Search Results
Results 701 - 727 of 727
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Kasalický J - - 1977
Eighteen men with myocardial infarction in their history and without signs of heart failure were investigated at rest and during standard supine exercise. In nine patients aneurysma or diskinesis of the left ventricular wall were found. The left ventricular end-diastolic volume was determined from the wash-out of 133Xe injected into ...
Miller A B - - 1977
Postexercise systolic time intervals (STI) were measured in ten patients (PMV group) with auscultatory evidence of the midsystolic click syndrome (i.e. one or more systolic nonejection clicks alone or in association with the late systolic murmur), and compared to eight age-matched volunteers (control group) with no evidence of heart disease. ...
Stephen K W - - 1976
Quantitative uptakes of 99Tcm-pertechnetate by the salivary glands have been measured in 36 subjects and normal values established. While uptake over the parotid gland increased with time, parotid uptakes were higher at all time intervals than uptakes over the submandibular glands. The uptake over the submandibulars also increased with time. ...
Tilkian A G - - 1976
Ninety-one patients with angiographically proved coronary artery disease and stable angina were randomly assigned into surgical and medical therapy. Graded exercise tests were performed on entry into the study and repeated in 1 year. Ventricular arrhythmias during exercise and 8 minutes of recovery were studied. Arrhythmias were graded on a ...
Tilkian A G - - 1976
To assess the effect of long-term lithium therapy on cardiac arrhythmias and cardiovascular performance, extended ambulatory electrocardiographic monitoring was performed in 12 patients, and rest and exercise electrocardiograms in 10 of 12, before and during lithium therapy. Lithium increased the frequency of premature ventricular contractions in three patients, decreased it ...
James F W - - 1976
Heart rate, blood pressure, physical working capacity, and electrocardiographic changes were evaluated during upright bicycle exercise in 43 asymptomatic patients, aged seven to 41 years, one to 14 years after total surgical correction of tetralogy of Fallot (TF). One hundred and nine normal subjects between the ages of five and ...
DeMaria A N - - 1976
Ambulatory monitoring and maximal treadmill exercise were compared in 40 normal subjects and 31 patients with mitral prolapse. A variable arrhythmia spectrum was observed in prolapse during monitoring: premature ventricular contractions in 18 (58%), supraventricular arrhythmias in 11 (35%), and bradyarrhythmias in 9 (29%). Significantly less arrhythmias occurred in normal ...
Atkins J M - - 1976
The incidence of arrhythmias during isometric sustained handgrip exercise and during dynamic graded bicycle exercise was compared in a group of 45 patients with various forms of heart disease on no antiarrhythmic therapy. Atrial arrhythmias were equally common during handgrip and bicycle exercise but ventricular arrhythmias were more frequent during ...
Thompson P L - - 1976
Groups of dogs were exercised immediately before, and immediately after occlusion of the left anterior descending coronary artery. Coronary occlusion by a staged procedure resulted in a low mortality and rare ventricular ectopic beats. The combination of simultaneous exercise with coronary occlusion reproducibly provoked ventricular fibrillation (VF). Exercise before and ...
Miller A B - - 1976
The response to graded submaximal upright bicycle ergometry combined with resting and postexercise systolic time intervals (STIs) was investigated in ten ambulatory subjects (study group) with normal electrocardiograms except for a frontal plane axis of greater than or equal to -30 degrees, or left axis deviation (LAD) mean -40 degrees); ...
Kraus M E - - 1976
The effect of exercise on left ventricular ejection time was determined in 12 subjects with prolapsing mitral valve leaflet syndrome (PML). A single lead ECG (CM5), phonocardiogram and carotid pulse contour were recorded simultaneously with the subjects at supine rest before and immediately after multistage treadmill exercise. Systolic time intervals ...
Kennedy C C - - 1976
Eight men, 45 to 50 years of age, with mild stable angina pectoris, participated in a graduated exercise program. Coronary arteriography, left ventriculography, left ventricular hemodynamics at rest and during supine leg exercise, treadmill testing with electrocardiographic monitoring, and measurement of oxygen uptake were obtained before and 1 year after ...
Henning H - - 1976
The effects of sublingually administered nitroglycerin on segmental left ventricular wall motion determined by videotracking and radiographic left heart size were evaluated at rest and during submaximal hand grip exercise in 10 patients with previous transmural myocardial infarction. After nitroglycerin, diastolic left heart size decreased in the resting state from ...
