ummary: Intermittent methohexitone for conservative dentistry has been shown to cause clinically undetectable respiratory obstruction, depression of the laryngeal reflex, and arterial hypoxaemia. Because of the pronounced decrease in total peripheral resistance, the blood pressure was maintained only by large increases in cardiac output. Furthermore, the output of the heart could not increase w...

AIMS To investigate the contribution of dysfunction of maternal hemodynamics to renal impairment in preeclampsia (PE). METHODS Urinary protein excretion, serum creatinine, blood urea nitrogen, uric acid, and glomerular filtration rate were assessed in 571 pregnant women with PE in addition to and noninvasive hemodynamic monitoring. Patients were classified into two groups: PE with renal impai...

Bilateral electrolytic lesions of the anterior hypothalamus in unrestrained rats resulted in the development, within 2 hours, of arterial hypertension, tachycardia, hyperthermia, and increased locomotor activity, often leading to pulmonary edema and death. Similar lesions in paralyzed, artificially ventilated rats produced comparable changes in arterial blood pressure and body temperature with ...

Graphene devices for radio frequency (RF) applications are of great interest due to their excellent carrier mobility and saturation velocity. However, the insufficient current saturation in graphene field effect transistors (FETs) is a barrier preventing enhancements of the maximum oscillation frequency and voltage gain, both of which should be improved for RF transistors. Achieving a high outp...

The effects of substituting an infusion of salbutamol for isoprenaline were studied in 12 patients needing circulatory support after valve replacement surgery. The cardiac output rose while the heart rate remained unaltered. There was a reduction in systemic vascular resistance, and though the oxygen uptake tended to rise the increase in cardiac output was proportionately greater so that the ar...

The objective of this paper is to study the effect of the internal transducer resistance on the dynamic behaviour and the output power of an energy harvester when it is attached to a cubic load resistance. It is seen that by considering the internal resistance, the dynamic equation of a conventional nonlinear energy harvester changes so that it is not easy to separate the linear damping from th...

Simultaneous regional blood flow and resistance measurements were made in 21 organs in 11 supine unanesthetized rhesus monkeys before and during two different d ses of intravenously infused angiotensin II or saline. Systemic arterial pressure and total peripheral resistance significantly increased at both infusion rates in the six experimental monkeys, compared with changes in five control monk...

Essential hypertension is closely related to conditions with impaired glucose tolerance and hyperinsulinemia. To evaluate a possible interaction between the sympathetic nervous system and carbohydrate ingestion on the circulatory responses to psychosocial stress, we compared the hemodynamic effects of an oral glucose challenge with those observed after placebo in 10 glucose-tolerant, normotensi...

A novel ultra-high compliance, low power, very accurate and high output impedance current output stage (COS) with extremely high output current drive capability is proposed in this paper. The principle of operation of this unique structure is discussed, its most important formulas are derived and its outstanding performance is verified by HSPICE simulation in TSMC 0.18µm CMOS, BSIM3, and Level4...

The operation of gallium arsenide schottky barrier field effect transistor is greatly affected by several anomalies such as frequency dispersion of output impedance, zds; this low frequency behaviour is related to the presence of capture centres at the channel/substrate interface. In this context, we investigate the influence of such defects via a circuit consisting of a capacitance in series w...