Related Experiment Video

Updated: Oct 21, 2025

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

24.4K

The effect of the localisation of an underlying ST-elevation myocardial infarction on the VF-waveform: A multi-centre

J Nas1, L H van Dongen2, J Thannhauser1

  • 1Department of Cardiology, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6525 GA Nijmegen, the Netherlands.

Resuscitation
|September 9, 2021
PubMed

Insights

Amplitude spectrum area (AMSA) during ventricular fibrillation (VF) is lower in out-of-hospital cardiac arrest (OHCA) patients with ST-elevation myocardial infarction (STEMI). This VF waveform characteristic is most pronounced with inferior STEMI, suggesting potential for earlier STEMI diagnosis.

Area of Science:

  • Cardiology
  • Medical Technology
  • Emergency Medicine

Background:

  • Ventricular fibrillation (VF) waveform characteristics, like amplitude spectrum area (AMSA), are investigated for identifying underlying myocardial infarction (MI) during cardiac arrest.
  • Previous studies indicate lower AMSA values in patients with MI, with waveform characteristics varying based on MI location relative to ECG recording direction.

Purpose of the Study:

  • To investigate the association between AMSA values derived from defibrillator recordings and the presence and localization of ST-elevation myocardial infarction (STEMI) in out-of-hospital cardiac arrest (OHCA) patients.

Main Methods:

  • A multi-center cohort study involving 754 OHCA patients.
  • AMSA was calculated from defibrillator pad-ECG recordings.
  • STEMI localization was determined through ECG, angiography, or autopsy.

Main Results:

  • Statistically significant differences in AMSA values were observed across no STEMI, anterior STEMI, and inferior STEMI groups in both study cohorts.
  • Univariate analysis revealed significantly lower AMSA in inferior STEMI compared to no STEMI.
  • Adjusted analyses showed numerically lowest AMSA for inferior STEMI, with a greater relative difference compared to anterior STEMI.

Conclusions:

  • This OHCA study demonstrates significantly lower AMSA in the presence of underlying STEMI, particularly for inferior STEMI.
  • Further research is warranted to confirm the impact of STEMI localization on VF waveforms for potential earlier diagnosis during VF.
Abstract

Keywords:
Out-of-hospital cardiac arrestST-elevation myocardial infarctionVentricular fibrillationWaveform analysis

More Related Videos

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction06:57

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

Published on: January 31, 2019

15.0K
Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System10:17

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

Published on: April 11, 2025

1.1K

Related Concept Videos

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...
47
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...
134
Electrocardiogram01:29

Electrocardiogram

An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
4.0K
Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations01:19

Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations

The pathophysiology of Acute Coronary Syndrome [ACD] involves several key processes:The main underlying cause of ACD is atherosclerosis, a chronic inflammatory disease characterized by the buildup of lipid-laden plaques within the coronary arteries.As the atherosclerotic plaque grows in the coronary artery, it may become unstable due to the formation of a lipid-rich core and a thin fibrous cap. Inflammatory cells within the plaque, such as macrophages, secrete enzymes that degrade the...
84
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias

Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
204