Search Results
Results 301 - 350 of 515
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Williams M J - - 1994
This study compares the accuracy of the routine exercise electrocardiogram, exercise score, and exercise echocardiography for the diagnosis of coronary artery disease (CAD) in women. Seventy women with a pretest probability of 53 +/- 30% for CAD were stressed using a maximal symptom-limited bicycle exercise protocol. Significant ST-segment change was ...
Abhyankar A D AD Department of Cardiology, LTM Medical College & Hospital, - - 1994
The significance of ST depression occurring during exercise treadmill stress test has been well established. However, at times there may be no ST segment changes during exercise with changes occurring during the recovery phase. Out of the 1234 patients who underwent exercise stress test, 17 patients had ST segment changes ...
Heaton K W - - 1994
Forty-seven patients (ages 17-74 years, 33 women) who had irritable bowel syndrome and who attended a gastroenterology clinic had their whole-gut transit time (WGTT) assessed by an abdominal radiograph after ingesting 20 radioopaque markers on 4 consecutive days. Immediately afterward, the patients completed a questionnaire that asked about their stool ...
Wenger N K - - 1994
Exercise rehabilitation of elderly patients with coronary artery disease (CAD) can improve physical work capacity and endurance, prolong an active life-style, and retard disability and dependency. Exercise can further favorably affect psychosocial status. With only modest modification of the guidelines used at younger ages, low to moderate intensity exercise rehabilitation ...
Felder L - - 1994
BACKGROUND: The clinical significance of coronary flow reserve (CFR) was evaluated after pharmacological (papaverine) and physiological (exercise) vasodilation in patients with coronary artery disease (CAD). METHODS: CFR was determined using parametric imaging in 10 patients with normal coronary arteries (group 1) and in 10 with CAD (group 2). Contrast density ...
Myers J - - 1994
Recent investigations suggested that clinical exercise testing can be optimized by individualizing the protocol, depending on the purpose of the test and the subject tested. This requires some knowledge of a patient's exercise capacity before beginning the test. The accuracy of a simple physical activity questionnaire and readily available clinical ...
Radice M - - 1994
Two exercise tests, one under basal conditions and one after sublingual nitroglycerin (NTG), were performed in 39 patients with stable angina pectoris--16 with critical coronary stenoses and 23 with normal coronary arteries (syndrome X). Under basal conditions, times at ischemic threshold, at peak exercise, and at complete ECG recovery were ...
Sylvén C - - 1994
Variance electrocardiogram (ECG) is a newly developed method by which resting ECG is registered with 24 leads during 220 beats. The temporal beat-to-beat QRS microamplitude variability is computed and a nondimensional diagnostic variance ECG coronary artery disease (CAD) index is derived from it. Consecutive outpatients (n = 160) were referred ...
Muchnik C - - 1994
The recognition of speech events depends, among other factors, on the resolution function. The present study was conducted to evaluate the auditory temporal resolution function in cochlear implant (CI) subjects by a gap detection threshold (GDT) test. Fourteen postlingual deaf subjects who used the Nucleus 22 Channel CI system participated ...
Clifford J C - - 1994
This study examined the influence of a provocative dynamic exercise maneuver on nerve conduction studies (NCS) in three study groups: Group A, controls (n = 10); Group B, patients with clinical carpal tunnel syndrome (CTS), but normal NCS (n = 10); and Group C, patients with clinical CTS and abnormal ...
Cohen J L - - 1993
There has been no study comparing the efficacy of dobutamine and exercise echocardiography in detecting coronary artery disease (CAD) or their physiologic effects at ischemic threshold in the same group of patients. To accomplish this, 52 patients presenting for coronary angiography underwent supine ergometer exercise and dobutamine echocardiography. Compared with ...
Bigi R - - 1993
The agreement between the results of standard ECG (CX) and cardiopulmonary (CPX) exercise stress tests performed in randomized sequence was evaluated in 40 patients with known coronary artery disease but who were not taking cardioactive therapy. Systolic blood pressure and heart rate were significantly higher during CPX only at low ...
