Browse Items · NEOMED Bibliography Database

The objective of this study was to determine whether myocardial contractility is depressed by intense activation of the sympathetic nervous system. A massive sympathetic discharge was produced by injecting veratrine or sodium citrate into the…

Maximal aerobic power after competitive marathon running.

We evaluated the ability of a group of male runners (n = 4) to do maximal and submaximal exercise before and after they ran a competitive marathon (42.2 km) race. VO2max was determined 3 to 6 times in each runner, on alternate days, 1-4 weeks prior…

Tags: *Physical Exertion, *Running, 1988, Adult, Blood Chemical Analysis, Canadian journal of sport sciences = Journal canadien des sciences du sport, Exercise Test, Hematocrit, Hemoglobins/analysis, Horvath S M, Humans, Male, Maron M B, Oxygen Consumption, Oxygen/*physiology

Adrenal epinephrine increases alveolar liquid clearance in a canine model of neurogenic pulmonary edema.

Case reports of neurogenic pulmonary edema (NPE) often indicate that the edema resolves quickly. Because plasma epinephrine concentration may be elevated in NPE, and epinephrine has been shown to increase the rate of alveolar liquid clearance (ALC),…

Tags: 1998, Adrenal Glands/*metabolism, Adrenalectomy, Adrenergic beta-Agonists/blood/*pharmacology/therapeutic use, Adrenergic beta-Antagonists/therapeutic use, American journal of respiratory and critical care medicine, Amiloride/therapeutic use, Animal, Animals, Awender N E, Blood, Blood Pressure, Brain Diseases/chemically induced/*complications, Central Nervous System Agents/adverse effects, Cisterna Magna, Disease Models, Diuretics/therapeutic use, Dogs, Epinephrine/blood/*physiology/therapeutic use, Extravascular Lung Water/chemistry/*metabolism, Female, Hypertension, Injections, Lane S M, Maender K C, Male, Maron M B, Propanolamines/therapeutic use, Proteins/analysis, Pulmonary Alveoli/*metabolism, Pulmonary Artery, Pulmonary Edema/etiology/*metabolism/prevention & control, Pulmonary/prevention & control, Sodium Channel Blockers, Veratrine/adverse effects

Inactivation of one copy of the mouse neurotrophin-3 gene induces cardiac sympathetic deficits.

Whether two copies of the neurotrophin-3 (NT3) gene are necessary for proper development of cardiac sympathetic innervation was investigated in mice carrying a targeted inactivation of the NT3 gene. Heterozygous (+/-) and null (-/-) mutant mice had…

Effect of high transcapillary pressures on capillary ultrastructure and permeability coefficients in dog lung.

To determine the correlation between ultrastructural and physiological changes in blood-gas barrier function in lungs transiently exposed to very high vascular pressures, we increased capillary transmural pressure (Ptm) of 6 canine isolated perfused…

Effect of epinephrine on alveolar liquid clearance in the rat.

Endogenous epinephrine has been found to increase alveolar liquid clearance (ALC) in several pulmonary edema models. In this study, we infused epinephrine intravenously for 1 h in anesthetized rats to produce plasma epinephrine concentrations…

Dose-response relationship between plasma epinephrine concentration and alveolar liquid clearance in dogs.

Previously, alveolar liquid clearance (ALC) was observed to increase in a canine model of neurogenic pulmonary edema (NPE) by adrenal epinephrine (S. M. Lane, K. C. Maender, N. E. Awender, and M. B. Maron. Am. J. Respir. Crit. Care Med. 158:

Tags: 1998, Algorithms, Animals, Blood Pressure/drug effects/physiology, Cardiac Output/drug effects/physiology, Catecholamines/blood, Dogs, Dose-Response Relationship, Drug, Epinephrine/*blood, Female, Hematocrit, Journal of applied physiology (Bethesda, Md. : 1985), Male, Maron M B, Pulmonary Alveoli/*physiopathology, Pulmonary Circulation/drug effects/physiology, Pulmonary Edema/*blood/*physiopathology, Pulmonary Wedge Pressure/drug effects/physiology

Effect of neuropeptide Y on hemodynamics of the rabbit lung.

