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Results 251 - 286 of 286
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Lichius J J - - 1992
No remarkable differences in the cardenolide pattern of the four varieties of DIGITALIS SUBALPINA could be found. Subalpinoside (Oleandrigenin-glucodigitoxoside) is the main cardiac glycoside in all varieties.
Yost H J - - 1990
The heart of any vertebrate is formed from an apparently symmetric cardiac tube that loops consistently in the same direction along the left-right axis of the embryo. In the amphibian Xenopus laevis, inhibition of proteoglycan synthesis by p-nitrophenyl-beta-D-xylopyranoside during a narrow period of development from late gastrula to early neurula ...
De Riso A - - 1990
Not all surgical patients need the utmost in sophisticated cardiac monitoring. For those who do, however, there is a considerable gain in morbidity and mortality reduction. In this paper, we outline the place of cardiac monitoring in the spectrum of cardiac disease and present cases illustrating its usefulness in both ...
Blakeman B - - 1990
Open cardiac massage yields better hemodynamic results in the laboratory than does closed cardiac massage. However, reported survival rates with the two methods are similar, except in postcardiotomy patients and patients with penetrating injury. Implementation of resuscitation within several minutes of cardiac arrest is far more important than the specific ...
Seibert A F - - 1989
Cardiac asthma has been used as a synonym for episodes of cough, dyspnea, and wheezing caused by left ventricular dysfunction. The similarity of the terms bronchial asthma and cardiac asthma, and the observed symptoms of each disease implies a common pathophysiology. Bronchial asthma is characterized pathologically by airway narrowing, inflammation, ...
Shettar Shashidhar M. - - 1989
The immediate effects of electroconvulsive therapy (ECT) on cardiac conduction, with or without anticholinergic (glycopyrrolate) premedication, were systematically assessed in 19 patients. The resumption of cardiac rhythm after ECT was significantly delayed in treatments without glycopyrrolate. There was no apparent clinical impact of this phenomenon, even though some patients showed ...
Cranefield P F - - 1987
The study of the propagation of the cardiac impulse during the last 35 years is reviewed with special attention to the contributions of Silvio Weidmann and his colleagues. Special emphasis is placed on the need to prove that the cardiac impulse is transmitted electrically, even when it is conducted under ...
Dzimiri N - - 1987
Lipophilicity and inhibitory actions on guinea-pig heart Na+-K+-ATPase of twenty-six digitalis and six strophanthus glycosides comprising the aglycones, mono-, bis-, tris-sugar, alkylated (acylated) tris-sugar, acyl steroid derivatives and three cardanolides were investigated. Their octanol/water partition coefficients (P), reversed phase thin layer (r.t.l.c.) and reversed phase high performance liquid chromatography (r.h.p.l.c.) ...
Smith D C - - 1986
The incidence of cardiac dysrhythmias during inpatient dental anaesthesia under halothane was studied following either hyoscine or droperidol as a supplement to papaveretum for premedication. Forty-three percent of patients given hyoscine exhibited cardiac dysrhythmias compared to 23 percent of the group given droperidol (p = 0.03). The incidence of dysrhythmias ...
Misra M - - 1986
Cardiac glycosides are well known to exert a specific and powerful effect on myocardial tissue, and there is a possibility that this class of compound with a 99mTc radiolabel may behave as a superior myocardial imaging agent in comparison to 201Tl which is at present used clinically. Because of the ...
Rieder C F - - 1985
The present study compares the hemodynamic effectiveness of closed-chest cardiac massage (CCCM) with closed subdiaphragmatic massage (CSDM) and four open transdiaphragmatic cardiac massage techniques during cardiac arrest with an open abdomen. In 10 dogs CCCM resulted in the lowest cardiac index (CI), mean arterial pressure (MBP), and carotid blood flow ...
