Search Results
Results 401 - 450 of 848
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Yoshioka H - - 1995
The midcalf muscles of eight patients who had peripheral arterial occlusive disease were evaluated by exercise MRI before and after bypass surgery or percutaneous transluminal angioplasty. MRI showed a high intensity of these muscles, especially the posterior muscles, after exercise in all patients before intervention. The mean T2 relaxation time ...
Sagiv M - - 1995
The exercise training workload for cardiac patients is determined from the peak heart rate achieved safely during a stress test. Circadian rhythms may play a key role in changing physiological responses to the stress test. Therefore, the purpose of this study was to evaluate the influence of the time of ...
Fair J M - - 1995
Life-style habits such as diet and exercise can have powerful affects on the development and progression of coronary heart disease. This article presents evidence supporting the use of these two modalities in the treatment of coronary heart disease. Diet is discussed in terms of cholesterol, obesity, fiber, fish oils, and ...
Ades P A - - 1995
BACKGROUND: This study compared the effects of a formal exercise conditioning program of 3 and 12 months duration to spontaneous recovery in a population of older, post-coronary event patients. METHODS: Indices of peak exercise and submaximal exercise performance such as oxygen consumption, treadmill work capacity, minute ventilation, heart rate, and ...
Duncker D J - - 1995
The mechanism of coronary vasodilation produced by exercise is not understood completely. Recently, we reported that blockade of vascular smooth muscle K(ATP)+ channels decreased coronary blood flow at rest, but did not attenuate the increments in coronary flow produced by exercise. Adenosine is not mandatory for maintaining basal coronary flow, ...
Christian T F - - 1994
OBJECTIVE: To assess the incremental value and cost-effectiveness of exercise tomographic thallium-201 imaging compared with clinical and exercise electrocardiographic variables for detecting three-vessel or left main coronary artery disease in patients with normal at-rest electrocardiograms. DESIGN: Prospective cohort study. PARTICIPANTS: 411 patients (77 [19%] had three-vessel or left main disease) ...
Langbein W E - - 1994
The purpose of this initial study was to evaluate a new wheelchair ergometer (WCE) and exercise test protocol for the detection of coronary artery disease in men with lower limb disabilities. Forty-nine patients (63 +/- 9 yr) completed WCE tests without complications. Peak heart rate was 84 +/- 15% (mean ...
Walamies M - - 1994
We performed a sequential fatty acid exercise-rest scintigraphy in 18 patients with an initially successful percutaneous transluminal coronary angioplasty (PTCA) to study the concordance of trends in symptoms, exercise tolerance and myocardial metabolism. Eleven patients stopped the exercise because of angina pectoris in the preoperative test; 2 days after PTCA ...
McKirnan M D - - 1994
Coronary vascular adaptations to exercise training have been extensively studied at the microscopic level in animals and correlated with direct and indirect measurements of myocardial blood flow in patients with coronary artery disease. Animals have permitted more extensive study. These findings have generally supported an increased blood flow to the ...
Laughlin M H - - 1994
The purpose of this symposium was to evaluate the hypothesis that the beneficial effects of training are the result of training-induced adaptations in the coronary circulation. The approach is to review, summarize, and evaluate data concerning the effects of exercise training on the coronary circulation. Results indicate that aerobic exercise ...
Overholser K A - - 1994
The objective of this study was to measure effects of exercise training on coronary flow heterogeneity, microvascular transport, and hemodynamics. Five miniature swine were trained on a treadmill (ET) for 16 wk; five control pigs (C) were confined to cages for the same period. At the end of that period ...
Tomanek R J - - 1994
Numerous studies have examined the effects of exercise training on coronary angiogenesis. Although the conclusions drawn from these studies are sometimes conflicting, variabilities in training (magnitude, type and intensity), age and other factors need to be closely examined. Most studies on young animals indicate that capillary growth occurs providing that ...
