Related Experiment Video

Updated: May 27, 2026

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

Comparison of magnetic resonance imaging findings in non-ST-segment elevation versus ST-segment elevation myocardial

Jianqiang Xu1, Young Bin Song, Joo-Yong Hahn

  • 1Division of Cardiology, Cardiac and Vascular Center, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50, Irwon-dong, Gangnam-gu, Seoul 135-710, Republic of Korea.

The International Journal of Cardiovascular Imaging
|November 11, 2011
PubMed

Insights

Contrast-enhanced MRI reveals non-ST-segment elevation myocardial infarction (NSTEMI) patients have smaller infarct size and less microvascular obstruction than ST-segment elevation myocardial infarction (STEMI) patients. These findings suggest more favorable outcomes for NSTEMI following early invasive intervention.

Area of Science:

  • Cardiovascular Imaging
  • Cardiac MRI
  • Myocardial Infarction Pathophysiology

Background:

  • Differences in clinical outcomes exist between ST-segment elevation myocardial infarction (STEMI) and non-ST-segment elevation myocardial infarction (NSTEMI).
  • Understanding the underlying pathophysiological mechanisms is crucial for targeted treatment strategies.

Purpose of the Study:

  • To compare contrast-enhanced magnetic resonance imaging (CE-MRI) findings between STEMI and NSTEMI patients.
  • To elucidate the in vivo pathophysiological differences contributing to varied clinical outcomes.

Main Methods:

  • CE-MRI was performed in 168 patients (113 STEMI, 55 NSTEMI) a median of 6 days post-event.
  • Infarct size and area at risk (AAR) were quantified using delayed-enhancement and T2-weighted imaging, respectively.
  • Microvascular obstruction and myocardial hemorrhage were also assessed.

Main Results:

  • NSTEMI patients exhibited significantly smaller infarct size (10.7% vs. 19.2%) and lower microvascular obstruction (0% vs. 0.9%) compared to STEMI patients (P < 0.001).
  • A trend towards greater myocardial salvage index was observed in NSTEMI (48.2% vs. 40.5%, P = 0.056), though similar in anterior infarctions.
  • Myocardial hemorrhage was less frequent in NSTEMI (22.6% vs. 43.8%, P = 0.029).

Conclusions:

  • CE-MRI demonstrates more favorable infarct size, AAR, myocardial salvage, and reperfusion injury in NSTEMI compared to STEMI patients undergoing early invasive intervention.
  • Baseline Thrombolysis In Myocardial Infarction flow grade 3 and hemorrhagic infarction are associated with STEMI.
  • These findings highlight distinct in vivo pathophysiological characteristics influencing outcomes in different myocardial infarction types.

More Related Videos

A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia09:59

A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia

Published on: September 16, 2017

Noninvasive Assessment of Cardiac Abnormalities in Experimental Autoimmune Myocarditis by Magnetic Resonance Microscopy Imaging in the Mouse12:24

Noninvasive Assessment of Cardiac Abnormalities in Experimental Autoimmune Myocarditis by Magnetic Resonance Microscopy Imaging in the Mouse

Published on: June 20, 2014

Related Concept Videos

Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
Acute Coronary Syndrome I: Introduction01:30

Acute Coronary Syndrome I: Introduction

Acute Coronary Syndrome (ACS) encompasses a spectrum of heart conditions caused by sudden obstruction of coronary arteries, typically resulting from the rupture of an atherosclerotic plaque and subsequent thrombus (blood clot) formation. This obstruction can lead to partial or complete blockage of blood flow, causing varying degrees of myocardial ischemia or infarction.ACS includes the following clinical entities:Unstable Angina (UA)Non-ST-Elevation Myocardial Infarction (NSTEMI)ST-Elevation...
Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...