Remodeling of Retinal Arterioles and Carotid Arteries in Heart Failure Development-A Preliminary Study.

Current data indicate that heart failure (HF) is associated with inflammation and microvascular dysfunction and remodeling. These mechanisms could be involved in HF development and progression, especially in HF with preserved ejection fraction (HFpEF). We aimed to compare structural changes in retinal arterioles and carotid arteries between HF patients and patients without heart failure. This preliminary, retrospective, case-control study included 28 participants (14 patients with HFpEF and 14 age- and sex-matched healthy controls). Carotid intima-media thickness to lumen ratio (cIMTLR) was assessed using B-mode ultrasonography. Retinal arterioles wall- to-lumen ratio (rWLR) was assessed by adaptive optics camera rtx1. The HF patients had higher IMTLR (Δmedian [HFpEF-control group] 0.07, p = 0.01) and eWLR (Δmedian 0.03, p = 0.001) in comparison to patients without HF. In the whole study group, rWLR correlated significantly with IMTLR (r = 0.739, p = 0.001). Prevalence of arterial hypertension was similar in both groups, however, patients with HF had a significantly lower office, central and 24-h ambulatory blood pressure (systolic Δmedian -21 to -18 mmHg; diastolic Δmedian -23 to -10 mmHg). Our data suggests gradual and simultaneous progression of vascular remodeling in both retinal arterioles and carotid arteries in HFpEF patients. This process could be a marker of HF development. Significantly lower blood pressure values in HF group may indicate that vascular remodeling could be independent of BP control. Nevertheless, further and larger prospective studies allowing to reduce the impact of confounding and address temporality are warranted.

Beneficial In Vitro Effects of a Low Myo-Inositol Dose in the Regulation of Vascular Resistance and Protein Peroxidation under Inflammatory Conditions.

Oxidative stress induces functional changes in arteries. Therefore, the effect of myo-inositol, a possible anti-inflammatory/antioxidant agent was studied on human plasma and rat thoracic arteries. Aortic rings from male Wistar rats (3 months of age) were incubated with myo-inositol (1, 10 and 100 µM, 120 min) and analyzed using the gas chromatography (GC) method. In another experiment, aortic rings were protected first with myo-inositol (1 µM, 60 min) and then subjected to a thromboxane receptor agonist (U-46619, 0.1 nM, 60 min). Therefore, these four groups under the following conditions were studied: (i) the control in the vehicle; (ii) myo-inositol; (iii) the vehicle plus U-46619; (iv) myo-inositol plus U-46619. The hemostatic parameters of human plasma and an H2O2/Fe2+ challenge for lipid and protein peroxidation were also performed. Myo-inositol was not absorbed into the pre-incubated aortic rings as measured by the GC method (0.040 µg/mg, p ≥ 0.8688). The effect of myo-inositol was more significant in the impaired arteries due to U-46619 incubation, which resulted in an improved response to acetylcholine (% Emax: 58.47 vs. 86.69), sodium nitroprusside (logEC50: −7.478 vs. −8.076), CORM-2 (% Emax: 44.08 vs. 83.29), pinacidil (logEC50: −6.489 vs. −6.988) and noradrenaline (logEC50: −7.264 vs. −6.525). This was most likely a possible response to increased nitric oxide release (×2.6-fold, p < 0001), and decreased hydrogen peroxide production (×0.7-fold, p = 0.0012). KCl-induced membrane depolarization was not modified (p ≥ 0.4768). Both the plasma protein carbonylation (×0.7-fold, p = 0.0006), and the level of thiol groups (×3.2-fold, p = 0.0462) were also improved, which was not significant for TBARS (×0.8-fold, p = 0.0872). The hemostatic parameters were also not modified (p ≥ 0.8171). A protective effect of myo-inositol was demonstrated against prooxidant damage to human plasma and rat thoracic arteries, suggesting a strong role of this nutraceutical agent on vasculature which may be of benefit against harmful environmental effects.

Takotsubo cardiomyopathy triggered by a single dose of flecainide in patient with focal atrial tachycardia.

