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Results 601 - 650 of 844
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Rosing D R - - 1987
Because the long-term anatomic effects of percutaneous transluminal coronary angioplasty are unknown, follow-up evaluations including coronary angiography, treadmill exercise testing and rest and bicycle exercise radionuclide angiography were performed in 46 patients 6.3 +/- 2.0 and 37.6 +/- 3.6 (mean +/- SD) months after they had undergone successful single lesion ...
Armstrong W F - - 1986
Two-dimensional echocardiograms were done during rest and after exercise in 95 patients who subsequently had coronary arteriography. Prior myocardial infarction was present in 36 patients, 35 of whom had wall motion abnormalities. There was no evidence of prior infarction in 59 patients, 44 of whom had coronary disease. In these ...
Chaitman B R - - 1986
The exercise electrocardiogram has been the subject of intense research over the last 50 years, as both a diagnostic and prognostic method to assess patients with chronic ischemic heart disease. In 1986, the strengths and limitations of the technique to predict coronary and multivessel disease in clinical patient subsets are ...
Di Pasquale G - - 1986
A prospective cardiologic evaluation was performed in 83 consecutive patients with transient cerebral ischemia or mild stroke and without symptoms or electrocardiographic signs of ischemic heart disease. Patients were studied with an electrocardiographic exercise test; a positive test was followed by exercise Thallium-201 myocardial scintigraphy. Results were compared to those ...
Imperi G A - - 1986
A positive exercise study in an asymptomatic patient presents a clinical dilemma. Many of these asymptomatic positive studies are false-positive, but a subset of these patients have silent coronary artery disease. Other noninvasive tests can be used in conjunction with exercise testing to help identify this subset of patients, but ...
Weiner D A - - 1986
To determine whether exercise testing can identify patients whose survival might be prolonged by coronary artery bypass surgery, the results of bypass surgery were compared with those of medical therapy alone in 5,303 nonrandomized patients from the Coronary Artery Surgery Study registry who underwent exercise testing. Patients in the two ...
Hlatky M A - - 1986
Exercise testing has proven value for the diagnosis of cardiac disorders in symptomatic patients and for the objective measurement of functional capacity. Use of exercise tests to screen for cardiac disease in asymptomatic persons remains controversial because of the low prevalence of disease in the population tested, the different characteristics ...
Sugishita Y - - 1986
In 21 patients with typical exercise-induced anginal pain but normal coronary arteriograms (group N) and in 14 patients with angiographically proved coronary stenosis (group C), symptom-limited ergometer exercise ECG and radionuclide angiocardiography were performed twice on two different days. Exercise-induced ST changes showed larger variations between the two exercise tests ...
Avogaro P - - 1986
The behavior of plasma lipid peroxides, expressed as plasma malondialdehyde, was studied in 27 patients with documented coronary artery disease and 17 volunteers without coronary artery disease (henceforth designated "normal"), after a standardized exercise on a bicycle ergometer. In the control group, the basal values of malondialdehyde were significantly lower ...
Raberger G - - 1986
An experimental model of treadmill exercise-induced regional myocardial dysfunction was developed in conscious dogs to mimic exertional angina pectoris in man. Twenty mongrel dogs, trained to run on a treadmill, were chronically instrumented with a miniature pressure transducer in the left ventricle and a hydraulic occluder placed around the circumflex ...
Rautaharju P M - - 1986
The prognostic value of the exercise electrocardiogram was examined in the 6,438 usual care men of the Multiple Risk Factor Intervention Trial in relation to fatal and nonfatal coronary heart disease events, rest electrocardiographic abnormalities and coronary heart disease risk factors. An abnormal response to exercise, defined as an ST ...
Coplan N L - - 1986
Exercise performance is determined by the interaction of many systems. Cardiac disease, non-cardiovascular pathology, physical training, and the hemodynamic response to the type of exercise the patient wants to perform should all be considered when developing an exercise prescription. There are two stages for deriving a complete exercise prescription, determination ...
