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Vanhees L - - 1983
Indices of the first derivative and of the normalized first derivative of the left apexcardiogram were used to evaluate the contractile state of the left ventricle of cyclists in the competitive season compared to their resting season and of cardiac patients before and after a physical training program. In both ...
Møller M - - 1983
The effect of coronary artery bypass surgery (CAB) on ventricular arrhythmias (VA) was studied in a prospective investigation involving 32 patients (mean age 54 years) who underwent CAB because of severe stable angina pectoris. Prior to CAB as well as 12 months later each patient was subjected to the following ...
Zappoli R - - 1983
A right-handed 32-year-old woman had recurrent combined partial temporal and secondary generalized epileptic states almost constantly related to menstruations. During such more or less prolonged episodes sometimes the patient presented right adversive attacks with short postictal dysphasia. The catamenial status epilepticus observed in this cas was manifested in two clear-cut ...
Anversa P - - 1982
Effects on the myocardium, particularly those structural properties of the capillary network relevant to tissue oxygenation, were studied morphometrically in rats subjected to a severe running program. Physical conditioning produced a 31% increase in right ventricular weight and only a 12% increase in the weight of the left ventricle. Quantitative ...
Sugishita Y - - 1982
Nowadays there are various kinds of diagnostic examinations in the field of clinical cardiology. In this field, information concerning structure, dimension (hypertrophy and dilatation) and cardiac function is essentially important. For the diagnosis of valvular and congenital heart diseases and of cardiomyopathy, ultrasonic examinations are more useful; for ischemic heart ...
Andersen K - - 1982
Reproducible left ventricular dimensions were found by M-mode echocardiography in eight healthy men in the semisupine position during two maximal bicycle exercise tests, performed with four hours interval. Left ventricular end-diastolic dimension did not increase during maximal exercise, while fractional shortening increased by a decrease in end-systolic dimension. Twelve men ...
Matsumoto M - - 1982
In order to evaluate left ventricular function during dynamic exercise transoesophageal M-mode recordings of the left ventricle were carried out with a newly developed transducer gastroscope system. Twelve healthy subjects performed a graded supine bicycle exercise test. Stable and good quality images of the left ventricle at rest and during ...
Litchfield R L - - 1982
About one-third of patients who have severe left ventricular dysfunction can achieve normal levels of exercise. To elucidate the mechanisms that permit this to occur, we studied six patients with severe left ventricular dysfunction (average left ventricular ejection fraction 17 +/- 2.5% [mean +/- SEM]) who achieved nearly normal levels ...
Abendschein D R - - 1982
We examined whether submaximal treadmill exercise during acute isovolumic anemia altered the distribution of myocardial blood flow and thus caused subendocardial ischemia in unsedated dogs. Myocardial blood flow (determined by the microsphere method) and left ventricular function (indicated by pressures, volumes, and contractile indices) were measured in five dogs at ...
Engler R - - 1982
The presumption that the results of left ventricular systolic function tests performed at rest are related to the symptoms of chronic congestive heart failure or to exercise capacity is unproved. Thirty-three patients with chronic congestive cardiomyopathy underwent serial exercise tests, determinations of ejection fraction and systolic time intervals, echocardiograms, assessment ...
Powell R R - - 1982
Peripheral Critical Flicker Fusion technology was explored as a basis for inferred differences between right and left cortical hemispheric activity following exercise. 18 subjects underwent three treatments presented in randomized order with 1-wk. intervals in between them. Conditions included a control, 30 min. of steady-state treadmill running, and 20 min. ...
Markiewicz K - - 1982
In two groups of healthy men the dynamics of left-ventricular contraction was studied by Weissler's method based on synchronous recording of ECG, phonocardiogram and carotid sphygmogram. Group I comprised 20 subjects in whom this recording was performed during maximal exercise and 90-minute restitution (1 W/kg/6 min, 2 W/kg/6 min, 3 ...