Walling A D - - 1993
BACKGROUND: The frequent occurrence of false-positive results of standard electrocardiographic (ECG) treadmill exercise testing in women limits its diagnostic value. In men, a commercially available computer-derived treadmill exercise score (TES), which quantifies the exercise ECG, has been reported to have high diagnostic accuracy. The purpose of this study was to ...
Nowak J - - 1993
Variance electrocardiography (variance ECG) is a new resting procedure for detection of coronary artery disease (CAD). The method measures variability in the electrical expression of the depolarization phase induced by this disease. The time-domain analysis is performed on 220 cardiac cycles using high-fidelity ECG signals from 24 leads, and the ...
Miyahara T - - 1993
To determine whether the postexercise systolic blood pressure (SBP) response is a useful marker of left ventricular filling abnormalities, supine leg exercise testing was conducted in 14 control subjects and 70 patients with coronary artery disease (CAD). An abnormal postexercise SBP response (the ratio of SBP after 3 min of ...
Sjöberg B J - - 1993
Aortic ultrasound Doppler recordings of stroke volume, maximal flow velocity, and acceleration can be used to assess central hemodynamic effects of exercise in coronary artery disease (CAD) and left ventricular dysfunction. We wanted to evaluate the time course and amplitude of changes in aortic Doppler ultrasound parameters in women during ...
Klein J - - 1993
To assess the prevalence and functional significance of ischemic ambulatory ECG responses, we prospectively performed ambulatory ECG monitoring in 244 patients (mean age 61 +/- 10 years) referred for stress redistribution thallium 201 myocardial perfusion scintigraphy. The prevalence of ST-segment depression during ambulatory ECG was 33% among patients with a ...
Yamada Y - - 1993
Arterial and coronary sinus differences (A-S) of alanine, glutamate, isoleucine, leucine, valine and phenylalanine were measured in 7 control subjects and 12 patients with coronary artery disease (CAD) at rest and during exercise, and in 8 controls and 21 CAD patients at rest and during pacing. Lactate, great cardiac vein ...
Koley K C - - 1993
3000 routine ECGs were screened during a 2 year period in Armed Forces personnel reporting for annual medical examination. 90 asymptomatic men with minor ST segment and T wave changes at rest were assessed by exercise ECG. 33 responded abnormally. They were subjected to coronary arteriography. 14 subjects were confirmed ...
Wilson R A - - 1993
A multicenter study was performed to compare the diagnostic accuracy of a new technique, seismocardiography, with that of electrocardiography for physiologically and anatomically significant ischemic coronary artery disease (CAD) during exercise stress testing. Five participating centers enrolled 129 patients who had simultaneous seismocardiograms and 12-lead electrocardiograms at the time of ...
Oosterhuis W P - - 1993
The additional diagnostic yield of exercise 201Tl scintigraphy using both visual and quantitative analysis was determined in 221 patients with known or suspected coronary artery disease (CAD). The coronary arteriogram was adopted as the gold standard. After pretest clinical and exercise electrocardiographic data were taken into consideration, scintigraphy added diagnostic ...
Lu Z Y - - 1993
The index of exercises-induced amplitude changes in a combination of Q, R and S waves, named Athens score, was tested in 213 patients, who underwent coronary angiography within 3 days of a maximal exercise test. Of the 155 cases with conclusive exercise test results, according to the coronary angiography document, ...
Kaaja R - - 1993
The value of manual ECG-monitored exercise test was studied in 58 patients (39 men and 19 women) with intermittent claudication scheduled for abdominal or peripheral vascular surgery. There was a high incidence of well-known risk factors (hypercholesterolemia, smoking, and hypertension) in men and women. History of coronary artery disease (CAD) ...
Miyakoda H - - 1992
In order to investigate the relationship between sympathetic activity and postexercise systolic blood pressure (SBP) and exercise-induced ventricular arrhythmias in patients with coronary artery disease (CAD), we studied 38 patients and 9 normal subjects who underwent treadmill testing. Peak pressure-rate product was similar in the 2 groups. The plasma concentrations ...
Huang P J - - 1992
Exercise thallium-201 imaging using single-photon emission computed tomography (SPECT) was evaluated in 154 patients with angiographically documented coronary artery disease (CAD) and in 25 normal subjects. Of the 154 patients with CAD, 134 (87%) had abnormal thallium images. By contrast, only 77 (50%) patients had ischemic ST-segment depression (p < ...
