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Kärki Satu S Department of Automation Science and Engineering, Tampere University of Technology, P.O. Box 692, FI-33101, Finland. - - 2008
Film-type transducer materials polyvinylidenefluoride (PVDF) and ElectroMechanical Film (EMFi) were used in the measurement of heart and respiration rates on the chest wall at rest. The aim here was to evaluate if the both materials are capable to measure the heart and respiration rates correctly and also to found out ...
Cheng Teddy M TM School of Electrical Engineering and Telecommunications, the University of New South Wales, Sydney, Australia. - - 2008
In this study, a control design is proposed for the tracking control of heart rate response during treadmill exercise. The controller tracks an exerciser's heart rate to a given heart rate profile, that may represent a prescribed exercise protocol, by varying the speed of the treadmill. A guaranteed cost control ...
Kitzman Dalane W DW Section of Cardiology, Wake Forest University Health Sciences, Winston-Salem, NC 27157, USA. - - 2008
Exercise intolerance is the primary symptom of chronic diastolic heart failure. It is part of the definition of heart failure and is intimately linked to its pathophysiology. Further, exercise intolerance affects the diagnosis and prognosis of heart failure. In addition, understanding the mechanisms of exercise intolerance can lead to developing ...
Lund Lars H - - 2008
The incidence and prevalence of heart failure increase with age. The cardinal manifestation of heart failure is exercise intolerance. The cardiopulmonary exercise test with determination of peak VO(2) provides an integrated measure of both central and peripheral abnormalities in heart failure. It is used to predict prognosis, identify patients for ...
Yamamoto Umpei - - 2007
BACKGROUND: Sleep-disordered breathing (SDB) is common in patients with heart failure and carries an independent risk for poor long-term prognosis. We aimed to study the effects of supervised, aerobic exercise training for 6 months on SDB in patients with chronic heart failure. METHODS AND RESULTS: We enrolled 18 patients having ...
Muthumala Amal - - 2008
Chronic heart failure and chronic obstructive pulmonary disease are both increasing in prevalence throughout the developed world. Despite new therapies especially for chronic heart failure, morbidity and mortality rates for both conditions remain high. This editorial highlights the skeletal myopathy that has been recognised in both diseases, and its central ...
MacGowan Guy A - - 2007
It is unclear whether cardiopulmonary stress testing provides prognostic information in patients with very advanced heart failure receiving contemporary medical therapy. Analysis of cardiopulmonary treadmill stress data in a group of patients with advanced heart failure and severe functional impairment was performed (N=102, peak exercise oxygen consumption [VO2] < or ...
Albouaini Khaled - - 2007
Cardiopulmonary exercise testing (CPET) has become an important clinical tool to evaluate exercise capacity and predict outcome in patients with heart failure and other cardiac conditions. It provides assessment of the integrative exercise responses involving the pulmonary, cardiovascular and skeletal muscle systems, which are not adequately reflected through the measurement ...
Albouaini K - - 2007
Cardiopulmonary exercise testing (CPET) has become an important clinical tool to evaluate exercise capacity and predict outcome in patients with heart failure and other cardiac conditions. It provides assessment of the integrative exercise responses involving the pulmonary, cardiovascular and skeletal muscle systems, which are not adequately reflected through the measurement ...
Brassard Patrice - - 2007
Several chronic diseases are known to negatively affect the ability of an individual to perform exercise. However, the altered exercise capacity observed in these patients is not solely associated with the heart and lungs dysfunction. Exercise has also been shown to play an important role in the management of several ...
Giardini Alessandro - - 2007
BACKGROUND: The identification of patients with adult congenital heart disease (ACHD) who are at higher risk of death is challenging. Peak circulatory power (CircP; expressed as peak exercise oxygen uptake multiplied for peak mean arterial blood pressure) is a strong predictor of death in adults with acquired heart disease. We ...
Guazzi M - - 2008
Reflex neural oversignaling sensitive to muscle by-products (ergoreflex) causes exercise hyperventilation in heart failure (HF). We probed whether an improved endothelial function with sildenafil intake may prevent this effect. In 16 chronic heart failure patients and 16 normal subjects, before and after sildenafil intake (50 mg) or placebo, we measured ...