We evaluated the effect of neuropeptide Y (NPY) on the hemodynamics of the isolated rabbit lung perfused at constant flow and outflow pressure. Doses of 10(-8) and 10(-7) M NPY increased pulmonary arterial pressure (Ppa) from 11.5 +/- 1.0 (SE) mmHg…

Tags: 1998, Animals, Cisterna Magna, Hemodynamics/*physiology, In Vitro Techniques, Injections, Journal of applied physiology (Bethesda, Md. : 1985), Lang S A, Maron M B, Neuropeptide Y/blood/pharmacology/*physiology, Norepinephrine/pharmacology, Perfusion, Pulmonary Circulation/drug effects/*physiology, Rabbits, Sympathetic Nervous System/drug effects/physiology, Vascular Resistance/drug effects/physiology, Vasoconstriction/drug effects/physiology, Vasoconstrictor Agents/pharmacology, Veratrine/administration & dosage/pharmacology

Alveolar liquid clearance in multiple nonperfused canine lung lobes.

We evaluated the ability of canine isolated nonperfused lung lobes to absorb fluid from their air spaces by simultaneously measuring alveolar liquid clearance (ALC) in three lobes removed from the same dog. Autologous plasma was instilled in the air…

Tags: 1997, Animals, Dogs, Female, Grimme J D, Journal of applied physiology (Bethesda, Md. : 1985), Lane S M, Lung/drug effects/*metabolism, Male, Maron M B, Pulmonary Alveoli/drug effects/*metabolism, Pulmonary Edema/metabolism, Terbutaline/pharmacology

Role of EDRF in the cardiopulmonary dysfunction produced by massive sympathetic activation.

This study was undertaken to determine whether endothelium-derived relaxing factor (EDRF) modulates the pulmonary and systemic hemodynamic responses to massive sympathetic nervous system (SNS) activation and, in so doing, also modulates the degree of…

Time course of blood volume changes in an isolated lung lobe after venous pressure elevation.

The elevation of venous pressure (Pv) in isolated perfused organs causes organ weight to increase in a biphasic manner. The initial rapid phase results primarily from an increase in blood volume (BV), whereas the second slower phase is generally…

Tags: *Blood Volume/drug effects, *Pulmonary Circulation, *Venous Pressure, 1994, Animals, Dogs, Extravascular Lung Water/metabolism, Female, In Vitro Techniques, Indicator Dilution Techniques, Indocyanine Green, Journal of applied physiology (Bethesda, Md. : 1985), Lane S M, Lung/*physiology, Male, Maron M B, Papaverine/pharmacology, Perfusion, Time Factors

Edema development and recovery in neurogenic pulmonary edema.

We determined the time course of changes in extravascular lung water (EVLW) that occur after massive sympathetic activation produced by intracisternal veratrine administration in chloralose-anesthetized dogs. Three groups of dogs were studied. In the…

Effect of peak inspiratory pressure on the filtration coefficient in the isolated perfused rat lung.

Positive inspiratory pressure- (PIP) ventilated, isolated rat lungs become edematous when perfused at rates approximately the normal cardiac output. The study was conducted to test the hypothesis that high peak inspiratory pressures contribute to the…

Pulmonary vascular protein sieving capability after exposure to high vascular pressures.

We evaluated the ability of the canine in situ left lower lobe (LLL) vasculature to sieve endogenous plasma proteins of various molecular radii (34-124 A) after LLL arterial pressure had been transiently elevated to 23.8 +/- 0.9 (control group, n =…

Circulating neuropeptide Y does not produce pulmonary hypertension during massive sympathetic activation.

We tested the possibility that neuropeptide Y (NPY) may contribute to the pulmonary hypertension that occurs after massive sympathetic activation produced by intracisternal veratrine administration in the chloralose-anesthetized dog. In six dogs,…

Tags: 1992, Adrenal Glands/drug effects/physiology, Adrenalectomy, Animals, Dogs, Hypertension, In Vitro Techniques, Journal of applied physiology (Bethesda, Md. : 1985), Lang S A, Maender K C, Maron M B, Neuropeptide Y/*physiology, Norepinephrine/pharmacology, Pilati C F, Pulmonary Circulation/drug effects, Pulmonary/chemically induced/*physiopathology, Sympathetic Nervous System/*physiology, Veratrine/pharmacology

Hemodynamic basis for cocaine-induced pulmonary edema in dogs.

We tested the hypothesis that cocaine-induced impairment of left ventricular function results in cardiogenic pulmonary edema. Mongrel dogs, anesthetized with alpha-chloralose, were injected with two doses of cocaine (5 mg/kg iv) 27 min apart. Cocaine…

Tags: 1991, Animals, Blood Pressure/drug effects, Cardiac Output/drug effects, Cocaine/*toxicity, Coronary Circulation/drug effects, Dogs, Female, Heart Rate/drug effects, Hemodynamics/*drug effects, Journal of applied physiology (Bethesda, Md. : 1985), Lang S A, Male, Maron M B, Pulmonary Circulation/drug effects, Pulmonary Edema/chemically induced/*physiopathology, Stroke Volume/drug effects, Vascular Resistance/drug effects

Role of hemodynamics and vagus nerves in development of fibrin-induced pulmonary edema.