Swahn E - - 1986
The safety of and the diagnostic information provided by a predischarge exercise test performed 2-7 days after admission to the coronary care unit (CCU) was evaluated in 400 patients less than 65 years of age with suspected unstable coronary artery disease, i.e. probable or definite non-transmural myocardial infarction, progressive angina ...
Kraemer H C - - 1986
A measure of 2 x 2 association, Z, is developed having the property that n(Z - Z) has approximately a standard normal distribution, even for quite small sample size. Examples of the use of this variance-stabilizing and normalizing transformation in planning studies of 2 x 2 association are presented. Studies ...
Gage J E - - 1986
To study the vasomotility of normal and diseased coronary arteries during dynamic exercise, symptom-limited supine bicycle exercise during cardiac catheterization was performed by 18 patients with classic angina pectoris. The cardiovascular response was assessed by hemodynamic measurements and computer-assisted determination of normal and stenotic coronary artery luminal areas from biplane ...
Dai X Z - - 1986
Studies were performed to compare the effects of alpha 1-adrenergic blockade with indoramin and nonselective alpha-adrenergic blockade with phentolamine on coronary blood flow and myocardial oxygen consumption during exercise. Nine dogs trained to run on a motor-driven treadmill were instrumented with electromagnetic flowmeter probes on the left circumflex coronary artery, ...
Cutler B S - - 1986
The prevalence of severe coronary artery disease in peripheral vascular patients exceeds 50 per cent. It is therefore not surprising that complications of coronary artery disease are the most common causes of mortality following peripheral vascular operations. If the incidence of cardiac complications is to be reduced, it is first ...
Becker G J - - 1986
The potential impact of local intracoronary infusion of streptokinase (SK) on vascular prostaglandin synthetic pathways was studied in a canine model. Control animals (n = 10) underwent left coronary artery (LCA) infusion of 50,000 units SK for 90 minutes; experimental animals (n = 10) underwent LCA infusion of normal saline. ...
Balu V - - 1986
Between May 1976 and December 1982 (104 months), 152 patients from a total of 3592 patients who had coronary angiography at the Buffalo Veterans Administration Medical Center had coronary artery disease with left ventricular ejection fractions of 40% or below. Sixty-three patients in this group had coronary bypass surgery. Thirty ...
Maddahi J - - 1986
The capabilities of visual and quantitative analysis of stress redistribution thallium-201 scintigrams, exercise electrocardiography and exercise blood pressure response were compared for correct identification of extensive coronary disease, defined as left main or triple vessel coronary artery disease, or both (50% or more luminal diameter coronary narrowing), in 105 consecutive ...
Butman S M - - 1986
To evaluate the safety and diagnostic use of exercise testing in patients with unstable angina, 78 patients underwent submaximal exercise testing and diagnostic cardiac catheterization early after stabilization of their pain. Thirty-six patients (46%) had a positive exercise test manifested as angina or ST segment depression of greater than or ...
Rasmussen K - - 1986
We studied the exercise stress test and the coronary artery tone in two groups of angina patients with comparable coronary atherosclerosis. Group I (20 males and 5 females, mean age 53.5 years) with a positive, and group II (22 males and 3 females, mean age 52.5 years) with a negative ...
Weiner D A - - 1986
Most patients who are considered candidates for coronary angioplasty should have objective evidence of myocardial ischemia confirmed before the procedure, if clinically possible. In patients with progressive unstable angina, for whom exercise testing is inappropriate, the location of transient resting ECG changes should be looked for on the 12-lead ECG. ...
Gutin B - - 1986
Exercise electrocardiography (ECG) is widely employed for diagnosis of coronary heart disease (CHD) and for assessment of aerobic fitness prior to starting an exercise training program. This study surveyed stress testing centers in New York City (NYC) to determine practices currently used and to compare these practices with those suggested ...
Buttrick P M - - 1985
To evaluate the relationship between the physiological cardiac hypertrophy associated with physical training and the increases in vascular capacitance associated with this stimuli, male and female rats trained by a swimming program were studied. Both sexes were used so that the coronary vascular response to exercise could be studied in ...