Witham Miles D - - 2007
Little is known about how physical and psychological status changes with time in older heart failure patients. The authors followed up a cohort of 82 patients (mean age, 80.5 years) enrolled in a randomized controlled trial of exercise training in heart failure. Six-minute walk test, accelerometry, functional status, quality of ...
Bensimhon Daniel R - - 2007
BACKGROUND: Technetium Tc 99m gated single photon emission computed tomography (SPECT) has become the cornerstone of noninvasive risk stratification in patients with ischemic heart disease, but its role in patients with heart failure is not as well established. STUDY DESIGN: This study is a substudy of the Heart Failure and ...
Kemi Ole Johan - - 2007
OBJECTIVE: Clinical and experimental studies demonstrate that exercise training improves aerobic capacity and cardiac function in heart failure, even in patients on optimal treatment with angiotensin inhibitors and beta-blockers, but the cellular mechanisms are incompletely understood. Since myocardial dysfunction is frequently associated with impaired energy status, the aim of this ...
Wisløff Ulrik - - 2007
Exercise training reduces the symptoms of chronic heart failure. Which exercise intensity yields maximal beneficial adaptations is controversial. Furthermore, the incidence of chronic heart failure increases with advanced age; it has been reported that 88% and 49% of patients with a first diagnosis of chronic heart failure are >65 and ...
Brubaker Peter H - - 2007
Although chronotropic incompetence (CI) has been shown to have important prognostic value in asymptomatic and coronary artery disease populations, much less attention has been given to the prevalence and impact of CI in heart failure. There is considerable variability in the reported prevalence of chronotropic impairment (25%-70%) in the heart ...
Adachi Hitoshi - - 2007
Insulin resistance is associated with various cardiac dysfunctions both molecularly and clinically, including cardiac muscle relaxation and blood flow. Although, these dysfunctions result in heart failure, relationship between insulin resistance and severity of heart failure is not well studied yet. Since severity of chronic heart failure can be determined by ...
Arena Ross - - 2007
BACKGROUND: Ventilatory efficiency, commonly assessed by the minute ventilation (VE)-carbon dioxide production (VCO2) slope, is a powerful prognostic marker in the heart failure population. The purpose of the present study is to refine the prognostic power of the VE/VCO2 slope by developing a ventilatory class system that correlates VE/VCO2 cut ...
Warburton Darren E R - - 2007
In this narrative review of the current literature, we examine the central and peripheral mechanisms responsible for the exercise intolerance of chronic heart failure and highlight briefly the benefits of exercise training in the treatment of this debilitating disorder. Specifically, we identify the common finding of reduced cardiac output reserve ...
Listerman Jennifer - - 2007
Anemic heart failure patients with systolic dysfunction are known to have reduced exercise capacity. Whether this is related to poor hemodynamic adaptation to anemia is not known. Peak exercise oxygen consumption (VO2) and hemodynamics at rest and peak exercise were assessed among 209 patients and compared among those who were ...
Corrà Ugo - - 2007
Cardiopulmonary exercise testing (CPET) is a non-invasive tool that provides the physician with relevant information to assess the integrated response to exercise involving pulmonary, cardiovascular, haematopoietic, neuro-psychological, and skeletal muscle systems. Measurement of expiratory gases during exercise allows the best estimate of functional capacity, grade the severity of the impairment, ...
Diks J - - 2007
BACKGROUND: This study aimed to evaluate the feasibility and efficacy of a mechanical minimally invasive manipulator for endoscopic surgery. In contrast to currently available motorized master-slave manipulators, this mechanical manipulator consists of two purely mechanical, hand-controlled endoscopic arms with joints that allow seven degrees of freedom (DOF). METHODS: For the ...
Whellan David J - - 2007
BACKGROUND: Although there are limited clinical data to support the use of exercise training as a means to reduce mortality and morbidity in patients with heart failure, current guidelines state that exercise is beneficial. TRIAL DESIGN: The objective of this trial is to determine whether exercise training reduces all-cause mortality ...
Herdy A H - - 2007
Patients with heart failure who have undergone partial left ventriculotomy improve resting left ventricular systolic function, but have limited functional capacity. We studied systolic and diastolic left ventricular function at rest and during submaximal exercise in patients with previous partial left ventriculotomy and in patients with heart failure who had ...