Evans C H - - 1994
For primary care physicians, exercise testing is a cost-effective tool to evaluate patients presenting with symptoms. It helps to stratify those with probable coronary artery disease into a high-risk group needing referral and a low-risk group that can be observed. Each of the five main responses--the presence of myocardial ischemia, ...
Grumet J - - 1994
A growing number of physicians are performing exercise tests in their offices for the purposes of diagnosing cardiopulmonary disease and assessing exercise capacity in patients with heart disease. Methodology of testing is important in making the most effective use of the information gathered from the test. Selecting an approach that ...
Kugler J - - 1994
In coronary patients, emotional disturbances in the sense of increased anxiety and depression have often been documented. Over the last years, there has been a growing interest in the effects of exercise on emotion. This meta-analysis, based on 13 to 15 studies on psychological effects of exercise programmes in coronary ...
Lax K G - - 1994
Normal values for simple and rate-corrected measures of the duration and dispersion of electrocardiographic (ECG) repolarization during treadmill exercise were obtained in 94 clinically normal men, and the behavior of these measures during ischemia was examined in 79 men with catheterization-proven disease or with stable angina, all of whom had ...
Roger V L - - 1994
OBJECTIVES: This study examined the ability of exercise echocardiography to identify multivessel coronary artery disease and ascertain its incremental value when combined with clinical and exercise test variables. BACKGROUND: Although exercise echocardiography has been shown to be accurate for the detection of coronary artery disease, little is known about its ...
Backman C - - 1994
We have previously found a statistically significant correlation between some exercise ECG variables and angiocardiographic scores used to evaluate the extent and type of coronary heart disease (CHD). In the present study we examined the effects of digitalis, beta-adrenergic blockers, slow release nitrates, calcium channel blockers, presence of arterial hypertension ...
McClements B M - - 1994
OBJECTIVE: To assess the safety and value of an exercise electrocardiography service for the diagnosis of suspected ischaemic heart disease to which general practitioners have direct access. DESIGN: Direct access to a hospital exercise electrocardiography service was offered on a trial basis to 122 general practitioners in a defined urban ...
Marciniuk D D - - 1994
Clinical exercise testing has become an essential tool used in the early diagnosis, in the monitoring of treatment effectiveness, and in the assessment of impairment owing to ILD. Despite the assorted causes, the responses to exercise demonstrated by these diseases are generally similar. Although much has been learned about how ...
Ciavolella M - - 1994
BACKGROUND: The aim of this study was to identify specific characteristics associated with modifications of symptoms and to evaluate the presence of a pathophysiological link between radionuclide abnormalities and delayed run-off of coronary contrast dye in patients with angina and normal coronary arteries. METHODS: We followed up 53 patients (21 ...
Gauri F H - - 1994
Treadmill exercise test was performed in 100 patients, 50 were hypertensive who were not having any clinical or electrocardiographic manifestation of coronary artery disease and 50 were controls. The test was positive in 28% of hypertensive patients as compared to 6% in controls. This study therefore suggests that hypertension is ...
Folland E D - - 1994
BACKGROUND: Practitioners often assume a close relation between angiographic coronary artery stenosis and patient functional capacity. To test this unproven hypothesis, we analyzed the relation between coronary artery stenosis measured by different methods and maximal treadmill exercise tolerance in patients with single-vessel disease before and after intervention by percutaneous transluminal ...
Gonzalez R - - 1994
A recent examination of the relationship between O2 uptake (M(dot)O2) and diffusive sodium loss (JNaout) in a freshwater fish showed that Na+ losses after exhaustive exercise exceeded those expected on the basis of M(dot)O2, probably due to distortion of the paracellular tight junctions (the primary site of diffusive ion loss) ...
Kauhanen J - - 1994
A number of psychosomatic studies have suggested that alexithymia, impairment in identifying and expressing inner feelings, might somehow affect the course of various illnesses. However, none of these studies have distinguished between an impact of alexithymia on actual pathophysiological change versus an impact only on illness behavior. In the present ...