Thomas D P - - 1985
Histological and ultrastructural evaluation of the heart reveals that structural alterations may be induced by both acute and chronic exposure to exhaustive exercise. Following an acute bout of exercise to the point of exhaustion, the normal heart does not appear hypoxic as assessed by mitochondrial morphology. However, small shifts in ...
Cohen M V - - 1985
To examine the effects of coronary collateral development on thallium-201 (201Tl) distribution the left circumflex coronary artery was ligated in eight dogs. Three days later these animals ran on a treadmill, and 201-thallous chloride was injected into the right atrium at peak exercise. Scintigraphic scanning was begun within 10 min ...
Cantwell J D - - 1985
Running is an excellent means of conditioning the cardiovascular system. It is a highly aerobic activity that utilizes both fatty acids and carbohydrates for energy. The typical runner tends to have a slow resting pulse rate and a high maximal oxygen consumption. Echocardiographic studies show that distance runners have larger, ...
Iskandrian A S - - 1985
Rest and exercise radionuclide angiography is a useful technique to study the cardiac adaptation during exercise in patients with coronary artery disease. Most patients with coronary artery disease have an abnormal EF response to exercise, although the magnitude of the change in EF may not correlate with the extent of ...
Hollenberg M - - 1985
A computer-derived treadmill exercise score that quantifies the electrocardiographic response to exercise has been reported to have a high sensitivity (87 per cent) and specificity (92 per cent) in patients with a high prevalence of coronary artery disease. To test its accuracy in young, asymptomatic men with a low prevalence ...
Carboni G P - - 1985
To enhance diagnostic accuracy in coronary artery disease, cardiac cinefluoroscopy for the detection of coronary artery calcification was combined with exercise test and ambulatory ST-segment monitoring in 104 symptomatic patients before they underwent coronary angiography. In 44 patients with typical angina the combination of the three noninvasive tests and the ...
Neill W A - - 1985
We studied 100 men with clinically stable coronary heart disease. Their capacity for exertion as defined by treadmill test was compared with the physical and social avocational activities they carried out in their daily routine, as reported by them. Exercise capacity (treadmill time) was strongly correlated with a physician's independent ...
Weiner D A - - 1985
To determine the diagnostic accuracy of cardiokymography, recorded 2 to 3 minutes after exercise, 617 patients undergoing cardiac catheterization were evaluated from 12 participating centers using a standardized protocol. Adequate cardiokymographic tracings, which were obtained in 82% of patients, were dependent on the skill of the operator and on certain ...
Eichner E R - - 1985
Both alcohol and exercise have been said to protect against coronary heart disease. The epidemiologic data suggest exercise, per se, does, but alcohol, per se, does not protect against coronary heart disease. Recent longitudinal data suggest teetotalers, especially those who have never smoked, have the lowest coronary heart disease mortality ...
Campbell R W - - 1985
A strategy for the diagnosis of ischemic heart disease should be based on knowledge of the prevalence of the disease in population subgroups. Asymptomatic patients should not be routinely screened. Asymptomatic patients or patients with nonanginal chest pain should have both a positive exercise electrocardiogram and stress nuclear scan before ...
Van der Wall E E - - 1985
In 52 patients with coronary artery disease the feasibility of performing first-pass cardiac studies with the short-lived tracer 195mAu was tested. Even with a currently available gamma camera, good results were obtained in terms of imaging quality, reproducibility and exercise response. The use of a multicrystal camera would, however, be ...
Koshu M - - 1985
The effects of orally administered dilazep, an antianginal drug, on the hemoglobin-oxygen affinity were studied in 31 cases with ischemic heart disease. Prior to medication, the mean P50 value was 29.2 +/- 1.65 mmHg. There were no significant differences in the P50 value according to the age of patient or ...
