abstract：:We have used a miniature cadmium telluride detector in the assessment of muscle blood flow during dynamic exercise in man following local injection of 133Xenon. The results obtained were compared with those using a conventional sodium iodide detector. There was no significant difference between the results obtained wi...

journal_title：Cardiovascular research

authors： Smith RS,Bojsen J,Warren DJ

更新日期：1981-12-01 00:00:00

abstract：:An in situ preparation of the rabbit thoracic aorta has been used to study the transport of short-lived radioactive isotopes of oxygen (15O16O), nitrogen (13N14N) and an isotope of xenon (133Xe) from 0.9% NaCl into the artery wall. At a luminal hydrostatic pressure of 2 kPa the uptake of all three isotopes by the inti...

journal_title：Cardiovascular research

authors： Davis J,Klinowski J,Winlove CP

更新日期：1981-08-01 00:00:00

abstract：:The static elastic properties of the aorta ad systolic blood pressure in the caudal artery have been measured in 55 spontaneously hypertensive rats of the AS strain. Animals were divided into five groups and treated from the age of 4 to 12 weeks as follows: (1) 0.25 mm silver clip positioned around the right renal art...

journal_title：Cardiovascular research

authors： Berry CL,Greenwald SE,Menahem N

更新日期：1981-07-01 00:00:00

abstract：:To improve assessment of ventricular function during cardiac catheterisation there should be available a continuous registration of stroke volume and cardiac output in addition to ventricular pressure. To obtain the desired volumetric quantities a catheter has been developed which measures changes in intraventricular ...

journal_title：Cardiovascular research

authors： Baan J,Jong TT,Kerkhof PL,Moene RJ,van Dijk AD,van der Velde ET,Koops J

更新日期：1981-06-01 00:00:00

abstract：:Little information exists regarding the effects of coronary artery occlusion on the distribution and actions of antiarrhythmic agents. We administered aprindine to dogs before, 5 min after, and 24 h after one-stage left anterior descending coronary artery (LAD) occlusion. Coronary artery occlusion performed after apri...

journal_title：Cardiovascular research

authors： Nattel S,Pedersen DH,Zipes DP

更新日期：1981-02-01 00:00:00

abstract：:The effect of adding fibrinolytic to penicillin therapy in experimentally induced streptococcal bacterial endocarditis has been studied in the rabbit. In 9 day old infected lesions, the vegetations could be substantially reduced in size after a 3 day course of intravenous streptokinase. Quantitative microbiological te...

journal_title：Cardiovascular research

authors： Johnson CE,Dewar HA,Aherne WA

更新日期：1980-08-01 00:00:00

abstract：:Cardiac accumulation patterns of pyrophosphate labelled with techetium-99m (TcPyP) in rats one hour to 7 days after coronary artery ligation were studied by light microscopy, myocardial scintigraphy, imaging the isolated heart and by direct measurement of tissue activity. Results suggest that myocardial cells taking u...

journal_title：Cardiovascular research

authors： Lessem J,Polimeni PI,Page E,Resnekov L,Harper PV,Stark V

更新日期：1980-06-01 00:00:00

abstract：:The significance of pre-existing coronary collaterals for preservation of the myocardium during coronary occlusion and reperfusion was studied in anaesthetised open-chest dogs. The extent of myocardial ischaemic damage was assessed by the accumulation of calcium in the central zone of the ischaemic area and the size o...

journal_title：Cardiovascular research

authors： Tanabe M,Fujiwara S,Ohta N,Shimamoto N,Hirata M

更新日期：1980-05-01 00:00:00

abstract：:An analytical formulation has been developed which allows the computation of mitral valve area (A) from the potentially noninvasive paramaeters of hear rate (R), cardiac output (CO) and diastolic filling period (DFP) by the equation A = 21 CO/R x DFP2. The computed areas correlate with autopsy and open heart measureme...

journal_title：Cardiovascular research

authors： Seitz WS,Operschall EJ

更新日期：1980-04-01 00:00:00

abstract：:To test hypothesis that adrenergic neurotransmission is impaired in acute myocardial ischaemia, we studied contractile function of normal and ischaemic myocardium after coronary artery occlusion. For each area we compared the contractile response to left sympathetic nerve stimulation (LSS) with the response to exogeno...