Amanullah A - - 1992
To evaluate the safety and diagnostic value of early symptom-limited exercise electrocardiography (ECG) and exercise thallium-201 single photon emission computed tomography (SPECT) in unstable angina (UA), 39 patients were studied prospectively soon after stabilization on medical treatment. No patient had a history of myocardial infarction (MI) or revascularization and patients ...
Wilson D A - - 1992
The incremental diagnostic value of exercise electrocardiographic testing compared with clinical data alone in the diagnosis of coronary artery disease (CAD) was found to be of limited value in a previous study. That study used a computer algorithm for diagnosing disease. Thus, the strict use of the results apply only ...
Pliml W - - 1992
There is no established treatment specifically aimed at protecting or restoring cardiac energy metabolism, which is greatly impaired by ischaemia. Even after reperfusion, myocardial content of ATP remains low for more than 72 h. Long-term post-ischaemic dysfunction and irreversibility of ischaemic damage have been associated with low ATP content. Evidence ...
Ironson G - - 1992
This study examined the comparative potency of several psychological stressors and exercise in eliciting myocardial ischemia as measured by left ventricular (LV) ejection fraction (EF) changes using radionuclide ventriculography. Twenty-seven subjects underwent both exercise (bicycle) and psychological stressors (mental arithmetic, recall of an incident that elicited anger, giving a short ...
Leaseburge L A - - 1992
Liver test abnormalities are a well-recognized complication in the parenterally fed population. Numerous etiologies for the development of elevated liver tests have been suggested. However, the etiology and clinical significance remain unclear. The aim of this retrospective study was to determine the extent of liver-associated test (LAT) abnormalities in patients ...
Christian T F - - 1992
The ability of exercise thallium-201 tomographic imaging to predict the presence of left main or 3-vessel coronary artery disease (CAD) was examined in 688 patients who underwent both exercise thallium-201 testing and coronary angiography. Significant differences existed for multiple variables between patients with (n = 196) and without (n = ...
Iskandrian A S - - 1992
Hypotension during exercise testing has been considered a marker of extensive coronary artery disease (CAD) and poor prognosis. The mechanism of hypotension was examined in 25 CAD patients who developed hypotension during treadmill exercise testing (mean decrease in systolic blood pressure [BP] 33 +/- 13 mm Hg) (group 1) and ...
Amanullah A M - - 1992
The diagnostic and prognostic value of predischarge exercise echocardiography (echo) was assessed prospectively in 36 patients with unstable angina soon after stabilization on medical treatment. Two-dimensional echo was performed at rest and immediately after a symptom-limited exercise test. Patients with previous myocardial infarction, coronary revascularization, left bundle-branch block and dilated ...
Avery P G - - 1992
Technetium-99m-methoxy-isobutyl-isonitrile (MIBI) is a myocardial perfusion agent which allows simultaneous assessment of left ventricular function. We evaluated left ventricular (LV) function with exercise using a new method of myocardial profiling in 43 patients with chest pain. Twenty-eight had significant coronary artery disease and 15 were normal on coronary angiography. Results ...
Mangete E D - - 1992
Seven patients with varying degrees of paradoxical chest wall movement (flail chest) were managed conservatively at the University of Port Harcourt Teaching Hospital with frusemide, methylprednisolone, non administration of crystalloid fluids and limitation of fluid intake. Patients showed considerable improvement within the first 24-48 hours which was sustained throughout the ...
Lavie C J - - 1992
The risks and benefits of regular aerobic exercise have been studied extensively. Because of the potential risks, we believe that sedentary persons over age 40 who have cardiac risk factors, as well as patients with coronary artery disease (CAD), should have a complete physical examination and probably an exercise electrocardiogram ...
Myrianthefs M M - - 1991
The maximal P-wave duration in all time-aligned leads, and the maximal P-wave amplitude in leads V5 and V6 were measured on a 12-lead, signal-averaged electrocardiogram during the recovery period of an exercise stress test (EST). The study group consisted of 75 patients with coronary artery disease (CAD) documented by greater ...