The rapid development of pulmonary edema that may occur in the rabbit after the intracisternal injection of a mixture of fibrinogen and thrombin has classically been considered to result from a vagally mediated increase in vascular permeability (G.…

Pulmonary vasoconstriction in a canine model of neurogenic pulmonary edema.

The intracisternal administration of veratrine to the chloralose-anesthetized dog produces pulmonary hypertension (PH) and neurogenic pulmonary edema (NPE). To determine whether pulmonary vasoconstriction, mediated by a circulating agent, contributes…

Effect of elevated vascular pressure transients on protein permeability in the lung.

Neurogenic pulmonary edema (NPE) may develop in individuals with head trauma or seizures and is generally thought to have a hydrostatic basis in the severe degree of pulmonary hypertension that occurs. Recently, it has been suggested that vascular…

Tags: *Blood Pressure, 1989, Animals, Blood Proteins/*metabolism, Dogs, Female, Hypertension/physiopathology, In Vitro Techniques, Journal of applied physiology (Bethesda, Md. : 1985), Lung/metabolism/*physiopathology, Male, Maron M B, Pulmonary Edema/*etiology/metabolism/physiopathology

Effect of papaverine on pulmonary vascular permeability to proteins.

Previous studies have suggested that papaverine, a drug commonly used in studies of transvascular fluid and solute exchange to eliminate confounding effects of changes in vascular tone, may itself increase vascular permeability. In this study, we…

Tags: 1988, Animals, Blood Proteins/*metabolism, Capillary Permeability/*drug effects, Dogs, Female, In Vitro Techniques, Journal of applied physiology (Bethesda, Md. : 1985), Male, Maron M B, Osmosis, Papaverine/blood/*pharmacology, Pilati C F, Pulmonary Circulation/*drug effects, Serotonin/pharmacology, Vasodilation/drug effects, Water-Electrolyte Balance/drug effects

Calculation of the reflection coefficient from measurements of endogenous vascular indicators.

The solvent drag reflection coefficient (sigma) for total proteins can be estimated by comparing the relative degrees of concentration of erythrocytes and plasma proteins that occur during fluid filtration in an isolated perfused organ. In this…

Tags: 1988, Animals, Blood Proteins/*analysis, Blood Volume, Capillary Permeability, Filtration, Humans, Journal of applied physiology (Bethesda, Md. : 1985), Maron M B, Mathematics, Methods, Models, Pilati C F, Theoretical

Factors involved in left ventricular dysfunction after massive sympathetic activation.

We sought to determine whether catecholamines are responsible for the depressed left ventricular (LV) function that follows massive sympathetic nervous system (SNS) activation and whether the additional myocardial energy demands of

Tags: *Ventricular Function, 1992, Animals, Blood Pressure/drug effects/physiology, Bosso F J, Catecholamines/physiology, Female, Heart Conduction System/*physiology, Heart Diseases/*physiopathology, Heart Rate/drug effects, In Vitro Techniques, Left, Male, Maron M B, Pilati C F, Rabbits, Sympathetic Nervous System/drug effects/*physiology, The American journal of physiology, Veratrine/pharmacology

Effect of pathological blood histamine levels on canine coronary vascular permeability.

We evaluated the effect of systemically administered histamine on coronary vascular permeability (CVP) of pentobarbital-anesthetized, open-chest dogs with and without beta-receptor blockade. We determined changes in CVP by comparing prenodal cardiac…

Tags: *Capillary Permeability, *Coronary Circulation, 1988, Animals, Blood Proteins/analysis, Dogs, Female, Hemodynamics, Histamine/*blood, Lymph/analysis, Male, Maron M B, Microcirculation, Pilati C F, The American journal of physiology

Oxygen consumption after massive sympathetic nervous system discharge.

We evaluated the possibility that massive, sympathetic nervous system (SNS) activation [as may precede the development of neurogenic pulmonary edema (NPE)] increases O2 demand. O2 consumption (VO2) and plasma concentrations of the calorigenic agents,…

Relating basic concepts of pulmonary mechanics to clinical situations.

Tags: *Education, 1997, Biomechanical Phenomena, Curriculum, Graduate, Humans, Lung Compliance/physiology, Lung Diseases/physiopathology, Maron M B, Medical, Physiology/*education, Pneumothorax/physiopathology, Respiratory Mechanics/*physiology, The American journal of physiology, Thorax/physiology, Vital Capacity

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