This study compares the performance of three detection algorithms for the recognition of atrial fibrillation in chronic pacing leads. Multiple serial recordings were obtained of wideband and filtered electrograms from chronic atrial and ventricular leads in dogs for a period up to 55 days following implantation. Each dog was recorded in sinus rhythm and induced atrial fibrillation. Four days we...

A 65-year-old woman with a history of high blood pressure, diabetes mellitus, hyperlipidemia, chronic kidney disease, and stroke went to a walk-in clinic complaining of intermittent neck, left shoulder, and arm pain for several days. After being diagnosed with pneumonia and started on antibiotics, the patient went home. Th e pain became worse and constant 2 days later, and several hours thereaf...

This study aimed to examine the performance characteristics of a step test with stipulated tempos, used to evaluate the dynamic balance ability of the elderly, as well as the relationship between this step test and walking ability. Ninety-two healthy older women (age 70.9+/-6.1 yr) who could walk independently, twice performed a 10 m walk at maximum speed and a step test for 20 sec with varying...

The slow (<1 Hz) rhythm is a defining feature of the electroencephalogram during sleep. Since cortical circuits can generate this rhythm in isolation, it is assumed that the accompanying slow oscillation in thalamocortical (TC) neurons is largely a passive reflection of neocortical activity. Here we show, however, that by activating the metabotropic glutamate receptor (mGluR), mGluR1a, cortical...

background motion artifacts that degrade image quality of coronary ct angiography (ccta) in patients with high heart rates may be reduced with specific automatic motion correction algorithms (amc). conclusions ccta image quality improves significantly with amc in patients with high heart rates and reduces the proportion of non-diagnostic examinations. results mean heart rate during ccta was 61 ...

Aim. There is no consensus about the normal fetal heart rate. Current international guidelines recommend for the normal fetal heart rate (FHR) baseline different ranges of 110 to 150 beats per minute (bpm) or 110 to 160 bpm. We started with a precise definition of "normality" and performed a retrospective computerized analysis of electronically recorded FHR tracings. Methods. We analyzed all re...

OBJECTIVES In patients with heart failure (HF), peak oxygen consumption (peak VO(2)), the relationship between minute ventilation and carbon dioxide production (VE/VCO(2) slope) and heart rate recovery (HRR) are established prognostic predictors. However, treadmill exercise has been shown to elicit higher peak VO(2) values than bicycle exercise. We sought to assess whether the VE/VCO(2) slope a...

Large groups of poultry, including ducks and turkeys, are killed for disease control purposes with CO2. In this study, we examined the physiological reaction of White Pekin ducks and turkeys to increasing CO2 concentrations. Additionally, we examined the suitability of killing both species with increasing CO2 concentrations. Blood gas values showed similar reaction patterns for both species: a ...