Background: Regional myocardial sympathetic denervation is a conspicuous and early disorder in patients with chronic Chagas' cardiomyopathy (CCC), potentially associated to the progression of myocardial dysfunction OBJECTIVE: To evaluate in a longitudinal study the association between the presence and the progression of regional myocardial sympathetic denervation with the deterioration of global and segmental left ventricular dysfunction in CCC.
Methods: 18 patients with CCC were submitted at initial evaluation and after 5.5 years to rest myocardial scintigraphy with Iodo-metaiodobenzylguanidine and Tc-sestamibi and to two-dimensional echocardiography to assess myocardial sympathetic denervation, extent of fibrosis, and the left ventricular ejection fraction (LVEF) and wall motion abnormalities.
Results: In the follow-up evaluation, compared to the initial one, we observed a significant decrease in LVEF (56 ± 11 to 49% ± 12; P = .01) and increased summed defects scores in the myocardial innervation scintigraphy (15 ± 10 to 20 ± 9; P < .01). The presence of regional myocardial sympathetic denervation in ventricular regions of viable non-fibrotic myocardium presented an odds ratio of 4.25 for the development of new wall motion abnormalities (P = .001).
Conclusion: Regional and global myocardial sympathetic denervation is a progressive derangement in CCC. In addition, the regional denervation is topographically associated with areas of future development of regional systolic dysfunction in patients with CCC.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s12350-021-02869-3 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Left superior cervical ganglia lymph node mimicry and its role in rat ventricular arrhythmias following myocardial infarction.
Acta Physiol (Oxf)
February 2025
Department of Cardiology, Cheeloo College of Medicine, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China.
Aim: Sympathetic overactivation may lead to severe ventricular arrhythmias (VAs) post-myocardial infarction (MI). The superior cervical ganglion (SCG) is an extracardiac sympathetic ganglion which regulates cardiac autonomic tone. We aimed to investigate the characteristics and functional significance of SCG on neuro-cardiac communication post-MI.
View Article and Find Full Text PDFRopivacaine and celecoxib-loaded injectable composite hydrogel for improved chronic pain-exacerbated myocardial ischemia-reperfusion injury.
J Control Release
January 2025
Department of Joint and Orthopedics, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China. Electronic address:
Chronic pain is a prevalent condition affecting a significant portion of the global population and is known to be associated with an increased risk of cardiovascular diseases. Despite the clinical relevance, the mechanisms underlying the link between chronic pain and myocardial ischemia-reperfusion (MI/R) injury remain poorly understood. This study aimed to investigate the role of the superior cervical ganglion (SCG) in mediating the effects of chronic pain on MI/R injury and to develop a novel therapeutic strategy.
View Article and Find Full Text PDFLethal Arrhythmogenic Role of Left Ventricular Myocardial Interstitial Fibrosis in Apolipoprotein E/Low-Density Lipoprotein Receptor Double-Knockout Mice with Metabolic Dysfunction-Associated Steatohepatitis.
Int J Mol Sci
December 2024
Life Science Division, Yamaguchi University Advanced Technology Institute, Ube 755-8505, Japan.
The combination of alcohol and a low-carbohydrate, high-protein, high-fat atherogenic diet (AD) increases the risk of lethal arrhythmias in apolipoprotein E/low-density lipoprotein receptor double-knockout (AL) mice with metabolic dysfunction-associated steatotic liver disease (MASLD). This study investigates whether left ventricular (LV) myocardial interstitial fibrosis (MIF), formed during the progression of metabolic dysfunction-associated steatohepatitis (MASH), contributes to this increased risk. Male AL mice were fed an AD with or without ethanol for 16 weeks, while age-matched AL and wild-type mice served as controls.
View Article and Find Full Text PDF[Cardiac β-adrenergic receptor regulation of mitochondrial function in heart failure].
Sheng Li Xue Bao
December 2024
Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University; Institute of Advanced Clinical Medicine, Peking University; NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides; Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China.
Heart failure is characterized by abnormal β-adrenergic receptor (β-AR) activation and mitochondrial dysfunction. In heart failure, overactivation of β-AR mediates key pathological processes in cardiomyocytes, including oxidative stress, calcium overload and metabolic abnormalities, which subsequently lead to inflammation, myocardial apoptosis and necrosis. Mitochondria are the core organelles for energy metabolism, and also play a vital role in calcium homeostasis, redox balance and signaling transduction.
View Article and Find Full Text PDFThe role of the dorsomedial hypothalamus in the cardiogenic sympathetic reflex in the Sprague Dawley rat.
Front Physiol
December 2024
Biomedical Science Department, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States.
Myocardial ischemia causes the production and release of metabolites such as bradykinin, which stimulates cardiac spinal sensory afferents, causing chest pain and an increase in sympathetic activity referred to as the cardiogenic sympathetic afferent reflex. While the brain stem nuclei, such as the nucleus tractus solitarius and rostral ventrolateral medulla, are essential in the cardiogenic sympathetic afferent reflex, the role of other supramedullary nuclei in the cardiogenic sympathetic afferent reflex are not clear. The dorsomedial hypothalamic nucleus (DMH) is involved in cardiovascular sympathetic regulation and plays an important role in the sympathetic response to stressful stimuli.
View Article and Find Full Text PDFWant 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!