Lim R - - 1994
OBJECTIVE: To examine how exercise testing on background medical treatment affects the ability of the test to predict prognostically important patterns of coronary anatomy in patients with a high clinical probability of coronary artery disease but who are well controlled on medication. DESIGN: Prospective study. SETTING: Regional cardiothoracic centre and ...
Camici P G - - 1994
Several studies have shown that coronary vasodilator reserve is impaired in some patients with chest pain and angiographically normal coronary arteries. In a subgroup of these patients, who additionally show ST depression on the electrocardiogram during exercise and are generally labelled as having Syndrome X, the impairment of coronary flow ...
Mark D B - - 1994
Risk assessment is a central activity in virtually all aspects of the examination and treatment of patients. Methods to standardize this process and improve its accuracy can only improve the quality of medical care. Since health care is undergoing reform in this country, it seems likely that physicians will increasingly ...
- - 1994
Exercise training improves functional capacity and reduces clinical symptoms in patients with coronary artery disease. However, such patients are at increased risk for cardiovascular complications during exercise; therefore, appropriate safeguards should be employed to minimize these risks. Based on the documented benefits and risks of exercise for patients with coronary ...
Duncker D J - - 1994
We examined the impeding effects of exercise on coronary blood flow by analyzing exercise-induced changes in the pressure-flow relationship during maximal coronary vasodilation with adenosine in chronically instrumented dogs and assessed the individual contributions produced by heart rate, contractility, and alpha 1-adrenergic vasoconstriction. Treadmill exercise that increased heart rate from ...
Froelicher V - - 1994
Treadmill and clinical data were gathered prospectively on consecutive patients who underwent exercise testing for evaluation for coronary artery disease in a 1,200 bed Veterans Affairs Medical Center. From 3,609 men referred for exercise testing from 1984 to 1990, 3,134 patients remained after excluding those with significant valvular heart disease ...
Lin H - - 1994
BACKGROUND: Both plasma potassium ([K]) and epinephrine concentrations have been known to increase during exercise and decrease rapidly shortly after exercise; in addition, it is also known that exercise can promote coronary thrombosis in human and animal subjects. Many studies have shown that epinephrine has a stimulatory effect on coronary ...
Morise A P - - 1994
To determine the independent incremental value of exercise capacity (METS) concerning the presence and extent of coronary artery disease, we analyzed data from 800 patients with suspected coronary disease who underwent both exercise testing and coronary angiography. We performed logistic regression analysis of clinical and exercise test data with an ...
Altman J D - - 1994
OBJECTIVE: The aim was to test the hypothesis that nitric oxide (or a related compound) contributes to the coronary vasodilatation during physiological increases of myocardial O2 consumption that occur with exercise. METHODS: Active hyperaemia associated with graded treadmill exercise and coronary reactive hyperaemia were examined in chronically instrumented awake dogs ...
Borges-Neto S - - 1994
BACKGROUND: The purpose of this investigation was to compare the magnitude of change in myocardial perfusion and function during exercise with that obtained during total coronary artery occlusion. Radionuclide studies are widely used for the diagnosis and determination of prognosis in patients with suspected or known coronary artery disease. These ...
Pashkow F J - - 1994
BACKGROUND: Evaluation of patients with possible coronary artery disease is a challenge to clinicians who face conflicting pressures in the current practice environment. Sensitivity, accuracy, cost, and access have become considerations in the appropriate selection of diagnostic studies. OBJECTIVE: To review and compare the strengths and shortcomings of commonly employed ...
Kawaguchi T - - 1994
Forty-two patients with angiographically documented left main coronary artery (LM) disease (luminal occlusion > or = 50%) and 30 patients with left main equivalent (LMEQ) disease (> or = 70% luminal occlusion of both the proximal left anterior descending artery and proximal left circumflex artery) were studied to determine the ...
Juneja R - - 1994
No reasonable guidelines exist for evaluating an asymptomatic individual (without evidence for ischemic heart disease on history or electrocardiography) with a positive exercise ECG. Available data indicate that persons with a strongly positive test should undergo a coronary angiography. In persons with mild to moderately positive results, cinefluoroscopy is indicated ...
