BACKGROUND The main purpose of this study is to determine the correlation of inter- and intraatrial conduction times between the electrophysiological and tissue Doppler echocardiographic measurements, and to evaluate the appropriateness of tissue Doppler echocardiography for this measurement. METHODS One-hundred and one patients were included in the study who underwent electrophysiological st...

Pulse oximetry (PO) and laser-Doppler fluxmetry (LDF) can be used for a determination of tooth vitality by measuring the pulpal blood perfusion. They offer an alternative to conventional sensibility tests, which evaluate only sensory function. The aim study was conduct tests on permanent caries-free carious teeth with different degrees caries progression compare results. In clinical study, 230 ...

As a result of an analysis of the autocovariance of the complex heterodyne lidar signal, some general-enough inverse techniques (algorithms) are derived for recovering with high range resolution, below the sensing pulse length, of Doppler-velocity profiles in the atmosphere. Unlike our preceding works, it is assumed here that the laser pulses can have arbitrary fluctuating shape. The presence i...

Doppler weather radar suffer from well known limitations associated with the trade off between range and velocity aliasing. This is particularly severe as the radar wavelength decreases. There are a number of operational 5 cm wavelength Doppler radars around the world and for reasonable maximum ranges of about 150 km, the unambiguous velocity is only about 13 ms. Automated processing techniques...

PURPOSE The goal of this study was to evaluate the effect of vascular compliance, resistance, and pulse rate on the resistive index (RI) by using an electrical circuit model to simulate renal blood flow. METHODS In order to analyze the renal arterial Doppler waveform, we modeled the renal blood-flow circuit with an equivalent simple electrical circuit containing resistance, inductance, and ca...

Introduction: There is ever increasing evidence to suggest that transradial catheterization is associated with fewer access site complications, shorter length of stay, and improved patient comfort. A principle concern remains the potential for radial artery occlusion (RAO) with a reported incidence ranging from 10-30%. One of the traditional methods used to diagnose radial artery occlusion is i...

BACKGROUND Transmitral Doppler flow indices are used to evaluate diastolic function. Recently, velocities measured by Doppler tissue imaging have been used as an index of left ventricular relaxation. OBJECTIVE To determine whether Doppler tissue velocities are influenced by alterations in preload. METHODS Left ventricular preload was altered in 17 patients (all men, mean (SD) age, 49 (8) ye...