Parks C M - - 1985
In recent years, increasing attention has been focused on the physiological responses of the horse to maximal exercise. Cardiovascular response in near maximally exercised galloping ponies (heart rate 225 +/- 7 beats/min; whole body oxygen consumption 122 +/- 12 ml/min/kg) comprised a marked increase in blood flow to the cerebellum, ...
Wisenberg G - - 1985
As an agent potentially capable of inducing ischemia in patients with coronary artery disease, dopamine administered intravenously was evaluated as a pharmacologic stress agent by supine radionuclide angiography, and the results were compared with ergometer exercise. In a preliminary group of 11 subjects (4 normal subjects and 7 patients with ...
Gutin B - - 1985
On the basis of previous findings, it has been hypothesized that hyperestrogenemia may be the major predisposing factor for coronary heart disease and that an elevation in the estradiol-to-testosterone ratio, or a closely related hormonal alteration, may cause the expression of risk factors for coronary heart disease. The present study ...
Gardine R L - - 1985
Eighty-six patients presenting with lower extremity pain on exertion underwent treadmill peripheral arterial stress testing with simultaneous cardiac monitoring. Of these patients 19 went on to have vascular reconstruction. Cardiac monitoring of peripheral arterial stress testing is a sensitive method of revealing occult cardiac disease in these high risk patients. ...
Roy L - - 1985
Nafazatrom (Bay G 6575) is a novel antithrombotic compound, which acts by stimulation of prostacyclin as well as by inhibition of lipoxygenase enzymes. To determine its effects on exercise performance in coronary artery disease patients, a double-blind study was conducted. Twenty patients with coronary artery disease underwent an exercise stress ...
Pamelia F X - - 1985
The goal of this study was to determine the prognostic value of a normal exercise thallium-201 (TI-201) scintigram by quantitative criteria in a consecutive series of 349 patients with chest pain. Follow-up was obtained in 345 patients (99%) from 8 to 45 months (mean 34 +/- 7). Of these, 60% ...
Haraphongse M - - 1985
Abnormalities of the 12 lead electrocardiogram (ECG) are often used to localize the anatomic site of myocardial ischemia and vessel involvement in patients (pts) with coronary artery disease. This study is to determine if ischemia of specific vascular segments can be identified by exercise induced ST segment depression (STD) on ...
Yamabe H - - 1985
Forty-seven patients with coronary artery disease characterized by angina pectoris and/or old myocardial infarction underwent two maximal exercise tests, the supine ergometer test and the upright treadmill test, to study the relationship between exercise capacity and exercise hemodynamics. Subjects were divided into 3 groups: Group I (n = 19) achieved ...
Antongiovanni G B - - 1985
In a series of patients with TIA or minor stroke we have investigated the possibility of a different distribution of risk factors according to the presence or absence of angiographic lesions of the cerebral arterial circulation. The differences observed, though not statistically significant, argue for a more severe and widespread ...
Bove A A - - 1985
The effects of exercise on large coronary vasoreactivity were determined in eight dogs trained by treadmill running for 8 weeks. Six nontrained dogs comprised the control group. The trained group showed a significant reduction in heart rate during graded submaximal exercise testing when compared with the controls, and resting plasma ...
Sullivan M - - 1985
Out of 156 patients with stable coronary heart disease randomized to either an exercise intervention group or a control group, 41 had complete gas analysis data. Continuous gas exchange data, including the ventilatory threshold, and selected heart rates were determined initially and at 1 year. The mean attendance for the ...
Ernst S M - - 1985
We describe the functional and anatomical follow-up of 25 patients who underwent percutaneous transluminal coronary angioplasty in our hospital. In addition, the relative value of different non-invasive methods in predicting a restenosis in the late follow-up period is described. Before angioplasty all patients had subjective and objective signs of coronary ...
Dominiak P - - 1985
To study the difference in sympathetic activity during pacing the right atrium or during physical exercise in patients with coronary heart disease, we investigated circulating plasma catecholamine concentrations in the coronary sinus and brachial artery radioenzymatically in 11 male patients with well documented coronary artery disease. Heart rate was increased ...
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