Davidoff R - - 1982
Same-day exercise electrocardiography and ambulatory electrocardiographic (Holter) monitoring were performed on 167 patients, all of whom had suffered myocardial infarctions over the past 12 years. A significant correlation (P less than 0,0001) was found when comparing exercise testing for ischaemic ST-segment changes and the number of complexity of ventricular arrhythmias ...
Yao L F - - 1982
Desensitization of guinea pig left atria to the inotropic effects of glucagon was produced in vitro by treatment of the atria with 10(-6) M glucagon for 2 or 15 min. Desensitization of the contractile response was associated with a loss of the ability of glucagon to elevate cyclic AMP levels. ...
Sarma R J - - 1982
Forty patients (35 men and five women) who experienced hypotension during maximal symptom-limited exercise test were retested after a 12 +/- 4-month interval. Mean age was 53.5 years. All patients had multiple-vessel disease. Seventeen patients underwent coronary artery bypass surgery because of disabling angina, and 23 patients without disabling angina ...
Sheps D S - - 1982
Systolic time intervals (STI) obtained during exercise are useful as a method of estimating global left ventricular function. The conventional method, however, which requires a carotid pulse tracing as well as a phonocardiogram of high quality, is technically difficult under conditions of exercise. We have validated a new method of ...
Diepstra G - - 1982
Blood flows to major organs were measured in conscious cats to study the changes in the distribution of cardiac output during voluntary static (isometric) exercise. Five animals were operantly conditioned to hold a bar against a fixed resistance for 30 s. Organ flows were measured during rest and exercise by ...
Conn E H - - 1982
The ability of patients with severely impaired left ventricle function to perform short-term exercise and to participate in a cardiac rehabilitation program and attain physical training effects was evaluated. Treadmill exercise tests were performed before and after physical conditioning in 10 patients with a prior myocardial infarction and a left ...
Stroobandt R - - 1982
Repeated maximum exercise testing with an intertest interval of one hour is a valid model for testing drug efficacy and safety on ventricular arrhythmias occurring during exercise. In the two consecutive exercise tests the mean total number of VES was 182 and 184 respectively and the slope of the regression ...
Alpert B S - - 1982
Exercise tests were done on all patients referred to us because of ventricular premature beats. Exercise-associated ventricular tachycardia was seen in three of these patients. Once therapy for the arrhythmia was begun in two patients, we performed serial exercise tests, attempting to provoke the arrhythmia again. In the third patients, ...
Crawford M H - - 1982
We evaluated the effects of isosorbide dinitrate on some of the major determinants of myocardial oxygen demand during upright exercise in ten normal subjects. In addition to heart rate and systolic blood pressure, we assessed left ventricular size and performance by echocardiography. Compared to the control study, heart rate was ...
Viitasalo M T - - 1982
The occurrence of ventricular arrhythmias was studied in 25 healthy young men, with the aid of ambulatory ECG monitoring, during maximal bicycle tests, short term running, exhausting route marches, and during a 16 h period after brief and long term exercise. The bicycle test allowed prediction of 4 out of ...
Markiewicz K - - 1982
The reported investigations were carried out in 50 healthy young men. Twenty of them (group I) performed a three-grade exercise on a Zimmermann cycle ergometer after smoking 4 "Sport" cigarettes, while another 30 subjects served as controls (group II). The exercise was carried out at 60 r.p.m. at a power ...
Wu D - - 1981
Electrophysiologic study, isoproterenol infusion, and serial treadmill exercise tests before and after administration of propranolol, verapamil, lidocaine, and procainamide were done in three patients with exercise-triggered ventricular tachycardia. In all three patients, organic heart diseases were absent. Ventricular tachycardia was reproducibly provoked with exercise and with isoproterenol infusion. Propranolol (tested ...
Hultgren P B - - 1981
Chronic volume overload and subsequent left ventricular hypertrophy (LVH) were produced by a surgical shunt between the left subclavian artery and the left atrial appendage in eight dogs. A sham operation was performed on six control dogs. Analysis of biplane ventriculograms showed no significant differences in ejection fraction, mean wall ...
