quinidine/hypoxia

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Influence of hypoxia on the myocardial uptake and pharmacodynamics of quinidine in isolated perfused rabbit hearts.

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

The effects of hypoxia on the myocardial uptake and pharmacodynamics of quinidine were studied in isolated perfused rabbit hearts. Hearts were perfused with a modified Krebs-Henseleit buffer that was equilibrated with either 95% O2-5% CO2 (normoxia) or 95% N2-5% CO2 (hypoxia). The myocardial

The effects of lidocaine and quinidine on impulse propagation across the canine Purkinje-muscle junction during combined hyperkalemia, hypoxia, and acidosis.

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

During ischemia, lidocaine or quinidine may prevent arrhythmias by blocking conduction without suppressing abnormal automaticity. The purpose of this study was to determine whether lidocaine or quinidine (5 micrograms/ml) produced Purkinje fiber-papillary muscle block during superfusion in vitro

The anti-necrosis role of hypoxic preconditioning after acute anoxia is mediated by aldose reductase and sorbitol pathway in PC12 cells.

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

It has been demonstrated that hypoxic preconditioning (HP) enhances the survival ability of the organism against the subsequent acute anoxia (AA). However, it is not yet clear whether necrosis induced by AA can be prevented by HP, and what are the underlying mechanisms. In this study, we examined

Protein binding of salicylate and quinidine in plasma from patients with renal failure, chronic liver disease and chronic respiratory insufficiency.

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

The plasma protein binding of a representative acidic drug, salicylate, and a representative basic drug, quinidine, has been studied in patients with several diseases that are sometimes associated with uraemia or a change in serum albumin level. Decreased plasma protein binding of salicylate was

Steady-state serum levels of quinidine and active metabolites in cardiac patients with varying degrees of renal function.

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

The concentrations of quinidine, (3S)-3-hydroxyquinidine (3-OH), and 2'-oxoquinidinone (2'-OXO) in serum samples from 25 patients on long-term quinidine therapy were determined by a high-pressure liquid chromatography assay. Large individual variation in the levels of each of the compounds measured

Pharmacokinetics in patients with cardiac failure.

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

Cardiac failure is often associated with disturbances in cardiac output, autonomic nervous system activity, central and systemic venous pressures, and sodium and water metabolism. These disturbances influence the extent and pattern of tissue perfusion, may lead to tissue hypoxia and visceral

Early afterdepolarizations and triggered activity in rabbit cardiac Purkinje fibers recovering from ischemic-like conditions. Role of acidosis.

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

BACKGROUND The mechanisms underlying repetitive activity during reperfusion of ischemic myocardium are thought to include triggered responses elicited at short pacing cycle lengths. The potential to generate repetitive responses at longer pacing cycle lengths under similar conditions, however, has

Development of oxygen sensing in the gills of zebrafish.

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

Previous studies have described the morphology, innervation and O(2)-chemoreceptive properties of neuroepithelial cells (NECs) of the zebrafish gill filaments. The present work describes the ontogenesis of these cells, and the formation of functional O(2)-sensing pathways in developing zebrafish.

Potential identification of the O2-sensitive K+ current in a human neuroepithelial body-derived cell line.

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

Whole cell recording of H-146 cells revealed that the outward K+ current was completely inhibited by quinidine (IC50 approximately 17 microM). In contrast, maximal concentrations of 4-aminopyridine (4-AP; >/=10 mM) reversibly blocked only approximately 60% (IC50 approximately 1.52 mM). Ten

[Supraventricular paroxysmal tachycardia without congenital heart disease: clinical, therapeutic aspects and course in 65 children].

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

We have reviewed the records of 65 children with paroxysmal supraventricular tachycardia (PST) without congenital heart disease followed a mean of 4 years, with a total of 121 episodes. PST appeared before 6 months of age in 42 (64.6%) children. Thirteen patients (20%) had a present factor which

Myocardial cell membrane stabilization and antiarrhythmic action.

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

Shifts in the normal balance of neurovegetative and hormonal regulations, modifications in the ionic composition of the plasma and pathological changes such as ischaemia, hypoxia and hypercapnia may lead to changes in permeability of the cardiac cell membranes to different ions, resulting in

Antifibrillatory and profibrillatory actions of selected class I antiarrhythmic agents.

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

We wished to examine selected class I antiarrhythmic agents for their potential to exhibit proarrhythmic or antifibrillatory actions. Quinidine, lidocaine, aprindine, and flecainide were evaluated in an experimental model that made use of rabbit isolated perfused heart. Hearts were stabilized with

A report of cerebral malaria treated with automated red blood cell exchange.

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

Adjunctive automated whole blood or red blood cell exchange (RBCEx) can rapidly decrease malarial hyperparasitemia. Several case reports and series suggest improvement in clinical symptomatology; however, recent Centers of Disease Control and Prevention (CDC) recommendations concluded that RBCEx has

Cardiovascular and respiratory agents during pregnancy: implications for fetal development.

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

The management of common medical problems in pregnancy often requires adjustments in drug therapy to assure a healthy fetus. The management of steroid-dependent bronchial asthma in pregnancy requires oxygen supplementation as well as vigorous treatment of airway obstruction to protect the fetus from

[Energy balance of the myocardium and its correction using antiarrhythmics].

Watumiaji waliosajiliwa tu ndio wanaweza kutafsiri nakala

Ingia / Ingia

Changes in energetic balance (chi) during the transition of myocardium from norm to hypoxia and under antiarrhythmics effect were analysed on a mathematical model of the heart ventricle band. (chi-useful work/consumed energy ratio. Orciprenalin was shown to increase chi in the state close to the

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