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Chronic Heart Failure Patients (chronic + heart_failure_patient)
Selected AbstractsNonlinear Indices of Heart Rate Variability in Chronic Heart Failure Patients: Redundancy and Comparative Clinical ValueJOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY, Issue 4 2007ROBERTO MAESTRI M.S. Aims: We aimed to assess the mutual interrelationships and to compare the prognostic value of a comprehensive set of nonlinear indices of heart rate variability (HRV) in a population of chronic heart failure (CHF) patients. Methods and Results: Twenty nonlinear HRV indices, representative of symbolic dynamics, entropy, fractality-multifractality, predictability, empirical mode decomposition, and Poincaré plot families, were computed from 24-hour Holter recordings in 200 stable CHF patients in sinus rhythm (median age [interquartile range]: 54 [47,58] years, LVEF: 23 [19,28]%, NYHA class II,III: 88%). End point for survival analysis (Cox model) was cardiac death or urgent transplantation. Homogeneous variables were grouped by cluster analysis, and in each cluster redundant variables were discarded. A prognostic model including only known clinical and functional risk factors was built and the ability of each selected HRV variable to add prognostic information to this model assessed. Bootstrap resampling was used to test the models stability. Four nonlinear variables showed a correlation >0.90 with classical linear ones and were discarded. Correlations >0.80 were found between several nonlinear variables. Twelve clusters were obtained and from each cluster a candidate predictor was selected. Only two variables (from empirical mode decomposition and symbolic dynamics families) added prognostic information to the clinical model. Conclusion: This exploratory study provides evidence that, despite some redundancies in the informative content of nonlinear indices and strong differences in their prognostic power, quantification of nonlinear properties of HRV provides independent information in risk stratification of CHF patients. [source] The Effect of Anemia on Mortality in Indigent Patients With Mild-to-Moderate Chronic Heart FailureCONGESTIVE HEART FAILURE, Issue 2 2006Kathy Hebert MD Anemia has been described as an independent predictor of death in patients with chronic heart failure. Little is known, however, about the significance of anemia in heart failure patients with severely depressed socioeconomic backgrounds who receive comprehensive care in a heart failure management program. The impact of anemia on mortality was investigated in 410 indigent chronic heart failure patients, the majority of whom were in New York Heart Association functional class I,III and were treated with angiotensin-converting enzyme inhibitors or angiotensin receptor blockers and , blockers at maximally tolerated doses. Anemia was present in 28% of patients. In an adjusted Cox analysis, anemia was strongly associated with mortality, but only in men: hazard ratio, 2.54; 95% confidence interval, 1.31,4.93; p=0.006. The investigators conclude that anemia in this population is common and that, for men, the relative risk increase associated with anemia is high. [source] Acute and Chronic Oral Magnesium Supplementation: Effects on Endothelial Function, Exercise Capacity, and Quality of Life in Patients With Symptomatic Heart FailureCONGESTIVE HEART FAILURE, Issue 1 2006Johanna C. Fuentes MD Endothelial dysfunction is an important pathophysiologic mechanism in the progression of heart failure. The objective of the present study was to determine the effects of acute and chronic oral magnesium supplementation on endothelial function in patients with symptomatic heart failure. Twenty-two symptomatic chronic heart failure patients were randomized to receive 800 mg oral magnesium oxide daily or placebo for 3 months. Data collected included large and small arterial elasticity/compliance, hemodynamic parameters, exercise capacity, and quality-of-life score at baseline, 1 week, and 3 months. Patients who received magnesium had improved small arterial compliance at 3 months from baseline compared with placebo. This study suggests that chronic supplementation with oral magnesium is well tolerated and could improve endothelial function in symptomatic heart failure patients. [source] Effect of Bisoprolol on Right Ventricular Function and Brain Natriuretic Peptide in Patients With Heart FailureCONGESTIVE HEART FAILURE, Issue 3 2004Luís Beck-da-Silva MD Beta-blocker use improves left ventricular ejection fraction (LVEF) in patients