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Results 451 - 500 of 862
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Mangschau A - - 1988
Forty two patients were studied prospectively by rest and exercise radionuclide ventriculography before and after (10 +/- 4 months) left ventricular aneurysm resection. Functional classification (NYHA) improved from 3.0 +/- 0.6 to 2.3 +/- 0.5 (p less than 0.0001) with an increase in double product (p less than 0.01) and ...
Wilson M F - - 1988
This study evaluated the role of left ventricular (LV) ejection fraction and systolic blood pressure (BP) to end-systolic volume ratio to detect symptomatic and silent myocardial ischemia. The sensitivity and diagnostic accuracy of these contractility indexes were compared with angina and ST depression during exercise. Thirty consecutive patients referred for ...
Hassan I M - - 1988
Changes in left ventricular (LV) performance between rest (Re) and exercise (Ex) in normal hearts has been analysed in great detail using various parameters (P) of radionuclide MUGA studies. Little attention was given in this regard to right ventricular (RV) performance. We developed a program on the Informatik Sims V ...
Kawasuji M - - 1988
The serial change in left ventricular function was investigated by radionuclide angiocardiography in 25 patients undergoing coronary artery bypass grafting (CABG). Multiple gated equilibrium blood pool imaging was performed at rest before, and at 1, 2 and 4 weeks after the operation and also during exercise on a supine bicycle ...
Wilson R A - - 1988
In patients with chronic aortic regurgitation the quantitative changes in loading conditions and left ventricular performance from rest to submaximal exercise have not been related to the magnitude of change observed from rest to maximal exercise. Changes in end-diastolic volume index, as a measure of preload, and measures of contractile ...
Grines C L - - 1988
To determine how coronary reperfusion affects rest and exercise ventricular function after acute myocardial infarction (AMI), 63 patients with a patent infarct artery after intravenous thrombolytic therapy (lysis) were compared with 27 patients who failed thrombolysis but had successful acute recanalization by percutaneous transluminal coronary angioplasty (PTCA) as a "rescue" ...
Sullivan M J - - 1988
We studied the effects of exercise training in patients with chronic heart failure attributed to left ventricular dysfunction (ejection fraction, 24 +/- 10%). Twelve ambulatory patients with stable symptoms underwent 4-6 months of conditioning by exercising 4.1 +/- 0.6 hr/wk at a heart rate corresponding to 75% of peak oxygen ...
Watanabe K - - 1988
Xamoterol, a beta 1-partial agonist, was given to 10 patients with idiopathic dilated cardiomyopathy in NYHA functional classes II and III. The acute and chronic effects of xamoterol were assessed by changes in effort tolerance measured by multistage bicycle ergometry, echocardiography, radionuclide ventriculography and right heart catheterization. The acute effect ...
Miller T D - - 1988
To investigate the prognostic importance of abnormal exercise left ventricular function on radionuclide angiography in the absence of significant angiographic coronary artery disease, 79 consecutive patients with these findings were followed up for a mean of 25 months (range 12 to 55). All patients had 1) an ejection fraction at ...
Peterson R J - - 1988
The capacity of the anatomic right ventricle to sustain normal function against systemic pressure long after atrial baffle procedures in patients with complete transposition of the great arteries remains unknown. Pulmonary and systemic ventricular function was measured by first-pass radionuclide studies in 11 children 7 +/- 3 years (+/- standard ...
Chan C K - - 1988
In previous research, we have demonstrated that parenterally administered terbutaline can augment resting cardiac function in patients with chronic obstructive pulmonary disease (COPD). Because the oral form of terbutaline is more widely utilized, a double-blind, randomized, crossover, placebo-controlled trial of the cardiopulmonary effects of oral terbutaline was conducted in ten ...
De Crée J - - 1988
In a subacute experiment the authors studied the effects of a fourteen -day treatment with nebivolol, 5 mg once a day, in 10 healthy male volunteers with a mean age of thirty-one, twenty-five to thirty-nine years, by comparing the results of the resting ratio of the preejection period (PEP) to ...