Ferasin L - - 2007
Exercise testing is not commonly used in canine medicine because of several limitations. The aim of this study was to investigate the suitability of a treadmill test to measure the exercise capacity of untrained canine cardiac patients and to measure some biological parameters that might reflect the tolerance of dogs ...
Leeper Nicholas J - - 2007
BACKGROUND: The initial response of heart rate to dynamic exercise has been proposed as having prognostic value in limited studies that have used modalities other than the treadmill. Our aim was to evaluate the prognostic value of early heart rate parameters in patients referred for routine clinical treadmill testing. METHODS ...
Weigand Kilian K Department of Gastroenterology and Hepatology, Medicine IV, University of Heidelberg, 69120 Heidelberg, Germany. - - 2007
While cardiopulmonary symptoms are common in patients undergoing classical or, due to physical exercise, exertional heat stroke, the failure of other organs is a rarely described phenomenon. Here we present two cases of acute hepatic failure, one due to classic heat shock, while the other occurred while the patient was ...
Siu Parco M PM Cardiovascular Division, Beth Israel Deaconess Medical Center, 330 Brookline Ave, SL-423C, Boston, MA 02215, - - 2007
The role of caspase-independent apoptotic events in heart failure is largely unknown. The present study examined the response of apoptotic factors, which can function independently of caspase machinery including AIF, EndoG, and HtrA2/Omi to high salt diet-induced pathologic heart failure and exercise-induced physiologic cardiac hypertrophy. Following approximately 4 months of ...
Boudreau Mary - - 2007
Heart failure is one of the major health problems found in the United States today. Medical and interventional therapies play an important role in the treatment of this chronic condition, but they create a huge economic burden on the health care system. Nonpharmacologic interventions need further exploration. This article reviews ...
Piechota Wiktor - - 2007
Chronic heart failure is a debilitating condition with a poor prognosis despite advances in medical and invasive treatment modalities. Attempts have been made to improve risk stratification in order to single out very-high-risk patients who could benefit from invasive and costly therapies. Unfortunately clinical, echocardiographic, radiological or biochemical measurements performed ...
Jolly Kate - - 2007
Exercise has been shown to be beneficial for selected patients with heart failure, but questions remain over its effectiveness, cost-effectiveness and uptake in a real world setting. This paper describes the design, rationale and recruitment for a randomised controlled trial that will explore the effectiveness and uptake of a predominantly ...
Hui Elsie - - 2006
PURPOSE: The aim of this study was to develop and evaluate a community-based programme for heart failure patients, with emphasis on exercise and education. METHOD: In a before-and-after trial, subjects with heart failure underwent a 12-week group programme comprising of exercise, education and mutual support. Outcome measures included subjects' compliance ...
Milani Richard V RV Department of Cardiovascular Diseases, Ochsner Medical Center, Ochsner Heart and Vascular Institute, New Orleans, LA 70121, USA. - - 2006
Cardiopulmonary exercise testing adds important additional information to that provided by the standard exercise test. In particular, cardiopulmonary exercise testing provides precise determination of aerobic capacity, the causes of dyspnea with exertion, and prognosis in patients with systolic heart failure. This review provides basic, practical information about cardiopulmonary exercise testing ...
Abbottsmith Charles W - - 2006
The Prospective Evaluation of Enhanced External Counterpulsation in Congestive Heart Failure (PEECH) trial demonstrated that enhanced external counterpulsation (EECP) therapy increased exercise duration and improved functional status and quality of life without affecting peak oxygen consumption. The authors present data from a prespecified subgroup of elderly patients (65 years or ...
McCarthy M - - 2006
Using a mathematical procedure, we determine appropriate sampling rates for logging heart rate, at a variety of exercise intensities. The mathematical procedure involves correlating exercise and heart rate data to determine a dynamical mathematical model, from which the frequency response of the relationship between exercise intensity and heart rate can ...
Oh K J - - 2006
Acute renal failure (ARF) with severe loin pain induced by anaerobic exercise is a rare condition that is accompanied by wedge-shaped contrast enhancement seen on computerized tomographic (CT) scan without evidence of rhabdomyolysis. An 18-year-old Korean male was transferred to our hospital for evaluation of mild azotemia, that developed after ...