Michaelides A - - 1993
The objective of this study was to investigate the effect of myocardial ischemia on the QRS duration in patients with coronary artery disease since acute myocardial ischemia decreases conduction velocity through the ischemic myocardium and may produce QRS prolongation on the surface electrocardiogram. One hundred fifty patients who underwent cardiac ...
Seiler C - - 1993
BACKGROUND: It has been shown that there is impairment of the vasodilatory response to acetylcholine in patients with hypercholesterolemia and angiographically normal coronary arteries. Moreover, in patients with angiographically smooth coronary arteries, the number of coronary risk factors is associated with a loss of endothelium-dependent vasodilation. The purpose of the ...
Kawaguchi T - - 1993
BACKGROUND: The objective of this study was to determine whether coronary angiographic findings and survival could be predicted using standard clinical and exercise-test data. METHODS: Five hundred and ninety-five men who had undergone both exercise treadmill testing and cardiac catheterization were followed for up to 5 years. Left main (LM) ...
Wang J - - 1993
Whether endothelium-derived relaxing factor (EDRF)/nitric oxide (NO) plays a role in the dilation of the left circumflex coronary artery during acute exercise and whether endothelium-mediated dilation of this artery is altered after chronic exercise training have not been determined previously. Nine dogs were chronically instrumented for measurements of systemic hemodynamics, ...
Tamesis B - - 1993
The Asymptomatic Cardiac Ischemia Pilot (ACIP) and modified ACIP treadmill exercise protocols were developed to test patients with coronary artery disease and to linearly increase work load between stages. The physiologic changes that occurred with ACIP and modified ACIP were compared to those with the Bruce and Cornell protocols in ...
Hambrecht R - - 1993
OBJECTIVES: This study was designed to define the effect of different levels of leisure time physical activity on cardiorespiratory fitness and progression of coronary atherosclerotic lesions in unselected patients with coronary artery disease. BACKGROUND: It has been shown in various studies that regression of coronary atherosclerotic lesions can be achieved ...
Koyanagi A - - 1993
Healthy male and female adults who visited the Japanese Red Cross Health Care Center were undertaken to the study of hematological examination, blood chemistry, electrocardiography and exercise loading test by bicycle ergometer. We attempted to evaluate the medical check up system for decision making of exercise prescription and useful exercise ...
Drieu la Rochelle C - - 1993
The effects of celiprolol (1 mg/kg), a selective beta 1-adrenoceptor antagonist with partial agonist activity (PAA), on large and small coronary arteries and on systemic hemodynamics were investigated and compared with those of atenolol (1 mg/kg) and saline at rest and during three levels of treadmill exercise in the same ...
Fletcher B J - - 1993
Activity progression of persons with physical disabilities and accompanying cardiovascular disease in medical rehabilitation centers is traditionally based on cardiac precautions derived from acute care settings. Concern that these guidelines were too conservative and restrictive led to exercise testing and evaluation of 64 physically disabled male patients with a history ...
Morrow K - - 1993
OBJECTIVE: To develop prediction rules from clinical and exercise test data identifying patients at high and low risk for cardiovascular events among a group of male veterans. DESIGN: Prognostic study with prospective gathering of data and routine follow-up of consecutive patients referred for exercise testing. Patients only underwent noninvasive evaluation ...
Goetz C G - - 1993
We studied 10 regular exercising men with Parkinson's disease on levodopa (LD) under two conditions--no exercise and vigorous exercise started 1 hour after LD ingestion. We compared LD levels and motor scores on the Unified Parkinson's Disease Rating Scale (UPDRS). There was a high degree of agreement between plasma LD ...
Fletcher G F - - 1993
This article has related the value of exercise in preventing coronary atherosclerotic heart disease. This disease is multifactorial in origin and is prevented primarily by modifying risk factors. Proper exercise does not imply high-level physical fitness or conditioning; it may be occupational or leisure-time activity, recreational activity, or regular aerobic ...
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