Sagiv M - - 1988
Hemodynamic and contractile states were studied echocardiographically in 10 young (28 +/- 3 yr) and 10 elderly (67 +/- 4 yr) male subjects at rest and during upright isometric exercise which involved the hands, hips, legs, and lower back muscle groups (deadlift) at 30% of maximum voluntary contraction for 3 ...
Findlay I N - - 1988
Isometric exercise and cold pressor stimulation have been proposed as alternatives to dynamic exercise in the evaluation of patients with coronary heart disease. We evaluated all three, by gated radionuclide ventriculography, in 13 male controls and 44 male patients with coronary heart disease. In controls, mean left ventricular ejection fraction ...
Kuecherer H F - - 1988
The purpose of this study was to assess altered left ventricular diastolic filling by noninvasive means in patients with coronary artery disease and normal systolic pump function. Mitral inflow velocity was measured by pulsed Doppler, and left ventricular volumes were obtained from cross-sectional echocardiography at rest and during upright bicycle ...
Moskowitz R M - - 1988
To test for early evidence of alcoholic cardiomyopathy and to assess changes in exercise response after abstinence, 12 asymptomatic alcoholic men (group 1) underwent maximal upright bicycle exercise radionuclide ventriculography two to six days after alcohol withdrawal. Six of these patients (group 1A) had similar testing two to four weeks ...
Taliercio C P CP Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN - - 1988
We investigated whether exercise radionuclide angiography provides prognostic information in addition to that identified by resting left ventricular function and coronary anatomy in patients with medically treated coronary artery disease. Clinical follow-up (median, 21.7 months) was obtained in 424 medically treated patients who underwent exercise radionuclide angiography and coronary angiography. ...
Musewe N N - - 1988
Discordance exists between apparently reduced systemic right ventricular function and the reported asymptomatic state of many patients after atrial repair for transposition of the great arteries. To evaluate this clinical observation, cardiopulmonary response to exercise in 17 asymptomatic patients with no significant postoperative hemodynamic abnormalities was assessed by upright bicycle ...
Fridrich L - - 1988
A total of 240 survivors of one or more myocardial infarctions were consecutively admitted to perform supine exercise radionuclide ventriculography. Within 3 years after the test, 22 died; this group was compared to an age-matched control group of 22 survivors for left and right ventricular function during rest, exercise, and ...
Stopford J L - - 1988
Static exercise is commonly encountered occupationally and in normal activities of daily living. In addition, weight training, a form of static exercise, is one of the fastest growing physical activities in the United States. Static exercise is a stressor to the cardiovascular system. At high intensities it produces immediate and ...
Lumia F J - - 1988
The long-term effects of valve replacement for chronic isolated aortic regurgitation as assessed by first-pass exercise radionuclide angiography have never been reported. We studied 20 males and 5 females before, 15 months postoperatively, and from 29 to 109 (mean 62 +/- 21) months following valve replacement with exercise radionuclide angiography. ...
Kelbaek H - - 1988
Seven healthy men, aged 21 to 30 years, were investigated by radionuclide cardiography at rest and during submaximal exercise at heavy (early) and during declining (late) alcohol intoxication. Control studies, in which alcohol was substituted by an isocaloric, isovolumic drink, were performed on a different day. The left ventricular ejection ...
Caplin J L - - 1988
Factors other than ischemia may alter right ventricular function both at rest and on exercise. Normal volunteers differ from cardiac patients with normal coronary arteries with regard to their left ventricular response to exercise. This study examined changes in right ventricular function on exercise in 21 normal volunteers and 13 ...
Partanen J - - 1988
Nine healthy volunteers were studied with echocardiography and systolic time intervals before and after administration of 1 mg digoxin intravenously at supine rest and during 3-min isometric handgrip exercise. Eight of them were also studied following autonomic blockade, atropine (0.04 mg/kg), and propranolol (0.2 mg/kg) administered intravenously, otherwise the study ...
Balfour I C - - 1988
M-mode echocardiography was performed on 11 normal black subjects and 38 patients with sickle cell anemia while they were at rest to evaluate their left ventricular (LV) systolic and diastolic function. The patients with sickle cell anemia were also evaluated by radionuclide exercise tests and, based on their ejection fraction ...
