Molecular evidence of tissue remodeling in an animal model of heart failure.

This study analyzed heart tissue remodeling in an animal model of HF induced by aortocaval fistula (ACF) and submitted to LA treatment. After 4 weeks of ACF, animals were treated with LA for 4 weeks (SHAM-LA, HF-LA) or for 8-12 weeks with saline (SHAM, HF8, HF12). Rats were euthanized and the hearts removed for histological processing. The samples were stained with Hematoxylin-Eosin (HE), Masson's Thichome (MT), or submitted to immunohistochemistry (IHC) for MMP9 and TIMP-1. Light microscopy analysis showed cardiac striated muscle without fibrosis in all experimental groups. Immunostaining of MMP9 and TIMP-1 were positive for all experimental groups. LA administration significatively reduced MMP9 content after HF. These data indicate molecular changes in metalloproteinases expression prior to tissue remodeling and point out LA as an adjuvant therapy to pharmacological treatment of patients with HF. PMID: 31099017 [PubMed - as supplied by publisher]
Source: Histology and Histopathology - Category: Cytology Tags: Histol Histopathol Source Type: research

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In this study, analysis of antioxidant defense was performed on the blood samples from 184 "aged" individuals aged 65-90+ years, and compared to the blood samples of 37 individuals just about at the beginning of aging, aged 55-59 years. Statistically significant decreases of Zn,Cu-superoxide dismutase (SOD-1), catalase (CAT), and glutathione peroxidase (GSH-Px) activities were observed in elderly people in comparison with the control group. Moreover, an inverse correlation between the activities of SOD-1, CAT, and GSH-Px and the age of the examined persons was found. No age-related changes in glutathione reductas...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
The objective of this study was to investigate the vulnerability of hearts with aging, LVH, diabetes, and pregnancy to ischemic insult and their response to pacing postconditioning- (PPC-) induced heart protection. Methods: Hearts isolated from aged, spontaneously hypertensive and diabetic male and female rats and hearts from pregnant female rats (n=8 per group) were subjected to coronary occlusion followed by reperfusion using a modified Langendorff system. Hemodynamics data were computed digitally, and cardiac damage was accessed by measurements of infarct size and cardiac enzyme release. Results: There were no...
Source: Cardiology Research and Practice - Category: Cardiology Authors: Tags: Cardiol Res Pract Source Type: research
hio S Abstract Background: Risk stratification is a crucial issue in heart failure. Clinicians seek useful tools to tailor therapies according to patient risk. Methods: A prospective, observational, multicenter study on stable chronic heart failure outpatients with reduced left ventricular ejection fraction (HFrEF). Baseline demographics, blood, natriuretic peptides (NPs), high-sensitivity troponin I (hsTnI), and echocardiographic data, including the ratio between tricuspid annular plane excursion and systolic pulmonary artery pressure (TAPSE/PASP), were collected. Association with death for any cause was ana...
Source: Cardiology Research and Practice - Category: Cardiology Authors: Tags: Cardiol Res Pract Source Type: research
Introduction In healthy individuals, cerebral blood flow (CBF) increases during exercise, but few studies have compared changes in CBF during exercise in patients with heart failure (HF) to healthy controls (CTRL) or assessed the effects of left ventricular assist devices (LVAD). We hypothesized that subjects implanted with LVAD would exhibit impaired cerebrovascular responses to cycle exercise when compared with age- and sex-matched healthy CTRL subjects but would have enhanced responses relative to subjects with HF. Methods Internal carotid artery (ICA) blood flow and intracranial middle (MCAv) and posterior cerebra...
Source: Medicine and Science in Sports and Exercise - Category: Sports Medicine Tags: CLINICAL SCIENCES Source Type: research
Conclusions: Compared with standard management, the SAFETY intervention is potentially a dominant strategy for those with chronic, non-valvular AF. However, there would be substantial value in reducing the uncertainty in these estimates from further research. Trial registration: the Australian New Zealand Clinical Trials Registry (ANZCTRN 12610000221055). PMID: 31190590 [PubMed - as supplied by publisher]
Source: Journal of Medical Economics - Category: Health Management Tags: J Med Econ Source Type: research
Authors: Shchekochikhin D, Nikiforova T, Shilova A, Nesterov A, Baturina O, Gognieva D, Kozlovskaya N, Syrkin A, Kopylov P Abstract Background: Determining the prognosis of heart failure with preserved ejection fraction (HFpEF) is problematic, as the ejection fraction cannot be used. Formulae that estimate glomerular filtration rate (eGFR) may be potential prognosticators for this condition, since renal dysfunction is a well-known predictor of poor outcomes of all forms of heart failure. Methods: A prospective observational study of 117 HFpEF patients (average age 71.6±9.1 years; 65.8% women) who had eGFR de...
Source: International Journal of Nephrology and Renovascular Disease - Category: Urology & Nephrology Tags: Int J Nephrol Renovasc Dis Source Type: research
A new scientific statement outlines guidance on managing concomitant heart failure and diabetes, common conditions that often occur together.Medscape Medical News
Source: Medscape Cardiology Headlines - Category: Cardiology Tags: Cardiology News Source Type: news
Each night millions of patients use continuous positive airway pressure (CPAP) to treat obstructive sleep apnea (OSA). To facilitate monitoring of treatment success, modern CPAP machines routinely record and analyze the respiratory signal in near real-time and submit some of these data to the manufacturer's centralized cloud server. Some of the conditions frequently associated with OSA such as heart failure or chronic obstructive pulmonary disease result in characteristic changes of the respiratory signal (“signatures”), especially during exacerbations. Thus, this infrastructure could be leveraged to detect cha...
Source: Journal of Clinical Sleep Medicine : JCSM - Category: Sleep Medicine Source Type: research
Constrictive Pericarditis(CP) can be viewed as a constellation of syndromes resulting from compression of the heart, etiologies, course and types are well discussed in other reports. However, localized CP as a...
Source: Journal of Cardiothoracic Surgery - Category: Cardiovascular & Thoracic Surgery Authors: Tags: Case report Source Type: research
ConclusionsThe Sickness Behavior cluster had a negative impact on QOL and suggests that incorporating an evaluation of these symptoms may facilitate identification and treatment of symptoms having an additive and detrimental influence on QOL. Studies to examine the stability of the clusters are warranted.
Source: Heart and Lung: The Journal of Acute and Critical Care - Category: Respiratory Medicine Source Type: research
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