journal_title：Cardiovascular research

authors： Martins JB,Kerber RE,Marcus ML,Laughlin DL,Levy DM

更新日期：1980-02-01 00:00:00

abstract：:The mechanisms whereby glucose reduces fatty acid-induced release of enzyme from the coronary-ligated isolated perfused working rat heart are investigated. Alterations in the tissue contents of ATP, phosphocreatine, or glycogen could be excluded as possible mechanisms for the beneficial effect of glucose in this syst...

journal_title：Cardiovascular research

authors： Opie LH,Bricknell OL

更新日期：1979-12-01 00:00:00

abstract：:Estimation of infarct size from enzyme activities in plasma or serum presupposes known values of circulatory parameters such as the extravascular distribution volume Ve and the permeability constant P for the transport of enzyme between intravascular volume Vi and Ve. In man, parameter values are used that are extrapo...

journal_title：Cardiovascular research

authors： Willems GM,Muijtjens AM,Lambi FH,Hermens WT

更新日期：1979-10-01 00:00:00

abstract：:The effect of catheterisation on the rabbit aortic wall is investigated employing a technique identical to that used for continuous monitoring of blood pressure in humans. The catheters were introduced into the aorta through the right femoral artery of the rabbit using the Seldinger technique, except that the catheter...

journal_title：Cardiovascular research

authors： Madsen JK,Garbarsch C,Nielsen PE

更新日期：1979-09-01 00:00:00

abstract：:Ventricular function curves relating stroke work and left ventricular end-diastolic pressure were generated in awake dogs during increases in preload produced by infusion of fluid and during increases in afterload produced by administration of phenylephrine. The ventricular function curves produced by preloading were ...

journal_title：Cardiovascular research

authors： Rosenfeldt FL,Cobb FR,Bache RJ,Sabiston DC Jr

更新日期：1979-07-01 00:00:00

abstract：:Injudicious selection of a saphenous vein graft can adversely affect the the late postoperative patency of the proximal coronary artery which it bypasses. The purpose of this investigation was to deduce an upper bound for graft diameter, at small angle of distal anastomosis, below which the stenosed artery will remain...

journal_title：Cardiovascular research

authors： Moskowitz SE,Lewis BS,Milo S,Amar R

更新日期：1979-07-01 00:00:00

abstract：:18 patients without valvular pathology, coronary artery disease, or idiopathic hypertrophic subaortic stenosis were haemodynamically and angiographically investigated in order to analyse the effects of a ventricular extrasystolic beat upon the post-extrasystolic left ventricular peak pressure. In eight normal patients...

journal_title：Cardiovascular research

authors： Merillon JP,Motte G,Aumont MC,Masquet C,Lecarpentier Y,Gourgon R

更新日期：1979-06-01 00:00:00

abstract：:Extracellular potassium activity before and after coronary occlusion was measured in the canine heart by means of potassium-selective surface electrodes. In the ischaemic myocardium potassium activity rapidly increased from a preocclusion value of 3.2 +/- 0.3 mmol.litre-1 to 10 +/- 0.6 mmol.litre-1 within the first 5 ...

journal_title：Cardiovascular research

authors： Wiegand V,Güggi M,Meesmann W,Kessler M,Greitschus F

更新日期：1979-05-01 00:00:00

abstract：:The effects on an acute myocardial infarction of equipotent hypotensive doses of nitroglycerin and dipyridamole were studied using the thermographic technique in open-chest dogs. Nitroglycerin did not reduce the cool ischaemic area in any of the nine dogs studied. In six of the dogs, in which the ischaemic region coul...

journal_title：Cardiovascular research

authors： Malm A,Arborelius M Jr,Lilja B,Gil RL,Bornmyr S

更新日期：1979-05-01 00:00:00

abstract：:The mechanical, haemodynamic, and energetic functions of isolated perfused working hearts from chronic alcoholic and control rats were studied. Male Long-Evans rats were fed a nutritionally-complete liquid diet containing 38% of daily calories as ethanol (isocaloric replacement with dextrin-maltose for controls) for 3...

journal_title：Cardiovascular research

authors： Segel LD,Rendig SV,Mason DT

更新日期：1979-03-01 00:00:00

abstract：:An investigation of changes in the Mg2+ -dependent, Na+ -K+ -stimulated sarcolemmal ATPase and of intracellular electrolytes in the left failing heart due to pressure overload (aortic banding) was carried out in dogs. There was no change in the sarcolemmal Mg2+ -ATPase of the left or right ventricle for the whole dura...

