Etanercept (2 mg/kg), a TNFalpha sequestrant, was administered 24 hours and 1 hour before LAD coronary artery ligation to examine the role of TNFalpha on lethal ventricular tachyarrhythmias and myocardial necrosis. Dogs treated with etanercept had decreased very rapid (>360 bpm) ventricular triplets (6 +/- 1/h, n = 8) 2 to 24 hours following coronary artery ligation compared with saline (21 +/- 6/h, n = 10, P < 0.05). This was concordant with 8-fold salvage of beta-adrenergic receptor kinase 1 (betaARK) activity compared with control (33.8 +/- 7.2% versus 4.3 +/- 2.2% of unoperated control tissue, P < 0.01, n = 5). Salvage of betaARK occurred without change in the thickness of the epicardial tissue overlying the infarct. In dogs pretreated with etanercept before a 2-hour occlusion/4-hour reperfusion of the LAD coronary artery, infarct mass decreased by 61% (% area at risk) and 55% (% left ventricular mass) in the etanercept group (n = 8) compared with saline (n = 9, P < 0.05). This was concordant with an etanercept-mediated six-fold decrease in leukocyte accumulation within ischemically injured myocardium. TNFalpha antagonism decreases malignant ventricular tachyarrhythmias and may relate to partial protection of normal betaARK-mediated desensitization of beta-adrenergic receptors. TNFalpha sequestration also decreases infarct size in an occlusion/reperfusion model of myocardial ischemia.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1097/01.fjc.0000151930.12026.b7 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
False Alarms in Wearable Cardioverter Defibrillators-A Relevant Issue or an Insignificant Observation.
J Clin Med
December 2024
Department of Cardiology, Angiology and Intensive Care Medicine, Deutsches Herzzentrum der Charité (DHZC), Campus Virchow-Klinikum, Augustenburger Platz 1, 13353 Berlin, Germany.
The wearable cardioverter defibrillator (WCD) has emerged as a valuable tool used for temporary protection from sudden cardiac death. However, since the WCD uses surface electrodes to detect arrhythmias, it is susceptible to inappropriate detection. Although shock conversion rates for the WCD are reported to be high for detected events, its efficacy in clinical practice tends to be degraded by patient noncompliance.
View Article and Find Full Text PDFActions Taken by Bystanders During Sudden Cardiac Arrest: Analysis of Emergency Medical Service Documentation in Poland.
J Clin Med
December 2024
Department of Integrated Medical Care, Medical University of Bialystok, 15-096 Bialystok, Poland.
: Sudden cardiac arrest (SCA) is a severe medical condition involving the cessation of the heart's mechanical activity. Following the chain of survival, which includes early recognition and calling for help, early initiation of cardiopulmonary resuscitation (CPR), early defibrillation, and post-resuscitation care, offers the greatest chances of saving a person who has experienced SCA. The aim of this study was to analyze cases of out-of-hospital cardiac arrest (OHCA) and assess the actions taken by bystanders.
View Article and Find Full Text PDFAge Variation in Patients with Troponin Level Elevation Without Obstructive Culprit Lesion or Suspected Myocardial Infarction with Non-Obstructive Coronary Arteries-Long-Term Data Covering over Decade.
J Clin Med
December 2024
Institut für Forschung und Lehre (IFL), Department of Molecular and Experimental Cardiology, Ruhr-University Bochum, 44791 Bochum, Germany.
Troponin level elevation without an obstructive culprit lesion is caused by heterogenous entities. The effect of aging on this condition has been poorly investigated. After screening 24,775 patients between 2010 and 2021, this study included a total of 373 patients with elevated troponin levels without an obstructive culprit lesion or suspected myocardial infarction with non-obstructive coronary arteries (MINOCAs) categorized into four age groups containing 78 patients (<51 years), 72 patients (51-60 years), 81 patients (61-70 years), and 142 patients (>70 years).
View Article and Find Full Text PDFSacubitril/Valsartan and Dapagliflozin in Patients with a Failing Systemic Right Ventricle: Effects on the Arrhythmic Burden.
J Clin Med
December 2024
Adult Congenital Heart Disease and Congenital and Familial Arrhythmias Unit, Monaldi Hospital, Leonardo Bianchi Street, 80131 Naples, Italy.
: Angiotensin receptor neprilysin inhibitor (ARNI) and sodium-glucose co-transporter 2 inhibitors (SGLT2i) are essential medications in heart failure (HF) therapy, and their potential antiarrhythmic effects have been reported. Recently, ARNI and SGLT2i use for HF in adult congenital heart disease (ACHD) has been studied. However, whether any beneficial effects may be achieved on the arrhythmic burden in the complex population of ACHD with a systemic right ventricle (sRV) is still to be determined.
View Article and Find Full Text PDFClinical Profile and Management of Wolf-Parkinson White Syndrome and Asymptomatic Pre-Excitation Carriers in Africa: A Multicenter Pan African Registry From 17 Countries.
J Cardiovasc Electrophysiol
January 2025
Douala Gyneco-obstetric and Pediatric Hospital/University of Douala, Douala, Cameroon.
Article Synopsis
- The study explores the management and diagnosis of Wolf-Parkinson White Syndrome (WPW) and asymptomatic pre-excitation in Africa, highlighting a lack of data in the region.
- Conducted in 20 centers across 17 African countries, the research involved 541 participants and focused on symptomatology, treatment approaches, and the impact of local health dynamics on care.
- Results indicated that a vast majority were diagnosed with WPW, with significant regional differences in treatment options and effectiveness, showing that Northern and Southern Africa have more advanced practices compared to other areas.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!