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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

[Exercise-induced myocardial ischemia in patients with coronary artery ectasia without significant coronary stenosis]

Wen-hui Huang1, Jian-fang Luo, Ying-ling Zhou

  • 1Guangdong Provincial Cardiovascular Institute, Guangzhou 510100, China.

Di 1 Jun Yi Da Xue Xue Bao = Academic Journal of the First Medical College of PLA
|July 20, 2005
PubMed

Insights

Patients with coronary artery ectasia (CAE) may experience angina during exercise. Treadmill tests showed that exercise can induce myocardial ischemia in individuals with CAE, even without significant coronary stenosis.

Area of Science:

  • Cardiology
  • Exercise Physiology

Background:

  • Coronary artery ectasia (CAE) is characterized by abnormal dilations in coronary arteries.
  • Significant coronary stenosis is typically associated with myocardial ischemia.
  • The effect of exercise on myocardial perfusion in CAE without stenosis is not well understood.

Purpose of the Study:

  • To determine if exercise can induce myocardial ischemia in patients with CAE but no significant coronary stenosis.
  • To assess the incidence of angina and positive exercise stress tests in this patient group.

Main Methods:

  • A study group of 41 patients with CAE (without significant stenosis) underwent treadmill exercise testing and coronary angiography.
  • A control group of 41 individuals with normal coronary arteries was included for comparison.
  • Clinical examination and selective coronary angiography were performed on all participants.

Main Results:

  • 18 patients (43.9%) with CAE reported typical angina during exercise, compared to 2 in the control group (P=0.001).
  • 32 patients (78%) in the CAE group had a positive treadmill test, versus 5 in the control group (P<0.0001).

Conclusions:

  • Patients with CAE and without significant coronary stenosis can develop exercise-induced myocardial ischemia.
  • Typical angina symptoms can occur in these patients, highlighting the need for careful evaluation during exercise stress testing.
Abstract

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