journal_title：Cardiovascular research

authors： Prasad K,Khatter JC,Bharadwaj B

更新日期：1979-02-01 00:00:00

abstract：:Pulsatile haemodynamics associated with graded degrees of experimentally produced stenosis were studied in the canine femoral artery. Invasively determined pulsatile blood flow and noninvasively determined blood velocity with Doppler ultrasound were measured an average of 1.3 and 2.3 cm proximal to the stenosis, respe...

journal_title：Cardiovascular research

authors： Farrar DJ,Green HD,Peterson DW

更新日期：1979-01-01 00:00:00

abstract：:Muscle tissue in atrioventricular (A-V) cardiac valve leaflets was studied in 35 human hearts and was found to be more prominent in the anterior leaflet of the mitral (MAL) than in the other valve leaflets. From serial sectioning and wax model reconstruction, the anatomic arrangement of the muscle in the MAL indicates...

journal_title：Cardiovascular research

authors： Boucek RJ,Boucková B,Levy S

更新日期：1978-11-01 00:00:00

abstract：:End-diastolic current thresholds have been measured in 12 open-chested dogs with epicardial disc electrodes ranging in radius from 0.01 to 9.0 mm. The current threshold for cathodal 1 ms impulses proved to be independent of electrode size for radii smaller than 0.2 mm and proportional to the radius to the power 1.5 fo...

journal_title：Cardiovascular research

authors： Lindemans FW,Denier Van der Gon JJ

更新日期：1978-08-01 00:00:00

abstract：:Methodology has been developed for utilising ultrasonic crystals in closed chest cats to measure alterations in regional left ventricular function. The technique is a modification of one previously utilised to monitor regional left ventricular length and thickness changes in closed chest dogs. The ultrasonic crystals ...

journal_title：Cardiovascular research

authors： Hurlbut TA,Scales F,Buja LM,Willerson JT

更新日期：1978-06-01 00:00:00

abstract：:Studies were carried out in four different canine preparations to determine the effect of collateral flow on early changes induced by acute segmental ischaemia. The results of these experiments indicated that collateral flow provided a limited and variable amount of protection. When collateral flow was eliminated, myo...

journal_title：Cardiovascular research

authors： Koke JR,Bittar N

更新日期：1978-05-01 00:00:00

abstract：:Twenty patients who had suffered myocardial infarction within the previous 3 to 13 days performed face immersion with breath-holding. The maximum reduction in heart rate was 17 +/- 9 beats-min--1 (mean +/- SD). When compared with 24 patients without evidence ischaemic heart disease, they behaved more like younger pati...

journal_title：Cardiovascular research

authors： Gooden BA,Holdstock G,Hampton JR

更新日期：1978-04-01 00:00:00

abstract：:Sudden hypothermia utilising liquid nitrogen has been used for immediate inhibition of metabolic reactions and preservation of labile compounds in heart muscle. It has been suggested that this rapid transfer of tissue into liquid nitrogen, within 1 to 2 s, is essential for accurate assessment of internal milieu condit...

journal_title：Cardiovascular research

authors： Allison TB,Ramey CA,Holsinger JW Jr

更新日期：1978-03-01 00:00:00

abstract：:Regional myocardial anoxia was produced in dogs by perfusion of the left circumflex artery (LCA) with deoxygenated blood. Isolated sarcoplasmic reticulum fragments (cardiac relaxing system) showed decreased Ca2+ binding and uptake. The ability of isolated mitochondria to utilise long-chain fatty acids was markedly red...

journal_title：Cardiovascular research

authors： Bornet EP,Wood JM,Goldstein MA,Entman ML,Lewis RM,Dunn FA,Schwartz A

更新日期：1977-11-01 00:00:00

abstract：:The theoretical possibilities and the practical limitations of the Xenon-133 (133Xe) method for the study of regional myocardial perfusion in man are discussed. The techniques for data acqusition and processing developed over the past 5 years are described in detail. Illustrative examples of experimental findings are ...

journal_title：Cardiovascular research

authors： Maseri A,L'abbate A,Michelassi C,Pesola A,Pisani P,Marzilli M,De Nes M,Mancini P