Wieling W - - 1981
We studied nine freshmen and 14 senior oarsmen undergraduates during seven months of training and compared them with 17 age and sex-matched sedentary control subjects in order to assess the influence of heavy physical exercise on cardiac dimensions and maximal oxygen uptake. Standard M-mode echocardiographic techniques were used. At the ...
Ehsani A A - - 1981
This study was designed to characterize the changes in left ventricular performance induced by graded isometric exercise. Fourteen healthy subjects (12 men and 2 women), aged 19 to 27, performed handgrip isometric exercise at 20, 40, and 60 percent of their maximal voluntary contraction (MVC) with three minutes of rest ...
Kennedy H L - - 1981
Ambulatory electrocardiography and exercise testing are two noninvasive diagnostic procedures widely employed to evaluate patients for cardiac arrhythmias and S-T segment changes. This review addresses the differences and similarities of the two techniques, and examines the relative diagnostic and prognostic merit of the arrhythmia and S-T segment changes detected with ...
Longhurst J C - - 1981
To determine the acute and chronic effects of static and dynamic exercise upon the cardiovascular system, two groups of athletes were studied and compared to untrained control individuals. Thus, 12 long distance runners (LDR) and 17 competitive weight lifters (CWL) were compared to 10 light controls (LC) and 14 heavy ...
Ditchey R V - - 1981
To determine whether exercise training results in increased left ventricular mass in patients with ischemic heart disease, we obtained echocardiograms in 14 coronary patients before and after an average of seven months (range 3 to 14 months) of supervised arm and leg exercise. Each echocardiogram was interpreted jointly by two ...
Löllgen H - - 1981
The effect of Alinidine (ST 567) on hemodynamics at rest and during exercise was studied in subjects with angiographically documented coronary artery disease and left ventricular dysfunction. Exercise tests were performed before and 30 min after intravenous administration of 20 mg of Alinidine. Significant decreases were observed for heart rate ...
Verani M S - - 1981
To determine the effects of exercise training on left ventricular performance and myocardial perfusion in coronary artery disease, rest and exercise radionuclide angiocardiography and thallium-201 scintigraphy were performed before and after 12 weeks of training in 16 coronary patients. After training, 15 of the 16 patients had improved exercise tolerance; ...
Codini M A - - 1981
The effects of coronary bypass grafting on ventricular tachycardia induced by treadmill stress testing (TST) were analyzed in nine patients by repeating the test an average of 5 months after operation. Preoperatively, eight patients experienced pain and all had ischemic ST-segment depression during exercise. Six patients had a single episode ...
Zwehl W - - 1981
A quantitative two dimensional echocardiographic study was conducted in 10 normal subjects performing bicycle exercise in a supine position. Standardized two dimensional echocardiographic short axis and apical views of the left ventricle were analyzed to derive left ventricular sectional areas and length. Over a range of exercise heart rates from ...
Greenspan A M - - 1981
The ventricular effective refractory period is commonly employed as a measurement of ventricular excitability. Because the current strength used to make this determination varies among laboratories, the relation of refractoriness and current was examined over a range of current strengths from 0.1 to 10 mA. Sixty determinations of refractoriness at ...
Bille-Brahe N E - - 1981
In order to estimate the value of haemodynamic parameters in assessing impaired left ventricular function the reproducibility of haemodynamic measurements were investigated at rest and during supine exercise on a bicycle ergometer in fifty-one patients suspected of arteriosclerotic heart disease by means of a Swan-Ganz pulmonary artery thermodilution catheter and ...
Maud P J - - 1981
A 70-year-old South African long-distance runner, holder of his age group's marathon record and former Olympic marathon runner, was studied to determine the effects of 52 years of regular training on functional capacity and health. Maximal treadmill exercise testing revealed no ischaemic ECG abnormalities and an excellent functional capacity (58,6 ...
