When the velocity of capillary blood flow in the frog tongue declined to an intermediate range of 0.2-0.7 mm/s, the glossopharyngeal nerve stimulation induced a biphasic slow depolarizing and slow hyperpolarizing potential (HP) in taste cells. The objective of this work was to examine the generative mechanisms of the biphasic slow potentials. The biphasic slow response was always preceded by a ...

dear editor we read the article by bagheri et al with great interest (1). we found the study interesting and comprehensive as four groups of patients, including operative and nonoperative in either pure dislocation or fracture dislocation, were compared in terms of mayo wrist score, grip strength, range of motion and radiographic parameters. it seems that the results were comparable to studies ...

In conclusion, the diagnosis of DAA should be suspected in an infant with either biphasic stridor or feeding-related respiratory distress. Radiographic studies combined with appropriate thorough endoscopic evaluation should confirm clinical suspicion. Thoracotomy with surgical division of the DAA has given excellent long-term results.

KEY POINTS Ca leak from the sarcoplasmic reticulum through the ryanodine receptor (RyR) reduces the amplitude of the Ca transient and slows its rate of decay. In the presence of β-adrenergic stimulation, RyR-mediated Ca leak produces a biphasic decay of the Ca transient with a fast early phase and a slow late phase. Two forms of Ca leak have been studied, Ca-sensitising (induced by caffeine) an...

This study determined the response of action potentials during ventricular fibrillation (VF) to timed monophasic and biphasic shocks. A floating glass microelectrode was used to record intracellularly from the anterior right ventricle in 10 open-chest dogs. After 10 seconds of electrically induced VF, 5-millisecond monophasic and 2.5/2.5-millisecond biphasic shocks or 16-millisecond monophasic ...

A strong premature electrical stimulus (S(2)) induces both virtual anodes and virtual cathodes. The effects of virtual electrodes on intracellular Ca(2+) concentration ([Ca(2+)](i)) transients and ventricular fibrillation thresholds (VFTs) are unclear. We studied 16 isolated, Langendorff-perfused rabbit hearts with simultaneous voltage and [Ca(2+)](i) optical mapping and for vulnerable window d...

Recent studies suggest that 1) electrically induced fibrillation and defibrillation involve prolongation of refractoriness by the shock in addition to stimulation and 2) biphasic waveforms are more efficient for defibrillation than are comparable monophasic waveforms. The purpose of this study was to compare prolongation of action potential duration at 50% repolarization by monophasic and bipha...

Abstract Aims Interpretation of Doppler audio signals among non-podiatrist has not been thoroughly investigated. This study analyses the accuracy interpretation clinicians. Methods A single-centre prospective single blind was used. Clinicians in vascular department and with prior experience a district general hospital participated interpreting 15 12-second (5 monophasic, 5 biphasic triphasic) i...