更新日期：1977-07-01 00:00:00

abstract：:Myocardial function, flow and O2 consumption were compared in cardiac hypertrophy induced by pressure-loading (P) and by volume overloading (V). Increases in LV-to-body weight ratios in P and V hypertrophied hearts were comparable. Indices of LV function such as cardiac output, stroke volume, stroke work, minute work,...

journal_title：Cardiovascular research

authors： Malik AB,Geha AS

更新日期：1977-07-01 00:00:00

abstract：:Tension and action potentials have been measured simultaneously from isolated cat papillary muscles. Two groups of experiments are described. In the first group, the external conditions under which the muscle contracted were changed. Specifically, stimulation rate, extra-cellular [Ca++], extracellular [Na++] were alte...

journal_title：Cardiovascular research

authors： Allen DG

更新日期：1977-05-01 00:00:00

abstract：:The theory related to the loss of R waves and appearance of Q waves in acute myocardial infarction is discussed. A method of praecordial mapping of RS ratio changes and the appearance of Q waves that occur in acute myocardial infarction is described. The serial changes in these electrocardiographic signs in 17 patient...

journal_title：Cardiovascular research

authors： Selwyn AP,Shillingford JP

更新日期：1977-03-01 00:00:00

abstract：:The cardiospecificity of the MB isoenzyme of creatine kinase, EC 2.7.3.2, (CK) with its associated diagnostic and research value has resulted in the development of a number of procedures for the separation and quantitation of the three isoenzymes of CK. In our experience methods involving cellulose acetate electrophor...

journal_title：Cardiovascular research

authors： Ogunro EA,Hearse DJ,Shillingford JP

更新日期：1977-03-01 00:00:00

abstract：:Known viable allograft canine pulmonary valves were inserted in an isotopic position ensuring normal physiological function and simulating the clinical situation. Valves removed at periods up to eight weeks were assessed for viability using previously established criteria of tissue culture and protein and collagen syn...

journal_title：Cardiovascular research

authors： Wheatley DJ,McGregor CG

更新日期：1977-01-01 00:00:00

abstract：:If the posterior hypothalamus contributes to elevate blood pressure in hypertension by increasing sympathetic vasomotor activity, then lesions of the posterior hypothalamus should lower blood pressure more in hypertensive than in normotensive rats. To test this hypothesis without complications caused by anaesthesia, a...

journal_title：Cardiovascular research

authors： Buñag R,Eferakeya A

更新日期：1976-11-01 00:00:00

abstract：:The left ansa subclavia was stimulated at supramaximal intensity at a frequency of Hz in open-chest, anaesthetized dogs for periods of about 10 min. Arterial blood pressure, myocardial contractile force, and coronary sinus blood flow reached peak values after 1 or 2 min of stimulation, and then declined gradually thro...

journal_title：Cardiovascular research

authors： Levy MN,Blattberg B

更新日期：1976-09-01 00:00:00

abstract：:Physical training has been advocated to minimize the problems associated with coronary heart disease; however, the responsible mechanisms are obscure. Rats trained to run on a treadmill were subjected to acute conditions of hypoxia and myocardial ischaemia. Trained rats were better able to maintain a higher level of c...

journal_title：Cardiovascular research

authors： Carey RA,Tipton CM,Lund DR

更新日期：1976-05-01 00:00:00

abstract：:Exogenous angiotensin II causes noradrenaline supersensitivity in rat mesenteric vasculature preparations. The noradrenaline supersensitivity of tissues from renal/salt hypertensive rats, with low plasma renin activity, is not caused by endogenous angiotensin II since it was unaffected by Sar1 Ileu8 angiotensin II. Di...

journal_title：Cardiovascular research

authors： Collis MG,Alps BJ

更新日期：1976-03-01 00:00:00

abstract：:This study is the first report describing the sequence of biochemical alterations of myocardium during the progression of naturally occurring hypertrophy in spontaneously hypertensive rats (SHRs) and then with its reversal by alpha-methyldopa therapy. Changes in DNA, RNA, hydroxyproline, as well as incorporation of 14...

journal_title：Cardiovascular research

authors： Sen S,Tarazi RC,Bumpus FM

更新日期：1976-03-01 00:00:00

abstract：:A mathematical formulation of the blood flow behaviour through a capillaron model is described. The formulation is applied to the analysis of post-occlusion (reactive) hyperaemia and autoregulation. ...

journal_title：Cardiovascular research

authors： Murao H,Rodbard S

更新日期：1976-01-01 00:00:00