Stahl Christine E - - 2006
BACKGROUND: We describe a rare case of severe rhabdomyolysis provoked by ingestion of a performance-enhancer herbal supplement containing ephedra. CASE REPORT: A healthy 21-year-old Army soldier complained of "complete muscle failure" after collapsing at the end of Army Physical Fitness Test. The patient was found to be tachycardic and hypotensive, ...
Feldman Arthur M - - 2006
OBJECTIVES: The PEECH (Prospective Evaluation of Enhanced External Counterpulsation in Congestive Heart Failure) study assessed the benefits of enhanced external counterpulsation (EECP) in the treatment of patients with mild-to-moderate heart failure (HF). BACKGROUND: Enhanced external counterpulsation reduced angina symptoms and extended time to exercise-induced ischemia in patients with coronary artery ...
Diller Gerhard-Paul - - 2006
OBJECTIVES: To assess the prognostic value of heart rate response to exercise in adult congenital heart disease (ACHD) patients. BACKGROUND: An abnormal heart rate response to exercise is related to autonomic dysfunction and may have prognostic implications in ACHD. METHODS: We identified 727 consecutive ACHD patients (mean age [+/- SD] ...
Tabet Jean Yves - - 2006
The prognostic value of exercise-derived variables in the prediction of mortality in patients with chronic heart failure treated by beta blockers continues to be debated. A total of 402 patients with chronic heart failure, including 255 treated with beta blockers, were included and followed for 26 +/- 20 months after ...
Molloy Gerard J - - 2006
BACKGROUND: The impact of exercise programmes for heart failure on those close to the patient is largely unknown. We examined the effect of a hospital and home-based exercise intervention on burden, anxiety and depression of informal caregivers. DESIGN: The study was a randomized, controlled trial. Heart failure patients were randomized ...
Bilsel Tuba - - 2006
An attenuated heart rate recovery (HRR) immediately after exercise has been shown to be predictive of mortality. It is not known whether HRR predicts mortality when measured in patients with heart failure. The present study was undertaken to evaluate the ability of HRR to predict mortality in patients with heart ...
Smart Neil - - 2006
The improvement of exercise capacity due to exercise training in heart failure has been associated with peripheral adaptation, but the contribution of cardiac responses is less clear. We sought the extent to which the improvement of functional capacity in patients undergoing exercise training for heart failure was related to myocardial ...
Keteyian Steven J - - 2006
The past 15 years of research involving patients with heart failure have provided a lot of new information regarding how exercise training lessens the exercise intolerance that is characteristic of these patients. Despite these new understandings, the prescription of regular exercise and rehabilitation in eligible patients is not embraced by ...
Piepoli Massimo F - - 2006
The reduction of exercise capacity with early occurrence of fatigue and dyspnea is a hallmark of heart failure syndrome. There are objective similarities between heart failure and muscular deconditioning. Deficiencies in peripheral blood flow and skeletal muscle function, morphology, metabolism, and function are present. The protective effects of physical activity ...
- - 2006
Cardiopulmonary exercise testing (CPET) provides a global assessment of the integrated response to exercise involving the pulmonary, cardiovascular, haematopoietic, neuropsychological, and skeletal muscle systems. This information cannot be obtained through investigation of the individual organ systems in isolation. The non-invasive, dynamic physiological overview permits the evaluation of both submaximal and ...
Adams Gregory R - - 2006
A number of chronic illnesses such as renal failure (CRF), obstructive pulmonary disease, and congestive heart failure result in a significant decrease in exercise tolerance. There is an increasing awareness that prescribed exercise, designed to restore some level of physical performance and quality of life, can be beneficial in these ...
Thomas Kuruvilla - - 2006
A 73-year-old woman with dementia was given clozapine for treatment-resistant psychotic symptoms. Subsequently, she developed cardiac failure. Caution should be exercised when using clozapine, especially in the elderly.
Bard Robert L - - 2006
BACKGROUND: Ventilatory efficiency, the relationship between ventilation (VE) and carbon dioxide production (VCO2), predicts mortality in heart failure patients, but its determination has not been standardized. Additionally, it is unclear if the prognostic power of ventilatory efficiency is independent of exercise intensity. Therefore, we investigated the relative prognostic power of ...
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