with heart failure. A similar effect of , blockers on right ventricular function has been proposed, although the effect of bisoprolol, a highly selective ,-1 blocker, on right ventricular function has not been assessed. This study investigated the short-term effect of bisoprolol on right ventricular function in chronic heart failure patients. A cohort of 30 heart failure patients who were not taking , blockers at baseline was studied prospectively. Right ventricular ejection fraction (RVEF) and LVEF were measured at both baseline and 4 months by radionuclide angiography. Bisoprolol was up-titrated during four monthly visits by a preestablished protocol to a target dose of 10 mg/d. The dose of vasodilators was not changed. Quality of life and brain natriuretic peptide level were assessed. Mean age was 62.7±14.3 years. Baseline RVEF was 30.7%±6.3% and baseline LVEF was 21.7%±9.4%. Mean bisoprolol dose reached was 5.3±3.9 mg daily. At 4 months, RVEF significantly increased by 7.1 % (95% confidence interval, 3.9,10.2; p=0.0001) and LVEF also increased significantly by 7.9% (95% confidence interval, 4.0%,11.9%p=0.0003). Quality-of-life score improved from 42.8 to 30.8 (p=0.047). No correlation was found between brain natriuretic peptide levels and RVEF. Bisoprolol treatment for 4 months resulted in a significant improvement of RVEF, which paralleled the improvement of LVEF. [source] Muscle afferent contributions to the cardiovascular response to isometric exerciseEXPERIMENTAL PHYSIOLOGY, Issue 6 2004James P. Fisher The cardiovascular response to isometric exercise is governed by both central and peripheral mechanisms. Both metabolic and mechanical stresses on the exercising skeletal muscle produce cardiovascular change, yet it is often overlooked that the afferent signal arising from the muscle can be modified by factors other than exercise intensity. This review discusses research revealing that muscle fibre type, muscle mass and training status are important factors in modifying this peripheral feedback from the active muscles. Studies in both animals and humans have shown that the pressor response resulting from exercise of muscle with a faster contractile character and isomyosin content is greater than that from a muscle of slower contractile character. Athletic groups participating in training programmes that place a high anaerobic load on skeletal muscle groups show attenuated muscle afferent feedback. Similarly, longitudinal studies have shown that specific local muscle training also blunts the pressor response to isometric exercise. Thus it appears that training may decrease the metabolic stimulation of muscle afferents and in some instances chronic exposure to the products of anaerobic metabolism may blunt the sensitivity of the muscle metaboreflex. There may be surprising parallels between the local muscle conditions induced in athletes training for longer sprint events (e.g. 400 m) and by the low-flow conditions in, for example, the muscles of chronic heart failure patients. Whether their similar attenuations in muscle afferent feedback during exercise are due to decreased metabolite accumulation or to a desensitization of the muscle afferents is not yet known. [source] Non-invasive ventilation in do-not-intubate patients: five-year follow-up on a two-year prospective, consecutive cohort studyACTA ANAESTHESIOLOGICA SCANDINAVICA, Issue 9 2009H.-H. BÜLOW Background: End-of-life decisions are common in intensive care units (ICUs), and increasingly, non-invasive ventilation (NIV) is used as a ceiling of ventilatory care. However, little is known about the outcome following that decision. Methods: An observational, single-center, retrospective, follow-up study with no interventions, on ICU patients treated with NIV and a do-not-intubate (DNI) order. The patients were followed until a 5-year survival rate could be calculated. Results: One hundred and fifty-seven patients were treated with NIV during 2002 and 2003, and among 38 a DNI order was in effect. Of the 38 DNI patients, 11 died in the ICU, 16 died on the ward and 11 survived the hospital stay. Five of these 11 survivors died within 6 months, two died after 2.7 and 3.3 years, respectively, but four were still alive after 5 years. The long-term (>6 months) survivors have, surprisingly only been admitted to the hospital 0,2 times a year , and seldom with the need for ICU treatment. Conclusions: According to this study, and previous ones, it seems worthwhile treating DNI patients with NIV. Twenty-five to 35% leave the hospital alive, every 6th patient lives for at least 