  • Previous myocardial infarction independently predicted ST-segment depression.

Conclusions:

  • Patients with AMI and ST-segment depression constitute a significant minority with a poor prognosis.
  • They are typically older, have a high prevalence of prior myocardial infarction and multivessel disease.
  • This subgroup requires specific attention for improved management strategies.
Abstract

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