First described in 1990, Takotsubo cardiomyopathy (TC) is a medical condition defined by acute and transient left ventricular (LV) dysfunction with a diversity of wall-motion abnormalities. TC can be induced by emotional and physical stress, as well as direct administration of catecholamines or medications which can cause a catecholamine surge. Although recorded incidences of TC have been rising over the last decade (currently 15-30 cases per 100,000 per year), this is most likely due to increased awareness and recognition of the condition. Electrocardiogram (ECG), imaging modalities such as echocardiography, coronary computed tomography angiography, cardiac magnetic resonance, and coronary angiography are important tools in the diagnosis of TC. The in-hospital mortality rate for patients admitted with TC reaches 5%. In our report, we describe a case of TC in a 30-years old female with a medical history of episodes of focal atrial tachycardia (AT) after intravenous administration of a single, maximum dose of flecainide.

A Review of Exercise as Medicine in Cardiovascular Disease: Pathology and Mechanism.

BACKGROUND: Physical inactivity and resultant lower energy expenditure contribute unequivocally to cardiovascular diseases, such as coronary artery disease and stroke, which are considered major causes of disability and mortality worldwide. AIM: The aim of the study was to investigate the influence of physical activity (PA) and exercise on different aspects of health - genetics, endothelium function, blood pressure, lipid concentrations, glucose intolerance, thrombosis, and self - satisfaction. Materials and. METHODS: In this article, we conducted a narrative review of the influence PA and exercise have on the cardiovascular system, risk factors of cardiovascular diseases, searching the online databases; Web of Science, PubMed and Google Scholar, and, subsequently, discuss possible mechanisms of this action. RESULTS AND DISCUSSION: Based on our narrative review of literature, discussed the effects of PA on telomere length, nitric oxide synthesis, thrombosis risk, blood pressure, serum glucose, cholesterol and triglycerides levels, and indicated possible mechanisms by which physical training may lead to improvement in chronic cardiovascular diseases. CONCLUSION: PA is effective for the improvement of exercise tolerance, lipid concentrations, blood pressure, it may also reduce the serum glucose level and risk of thrombosis, thus should be advocated concomitant to, or in some cases instead of, traditional drug-therapy.

Development of clinical value unit method for calculating patient costs.

The objective of the study was to develop the clinical value unit method of allocating indirect costs to patient costs using clinical factors. The method was tested to determine whether it is a more reliable alternative to using the length of stay and marginal mark-up allocation method. The method developed used data from a Polish specialist hospital. The study involved 4,026 patients grouped into nine diagnosis-related groups (DRG). The study methodology involved a three stage approach: (a) identification of correlates of patient costs, (b) a comparison of the costs calculated using the clinical value unit method with the alternative methods: length of stay and marginal mark-up methods, and (c) an estimation of the cost homogeneity of the DRGs. The study showed that length of stay cost allocation method may underestimate the proportion of indirect costs in patient costs for a short in-patient stay and overestimate the cost for the patients with a long stay. The total costs estimated using the marginal mark-up method were higher than those estimated with length of stay method. For most surgical procedures, the mean indirect costs are higher using clinical value unit method than when using length of stay or marginal mark-up method. In all medical procedure cases, the mean indirect costs calculated using the clinical value unit method are in the range between marginal mark-up and length of stay method. We also show that in all DRGs except one, that the coefficient of homogeneity for clinical value unit is higher than for length of stay or marginal mark-up method. We conclude that the clinical value unit method of cost allocation is a more precise and reliable alternative than the other methods.

Impact of anticoagulation on the effectiveness of loop diuretics in heart failure with cardiorenal syndrome and venous thromboembolism.

The limitations of diuretics in the treatment of acute decompensated heart failure (ADCHF) are progressive worsening of renal function and resistance to up-titrated doses. The occurrence of resistance to loop diuretics in patients with ADCHF is associated with worsening prognosis and increased mortality. In this study, we report two patients with ADCHF and resistance to loop diuretics suspected for venous thromboembolism, suggesting that heparin administered to ADCHF patients treated for venous thromboembolism with cardiorenal syndrome decreases right-ventricular overload and improves renal function. To our knowledge, these are the first reported cases describing restored responsiveness to loop diuretics in ADCHF patients after additional heparin administration.