Berntson G G - - 1984
Cardiac patterns of startle and orienting in response to auditory and vibrotactile stimuli were investigated in the infant chimpanzee and gorilla. Results revealed a notable cardiac acceleration in response to the initial presentations of stimuli of either modality. This acceleratory response appeared to reflect the cardiac correlate of startle and ...
McGoon D C - - 1982
The trends in cardiac surgery during the four decade or so life history of this specialty have been inexorably toward progress--a greater capacity to relieve suffering and to prolong life for patients afflicted with cardiac disease. It has been a team effort, led by a professional coalition of cardiologist, cardiac ...
McComb J M - - 1982
Study of 80 consecutive patients undergoing elective diagnostic cardiac catheterisation showed that after the procedure 25 (31%) developed myoglobinaemia. This was attributed to complications of the catheterisation in two. The remaining 23 had received premedication by intramuscular injection. In patients without intramuscular injections myoglobinaemia did not occur after uncomplicated cardiac ...
Kajiya F - - 1982
The present and future impact of engineering technology on observing and evaluating cardiac function is discussed, with particular reference to the development of cardiac measurements. Several new topics in cardiac imaging, manometers, and blood flow velocity measurements are briefly reviewed. The effectiveness of cardiac models in the evaluation of cardiac ...
Gilinskii M A - - 1981
Regular changes in frequency of cardiac contractions with a period of more than 10 sec were investigated in acute experimentation on immobilized cats. Possible conditions for the origination of decasecond periodicity of cardiac rhythm are examined. Quantitative characteristics are presented. It is shown that spontaneous galvanic skin surges can be ...
Katzeff I E - - 1981
The "imaginary cardiac vector" hypothesis states that the "cardiac vector" is not a "real" vector entity. The hypothesis arises from the fact that voltage is not a vector but a scalar quantity. Nevertheless, in classical electrocardiographic analysis and teaching, the ECG voltage is treated as a vector. These voltages are ...
Steding G - - 1980
The formation of the relief of cardiac septa occurs in connexion with the development of shape of the external cardiac wall. Changes in the form of the external cardiac wall precede changes in the internal cardiac wall. The originally straight tubular heart is angulated at typical sites during cardiac looping. ...
Choay P - - 1978
The electrophysiological, inotropic and chronotropic effects of the two first natural amino-dexoyglyco-cardenolides, mitiphylline and holarosine B, were studied. Mitiphylline has qualitatively the same properties as those of common cardiac glycosides but is more potent; holarosine B has a similar action on cardiac electrophysiological parameters of the guinea pig heart but ...
Alvaran S B - - 1978
The treatment of venous air embolism was compared in adult mongrel dogs utilizing left lateral decubitus position, external cardiac massage, and intracardiac aspiration of air. Following the rapid injection of a lethal dose (15 ml/kg) of air, it was found that the left lateral decubitus position and external cardiac massage ...
Kuhlmann J - - 1977
The combination of cardiac glycosides and canrenoate-potassium (CR-K) produces synergistic effects on hemodynamics. On the other hand, CR-K antagonizes digitalis-induced cardiac arrhythmias. Therefore, it was the purpose of this study to determine interactions between these substances, particularly of their myocardial uptake. The additional administration of CR-K leads to significantly higher ...
Runge T M - - 1977
The principal effects of cardiac glycosides probably can be classified as parasympathomimetic or sympathomimetic. Data from animals and from man suggest that polar cardiac glycosides, such as ouabain and digoxin, possess greater parasympathomimetic (vagal) cardiac effect for a given amount of sympathomimetic (positive inotropic) cardiac effect than do less polar ...
Ray J F - - 1975
Distal propulsion of a 28 mm umbrella filter from vena cava to femoral vein occurred in a 75-year-old woman during external cardiac massage. After cardiac massage, filter position must be checked roentgenographically. Optimal management of distal migration might include placement of a second umbrella to prevent recurrent emboli and proximal ...