Wessale J L - - 1988
The volume of air moved into the trachea due to ventricular activity--a record of which is the pneumocardiogram (PNCG)--is always less than true stroke volume. A new method of investigating this relationship consists of inducing a known volume change (delta V in) within the thorax and measuring the volume of ...
Eisenberg B M - - 1988
77 unselected patients were examined simultaneously by impedance cardiography and radiocardiography in the recumbent position during dynamic exercise (bicycle ergometry). In all cases evaluable impedance curves were registered till the 100 W load. Stroke volume, estimated by impedance cardiography, is at rest and during exercise by about 30% lower compared ...
Kiess M C - - 1988
The left ventricular ejection fraction (EF) was studied in 17 healthy volunteers with a new ambulatory left ventricular function monitor. Heart rate, EF, and blood pressure measurements were made during rest, a psychiatric stress interview, cold exposure, exercise, and eating. An increase in EF was seen during emotional stress (from ...
Boström P A - - 1988
Working capacity, left ventricular ejection fraction (EF), stroke volume and the phase of the left ventricular contraction were tested before and after 3 weeks of atenolol treatment in 14 patients with angina pectoris and coronary insufficiency diagnosed by thallium tomography. Eight patients (group A) increased their EF during exercise and ...
Partanen J - - 1988
Sixteen healthy young volunteers were studied with echocardiography and systolic time intervals at rest and after three minutes' isometric exercise before and during autonomic blockade with atropine and propranolol. Isometric exercise increased cardiac output by raising the heart rate from 64 +/- 3 to 72 +/- 4 bpm (SEM) (p ...
Lage S G - - 1988
Thirty nine patients with cardiomyopathy were evaluated by a hemodynamic study at rest and during isotonic exercise. These patients were divided into two groups on the basis of their left ventricular ejection fraction (LVEF): A, control group (LVEF greater than 40%, N = 19); B, severe congestive heart failure group ...
Ehsani A A - - 1988
To characterize the hemodynamic abnormalities responsible for exertional hypotension coronary artery disease, we studied 11 patients with exertional hypotension during supine cycle ergometer exercise, defined as greater than 10 mm Hg decrease in systolic blood pressure during exercise, and 11 patients without exertional hypotension (controls). Patients were similar with respect ...
Bae J H - - 1989
Gated radionuclide ventriculograms were performed to evaluate cardiac function in 53 patients who received doxorubicin treatment for various malignancies (mean dose: 449 +/- 128 mg/m2 BSA). In fourteen patients (Group I) function was evaluated before and after treatment; there was a significant decrease of resting left ventricular ejection fraction after ...
Silke B - - 1987
Cicloprolol is a cardioselective beta-1 partial agonist; its haemodynamic and radionuclide (nuclear stethoscope) effects were determined in 22 patients with impaired left ventricular function due to coronary artery disease. Following a 20 min stable control period, the effects of four doses of cicloprolol (0.025, 0.025, 0.05 and 0.1 mg/kg at ...
Daley P J - - 1987
A study was performed to test the hypothesis that Doppler echocardiographic measurement of ascending aortic blood flow can detect exercise induced changes in left ventricular performance during exercise in patients suspected of having ischaemic heart disease. Acceleration and peak velocity of flow and stroke volume were determined by non-imaging Doppler ...
Clyman R I - - 1987
A model of patent ductus arteriosus in premature lambs was created to examine the lamb's ability to handle the volume load imposed by a patent ductus arteriosus and to determine the lamb's ability to handle any additional volume load. Fifteen preterm lambs [133 +/- 2 (+/- SD) days gestation, term ...
Ihlen H - - 1987
Cardiac stroke volume was measured simultaneously by Doppler echocardiography and thermodilution in patients with severe coronary artery disease. One group (20 patients) was examined during supine exercise at 25 W and a second group (20 patients) during sitting exercise at 25 W and 50 W. In a third group (10 ...