Faris J V - - 1976
The occurrence of ventricular arrhythmias at rest or during ordinary daily activities has been implicated as a risk factor for future coronary-related events and sudden death. However, the clerical significance of exercise-induced ventricular arrhythmias remains uncertain. To assess the prevalence and reproducibility of such arrhythmias, two serial maximal treadmill exercise ...
Hume L - - 1976
The praecordial accelerocardiogram possesses important practical advantages over more familiar techniques of recording praecordial pulsations. We have compared the amplitude of the P wave of the praecordial accelerocardiogram in 6 normal subjects (group 1) and 21 patients with heart disease (group 2) at rest and after 3 minutes of isometric ...
Caviness V S - - 1976
The classification of the developmental malformations of the posterior fossa associated with hydrocephalus proposed by Chiari is systematic and comprehensive. It is based upon the relative position of cerebellum and brainstem in relation to the foramen magnum and the upper cervical canal. Types I to II are degrees of a ...
Gooch A S - - 1976
To detect transient arrhythmias or conduction disturbances, 200 patients with the symptoms of palpitations, syncope or dizziness, and patients with coronary heart disease, angina pectoris, arrhythmias or conduction disturbances on resting 12-lead electrocardiogram, were studied by submaximal treadmill exercise and portable Holter recording. Thirty-nine patients (19.5%) had arrhythmias on the ...
Blackburn H - - 1976
Current work of the Laboratory of Physiological Hygiene is reviewed on the epidemiology and prevention of ectopic ventricular rhythms (VPB). The evidence suggests that uniform simple VPB at rest, or exercise-induced, are prognostically important only in those having clinically manifest coronary disease. A simple rhythm strip is an effective first ...
Mead W F - - 1976
Two men with coronary heart disease experienced cardiac arrests during a recent exercise rehabilitation session. Fifteen cases of ventricular fibrillation have occurred in this program since 1968, making an average of one per six-thousand man hours of supervised exercise training. All were successfully resuscitated with no sequelae. Analysis of the ...
Horwitz L D - - 1975
Left ventricular dynamics during recovery were measured in dogs, 3 min after brief periods of mild, moderate, and severe treadmill exercise. As compared with resting values, stroke volume was unchanged, and the maximum first derivative of the left ventricular pressure was either unchanged or slightly elevated. Increases in heart rate ...
Amende I - - 1975
The relationship of left ventricular relaxation and compliance to the mechanism of elevation of left ventricular enddiastolic pressure during ischemia was investigated. Isovolumic left ventricular contraction, relaxation, and diastolic pressure-volume relationship were studied in controls and in coronary heart disease patients. Patients were studied at similar heart rates during ergometric ...
Hansen J F - - 1975
The clinical and laboratory findings in 29 patients with idiopathic hypertrophic subaortic stenosis are presented. Dyspnoea during exercise, angina pectoris, syncope combined with left ventricular hyperthrophy on ECG and chest X-ray and a systolic ejection murmur at the apex and the left sternal border are the most important findings. The ...
Ryan M - - 1975
The exposure of ventricular ectopic activity (VEA) by maximal exercise testing and 24-hour ambulatory monitoring was compared in 100 unselected patients with coronary heart disease. The arrhythmia was noted with exercise in 56 patients and with monitoring in 88. Repetitive forms such as couplets and ventricular tachycardia were found to ...
Ball R M - - 1975
Regional myocardial blood flow was measured in nine dogs at rest and during three levels of treadmill exercise by using left atrial injections of 7-10-mum radioactive microspheres. At rest, heart rate was 76 plus or minus 3 beats/min (mean plus or minus SEM), mean left ventricular myocardial flow was 0.94 ...
Ledsome J R - - 1972
1. The diuretic response to left atrial distension was studied during infusion of saline or during infusion of vasopressin at four different dose rates.2. During infusion of saline left atrial distension caused an increase in free water clearance and an increase in osmolal clearance.3. During infusion of vasopressin at a ...
Gibson D G - - 1970
A phonocardiographic method is described for measuring the time taken by the ball of a Starr-Edwards prosthesis to move to the apex of the cage at the onset of left ventricular ejection, and from this its acceleration can be derived. The acceleration is conspicuously increased in post-ectopic beats and in ...
CUMMING G R - - 1963
The electrocardiogram, phonocardiogram and carotid pulse curve were recorded during increasing work loads on an electrically braked bicycle. Heart rate increased linearly with increasing work loads while total systole and tension period decreased. In contrast, during the first periods of light work, systolic ejection time increased. As work load increased, ...
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