Clark D G - - 1973
The cardiac sensitizing potencies of a range of 14 halogenated hydrocarbons were assessed in conscious dogs by comparing the partial pressures (Pcs) needed to sensitize the heart to adrenaline. These were found to be directly related to their saturated vapour pressures (Ps) and the ratio Pcs/Ps was approximately constant although ...
Brower L P - - 1972
A new spectrophotometric assay has been used to determine the gross concentration of cardiac glycoside in individual monarch butterflies. Adults sampled during the fall migration in four areas of eastern North America exhibited a wide variation in cardiac glycoside concentration. The correlation between spectrophotometrically measured concentrations and emetic dose determinations ...
Brod J - - 1972
When the heart ceases to meet the requirements of the body for oxygen, the sympathetic-adrenal system is activated. This occurs in people with a healthy heart when the demands for oxygen are excessive-for example, in heavy muscular work-and in subjects with a failing heart when the demands are normal or ...
Chummun Harry - - 2009
Cardiovascular pathophysiological changes, such as hypertension and enlarged ventricles, reflect the altered functions of the heart and its circulation during ill-health. This article examines the normal and altered anatomy of the cardiac valves, the contractile elements and enzymes of the myocardium, the significance of the different factors associated with cardiac ...
Curtis M - - 1994
There is a growing body of research that connects heart rate and massage. These variously associate massage with reduced cardiac rate, lowered blood pressure, decreased anxiety and increases in relaxation and a sense of well-being. Dunbar and Redick looked specifically at back massage following myocardial infarction and Weiss reports a ...
Shanoff H M - - 1969
New and powerful diuretics have made it possible for the physician to control cardiac edema in most patients. At the same time their potentially dangerous side effects make it mandatory for the physician to be knowledgeable and judicious in their use. The appreciation of a few simplified facts about cardiac ...
Freeman J W - - 1969
Of 80 consecutive admissions to a general hospital for drug overdose, 10 had taken one or other of the tricyclic antidepressants. All 10 had abnormalities of cardiac conduction as shown by prolonged Q-T(e) intervals, and eight had S-T segment and T-wave changes. Five of the 10 patients had arrhythmias and ...
Helin M - - 1968
During a widespread Coxsackie B5 epidemic which occurred in Finland in the autumn of 1965 18 patients with acute myopericarditis were admitted to Kuopio Central Hospital (530 beds, representing a hospital district with 270,000 inhabitants) within a period of three months.The mean age of these patients was 28 years. Twelve ...
Holmes J R - - 1967
The paper describes observations on the distributions of the P, QRS and T cardiac vectors in the horizontal plane in 377 apparently healthy horses. The possible usefulness of vectorcardiography in the clinical evaluation of cardiac function is briefly discussed.
Plonsey R - - 1966
This paper is a critical summary of the implications of potential theory in electrocardiography with particular attention to the "inverse problem." It is emphasized that potential measurements on the human torso serve to determine only the multipole coefficients of the heart sources and that no additional information is available. An ...
FAWAZ G - - 1963
The effects of single doses of reserpine or of guanethidine in increasing the heart rate of the dog heart-lung preparation have been studied. Compared with reserpine, guanethidine increased heart rate more and more rapidly, and the increase lasted longer. When the effects of reserpine had subsided, guanethidine now caused a ...
GRIMLEY P M - - 1960
The fine structure of desmosomes and intercalated discs in the toad heart is discussed. A definite relationship between the dense components of these structures and the dense region of the Z band is demonstrated. The dense region of the Z band characteristically widens at its approach to the plasma membrane, ...
JENSEN D - - 1958
Certain aspects of the acetylcholine hypothesis of cardiac automaticity have been tested in vitro with spontaneously beating cardiac tissue from rabbits, rats, dams, and hagfish. The beat of atria from rabbits and rats may be depressed or excited by acetylcholine, depending upon the state of the tissue. Proguanil and cocaine ...
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