Carlens P - - 1981
The hemodynamic effects of 0.1 mg/kg verapamil given intravenously to 7 patients with angina pectoris were studied at rest and during exercise in the supine position. Cardiac output was measured with the thermodilution technique, which permitted measurements every 30 sec during exercise. Maximal exercise tolerance increased significantly after verapamil. Verapamil ...
Franciosa J A - - 1981
Symptoms of congestive heart failure occur most commonly during exercise, but cardiac performance is usually quantitated at rest. The relation between exercise capacity and measurements of cardiac performance at rest is little known. Treadmill exercise was performed in 21 patients with heart failure due to cardiomyopathy. Exercise duration averaged 9.1 ...
Rubal B J - - 1981
The cardiac profile of nine AIAW softball champions (SC) was compared with the cardiac profile of 10 sedentary women who were matched according to age and body size (SW). Standard M-mode echocardiography and a maximum graded stress test were performed on each subject. The mean (+/- SE) resting heart rate ...
Meier G D - - 1980
Regional right ventricular (RV) motion was examined in six acutely instrumented dogs by implanting radiopaque markers in three regions of the free wall: the apex, the midventricle, and the outflow tract. These markers were filmed at the paced heart rate of 180 beats/min with a high-speed biplane X-ray system, and ...
Glück E - - 1980
The maximal width of the third ventricle, the maximal distance between the outer tips of the anterior horns, and the number of enlarged cerebral sulci on the two highest CT slices were measured in 68 chronic schizophrenic patients on cranial computed tomograms in order to detect a possible enlargement of ...
Oliveros R A - - 1980
The intraventricular conduction time was measured during rest, exercise, and recovery in five patients who developed acute left anterior hemiblock during exercise-induced myocardial ischemia. The A QRS shifted from 58 +/- 17 degrees at rest to -66 +/- 11 degrees during exercise (p less than 0.001). The intraventricular conduction time ...
Bille-Brahe N E - - 1980
Haemodynamic studies at rest and during exercise before and after digitalization were carried out in 11 patients with vascular disease. Haemodynamic parameters at rest were within normal limits except for one patient, who had a cardiac index (CI) below 2.51/min/m2. During exercise 7 of the patients showed impaired left ventricular ...
Kanakis C - - 1980
Nine healthy male subjects ages 18-27 exercised five days per week. Three days per week they performed five repetitions of squats, leg extensions and leg flexions with maximal resistance for a total of 11 sets. On the other two days each week subjects performed five leg presses and 20 calf ...
Rothfield D - - 1980
Two cases of ventricular fibrillation occurring during a physician-directed exercise program are described. Both were successfully resuscitated. No single clinical parameter can predict which patient is at increased risk for exercise-induced ventricular fibrillation. We conclude that all cardiac patients who wish to exercise should do so only with physician supervision.
Vlaicu R - - 1980
Cardiac arrhythmias, investigated in 1000 persons subjects to a submaximal exercise test, showed an incidence of 6%. The most frequent were the ventricular premature beats, related in more than half of the cases to an organic, probably ischemic, heart disease. Left bundle branch block and ventricular tachycardia were rare and ...
Chmura J - - 1980
The effect of submaximal exercise at steady workload on left-ventricular systolic time intervals (STI) was studied in healthy subjects. In group I (22 subjects) 20% glucose solution was injected intravenously in a dose of 2.5 ml/kg of body weight before the exercise. In group II (20 subjects) the same exercise ...
Ivanova L A - - 1980
Prognostic significance of ambulatory electrocardiographic monitoring and exercise testing was studied in 144 patients with established ischemic heart disease. A follow-up study showed that 10 sudden deaths occurred within 2 years. The univariates most strongly associated with the subsequent occurrence of sudden death included reduced maximal exercise heart rate, exercise-induced ...
Bjurstedt H - - 1980
We studied the respiratory and circulatory effects in six healthy supine volunteers of continuous negative-pressure breathing (CNPB) at -15 and -30 cmH2O at rest and during dynamic leg exercies at 50% of individual working capacity. CNPB had no significant effects on respiratory minute volume, tidal volume, or arterial carbon dioxide ...
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