Stratmann H - - 1991
Multiple measurements of pulmonary function were performed during exercise testing in 29 patients with coronary artery disease (CAD) before and after exercise training. Following training, significant increases in oxygen consumption (VO2), carbon dioxide production (VCO2), and peak flow at maximal exercise were seen as compared with pretraining values (p less ...
Brull S J - - 1991
The influence of current intensity on visual assessment of fade in response to train-of-four (TOF) and two modes of double-burst stimulation (DBS) was determined to assess the utility of low-current neurostimulation. Each of 150 sets of assessments (in 51 patients) included a mechanographic TOF at 60 mA followed by visual ...
Dunn R L - - 1991
We designed this study to identify patients with coronary artery disease (CAD), employing the exercise tolerance test, and to develop further criteria for ordering the exercise tolerance test in the preventive medicine population of the Cleveland Clinic Foundation. During 1987-1988 1,930 patients not known to have CAD were referred from ...
Kurata C - - 1991
Certain patients with coronary artery disease (CAD) may have neither ST depression nor chest pain during exercise despite the presence of myocardial ischemia. The frequency and characteristics of such electrocardiographically and symptomatically silent ischemia were studied in 171 patients with both angiographically documented CAD and scintigraphically documented ischemia. Fifty-six (33%) ...
Fisman E Z - - 1991
Doppler-derived parameters of aortic flow were examined during heavy isometric exercise in 48 men with coronary artery disease (CAD) and in 48 gender- and age-matched healthy controls. The aim was to determine which parameters best separated the groups and to look for a possible relation between exercise-induced Doppler patterns and ...
Burns R J - - 1991
Reduced septal uptake of thallium-201 during exercise is frequently observed in patients with left bundle branch block (LBBB) and normal coronary arteries. This may reflect normal coronary autoregulation in response to lower septal oxygen demand; thus, dipyridamole, which uniformly exploits flow reserve, would be more accurate for diagnosis of coronary ...
Zoghbi W A - - 1991
Two-dimensional echocardiography combined with exercise is sensitive and specific in the detection of coronary artery disease (CAD) by demonstrating transient abnormalities in wall motion. Frequently, however, patients cannot achieve maximal exercise because of various factors. Pharmacologic stress testing with intravenous adenosine was evaluated as a means of detecting CAD in ...
Borges-Neto S - - 1991
Although there is widespread use of exercise thallium 201 scintigraphy and radionuclide angiocardiography in patients with coronary artery disease (CAD), little is known about the independence, concordance, or relative importance of these studies in the diagnosis, prognosis, and assessment of the outcome of therapy. The use of both tests in ...
Hagberg J M - - 1991
Exercise training elicits numerous beneficial adaptations in patients with coronary artery disease (CAD), but until 10 yr ago these adaptations were generally believed to be peripheral adaptations rather than improvements in myocardial blood supply. However, animal models of CAD have been shown to elicit improvements in myocardial blood flow and ...
Simari R D - - 1991
The ability of supine exercise electrocardiography and exercise radionuclide angiography to predict time to subsequent cardiac events (cardiac death, nonfatal myocardial infarction or late coronary bypass grafting or angioplasty) were compared in 265 patients with normal resting electrocardiograms who were not taking digoxin. All patients had undergone coronary catheterization and ...
Fedele F - - 1991
To evaluate whether endogenous opioids (EO) play a role in the perception of anginal pain, a randomized double blind clinical trial, using naloxone (N) and placebo (P) and measuring beta-endorphin (beta-ep) plasma levels, was performed. We studied 10 patients with angiographically assessed coronary artery disease (CAD) and stable exercise-induced myocardial ...
Barlow C W - - 1991
Flight surgeons recognize that ongoing vigilance is necessary to detect coronary artery disease (CAD) in aircrew. Regular physical examinations with only a resting electrocardiogram, albeit having a very low predictive value for detection of CAD in asymptomatic subjects, are now widely practised. Routine stress electrocardiography has been criticized for yielding ...
Yamaguchi K - - 1991
In a nationwide prospective study of adverse reactions to intravenous contrast media (CM), the Japanese Committee on the Safety of Contrast Media compared high-osmolar ionic CM with low-osmolar nonionic CM. A total of 337,647 cases were analyzed. The reliability of pretesting with an intravenous injection of a small amount of ...
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