1 year, and this paper shows that 10% may survive for 5 years or more. However, only chronic obstructive pulmonary disease and chronic heart failure patients (both with a concomitant low APACHE score) seem to have a reasonable outcome, and patients should be informed about this. So far, no study has investigated the quality of life of these survivors. [source] A randomized controlled trial of a community nurse-supported hospital discharge programme in older patients with chronic heart failureJOURNAL OF CLINICAL NURSING, Issue 1 2008Timothy Kwok MD Aims and objectives., To evaluate the effectiveness and cost-effectiveness of a community nurse-supported hospital discharge programme in preventing hospital re-admissions, improving functional status and handicap of older patients with chronic heart failure. Design., Randomized controlled trial; 105 hospitalized patients aged 60 years or over with chronic heart failure and history of hospital admission(s) in previous year were randomly assigned into intervention group (n = 49) and control group (n = 56) for six months. Intervention group subjects received community nurse visits before discharge, within seven days of discharge, weekly for four weeks, then monthly. Community nurse liaised closely with a designated specialist in hospital and were accessible to subjects during normal working hours. Control and intervention group subjects were followed up in the same specialist medical clinics. Primary outcome was the rate of unplanned re-admission at six months. Secondary outcomes were number of unplanned re-admissions, six-minute walking distance, London Handicap Scale and public health care and personal care costs. Results., At sixth months, the re-admission rates were not significantly different (46 vs. 57% in control subjects, p = 0·233, Chi-square test). But the median number of re-admissions tended to lower in the intervention group (0 vs. 1 in control group, p = 0·057, Mann Whitney test). Intervention group subjects had less handicap in independence (median change 0 vs. 0·5 in control subjects, p = 0·002, Mann Whitney test), but there was no difference in six-minute walking distance. There was no significant group difference in median total public health care and personal care costs. Conclusion., Community nurse-supported post-discharge programme was effective in preserving independence and was probably effective in reducing the number of unplanned re-admissions. The cost benefits to public health care were not significant. Relevance to clinical practice., Older chronic heart failure patients are likely to benefit from post-discharge community nurse intervention programmes. More comprehensive health economic evaluation needs to be undertaken. [source] Older patients with chronic heart failure within Swedish community health care: a record review of nursing assessments and interventionsJOURNAL OF CLINICAL NURSING, Issue 1 2004Anna Ehrenberg PhD Background., Older patients with chronic heart failure constitute a large group within community home care that is at high risk for re-hospitalization. However, hospital readmission can be prevented if early signs of deterioration are recognized and proper interventions applied. Aims and objectives., The aim of the study was to audit nursing care for older chronic heart failure patients within the Swedish community health care system. Design., The study adopted a retrospective descriptive design. Methods., In a Swedish urban municipality nursing documentation from 161 records on patients diagnosed with chronic heart failure was collected retrospectively from community nursing home care units. Patient records were reviewed for characteristics of nursing care and assessed for comprehensiveness in recording. Results., The main results showed that medical care of patients with chronic heart failure was poorly recorded, making it possible only to follow fragments of the care process. The nursing notes showed poor adherence to current clinical guidelines. Only 12% of the records contained notes on patients' body weight and only 4% noted patients' knowledge about chronic heart failure. When interventions did occur, they largely consisted of drug administration. Conclusions., The findings revealed flaws in the recording of specific assessment and interventions as well as poor adherence to current international clinical guidelines. Relevance to clinical practice., Supportive guidelines available at the point of care are needed to enhance proper community-based home health care for older patients with chronic heart failure. [source] | ||||||||||