Thompson W R - - 1987
In an effort to determine left ventricular volume changes between upright rest and exercise, 15 male late post-infarction patients (group A) and 13 normal matched volunteers (group B) were studied. Patients were at least 12 months post-cardiac event. Upright two-dimensional echocardiographic recordings were performed by the same cardiac sonographer using ...
Ehsani A A - - 1987
High intensity endurance exercise training increases maximal attainable O2 uptake (VO2max) and stroke volume (SV) in patients with ischaemic heart disease. To determine the mechanisms responsible for enhanced SV after training, 18 patients, 51 +/- 3 years (mean +/- SE) were studied. Patients completed 12 months of endurance exercise with ...
Burlew B S - - 1987
Acute and chronic hemodynamic effects at rest and during exercise of a new dihydropyridine calcium antagonist, nicardipine hydrochloride, were studied in 10 patients with chronic heart failure. Acute intravenous administration of nicardipine resulted in a significant decrease in arterial blood pressure, systemic vascular resistance, and pulmonary capillary wedge pressure. There ...
Driscoll D J - - 1987
To characterize the exercise hemodynamic responses after definitive operation for patients with univentricular atrioventricular connection, we compared the cardiorespiratory response to exercise of 4 patients who had undergone the ventricular septation procedure and 9 patients who had undergone the Fontan operation with that of 38 patients who had univentricular atrioventricular ...
Kelbaek H - - 1987
Left ventricular performance was studied non-invasively in 24 chronic alcoholics without liver disease. Twelve patients who had abstained from drinking for at least one month (group A) and 12 sex and age matched patients who had ceased drinking during the preceding 24 hours (group B) were studied at rest and ...
Ashutosh K - - 1987
Response of mean pulmonary artery pressure (PAP) to breathing oxygen for 24 hours was measured in 43 patients with chronic obstructive pulmonary disease and cor pulmonale (COPD-CP). Considering a greater than or equal to 5 mm Hg fall in PAP after breathing 28 percent oxygen for 24 hours to be ...
Findlay I N - - 1987
The effects of a 30 week exercise programme on serum lipid values, blood pressure, and cardiac function were assessed in a group of sedentary men aged 35-50 training for their first marathon. Mean serum cholesterol concentration (n = 33) fell by 12% from 6.54 (SE 0.18) to 5.76 (0.15) mmol/l ...
Abraham R D - - 1987
The prognostic value of left ventricular (LV) ejection fraction (EF) measured during maximal exercise testing early after acute myocardial infarction (AMI) was assessed in 75 patients, aged 65 years or younger, a mean of 36 days after AMI. At follow-up for a mean 12 months (range 6 to 26), medical ...
Kelbaek H - - 1987
The cardiac function was studied by radionuclide cardiography in eight healthy subjects at rest and during submaximal upright exercise before and after autonomic blockade with metoprolol and atropine. At rest the median stroke volume was reduced by 21% during autonomic blockade (P less than 0.01), but cardiac output was maintained ...
Wieshammer S - - 1987
A series of 13 patients with significant coronary stenoses but without prior myocardial infarction were simultaneously studied by right heart catheterization and radionuclide ventriculography to determine the extent to which abnormal responses in left ventricular ejection fraction and wall motion to maximum exercise are paralleled by abnormal left ventricular filling ...
Suarez J - - 1987
Serial rest and upright cycle exercise 2-dimensional echocardiographic studies were performed in 7 healthy young men during acclimatization to a simulated altitude of 29,000 feet (barometric pressure [PB] 240 torr) in a chamber for 40 days. In all subjects left ventricular (LV) end-diastolic, end-systolic and stroke volumes progressively decreased, with ...
Iida K - - 1987
The purpose of this study was to evaluate the acute effects of sublingual nifedipine (10 mg) on left ventricular systolic function (ejection fraction, peak ejection rate, time to peak ejection rate) and diastolic function (peak filling rate, time to peak filling rate, filling fraction during rapid filling) at rest and ...
Gibbons R J - - 1987
The exercise response of the ratio of systolic blood pressure to end-systolic volume was studied in 243 patients with chest pain and coronary artery disease who underwent supine rest and exercise equilibrium radionuclide angiography. There was a wide variation in both rest and exercise variables in this group. The exercise ...
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