Differences of Ventricular Late Potential between Acute STEMI and NSTEMI Patients
1Department of Cardiology, The First Hospital of China Medical University, Shenyang 110001, China.
The West Indian Medical Journal
|July 12, 2014
Summary
Patients with ST-segment elevation myocardial infarction (STEMI) have a higher positive rate of ventricular late potentials (VLPs) compared to those with non-STEMI. This finding is significant for identifying arrhythmia risk in acute myocardial infarction patients.
Area of Science:
- Cardiology
- Electrophysiology
- Internal Medicine
Background:
- Ventricular late potentials (VLPs) are indicators of myocardial electrical instability.
- Differentiating between acute ST-segment elevation myocardial infarction (STEMI) and non-STEMI is crucial for patient management.
- The prognostic value of VLPs in acute myocardial infarction requires further investigation.
Purpose of the Study:
- To compare the positive rate of ventricular late potentials (VLPs) in patients experiencing acute ST-segment elevation myocardial infarction (STEMI) versus acute non-ST-segment elevation myocardial infarction (NSTEMI).
Main Methods:
- A cohort of 163 acute myocardial infarction patients (90 STEMI, 73 NSTEMI) underwent VLP examination.
- Data collected from patients admitted to the First Hospital of China Medical University between June 2011 and August 2011.
- Statistical analysis, including chi-squared tests, was employed to determine significance.
Main Results:
- The positive VLP rate was significantly higher in the STEMI group (54.4%) compared to the NSTEMI group (38.4%) (p < 0.05).
- Ventricular arrhythmia occurred more frequently in VLP-positive patients (11.7%) than in VLP-negative patients (3.5%) (p < 0.05).
Conclusions:
- The positive rate of VLPs is significantly higher in patients with acute STEMI than in those with acute NSTEMI.
- Elevated VLP positivity is associated with an increased risk of ventricular arrhythmia in acute myocardial infarction patients.
More Related Videos
08:19Transthoracic Echocardiography to Assess Post-Resuscitation Left Ventricular Dysfunction After Acute Myocardial Infarction and Cardiac Arrest in Pigs
Published on: July 12, 2022
3.3K
09:23Confirmation of Myocardial Ischemia and Reperfusion Injury in Mice Using Surface Pad Electrocardiography
Published on: November 24, 2016
13.0K
Related Concept Videos
01:19Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations
919
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...
919
01:30Acute Coronary Syndrome III: Diagnostic Studies
493
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...
493
01:30Acute Coronary Syndrome I: Introduction
2.0K
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...
2.0K
01:30Cardiac Action Potential
11.5K
Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
11.5K
01:27Myocarditis II: Clinical Features and Diagnostic Tests
491
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...
491
01:25ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
1.1K
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...
1.1K