BACKGROUND Previous studies show that the rise in skin blood flow and cutaneous vascular conductance during heat stress is substantially attenuated in chronic heart failure (CHF) patients. The mechanisms responsible for this finding are not clear. In particular, little is known regarding the responses of skin sympathetic nerve activity (SSNA) that control the skin blood flow during heat stress ...

BACKGROUND Conventional guidewires are not suitable for use during cardiovascular magnetic resonance (CMR) catheterization. They employ metallic shafts for mechanical performance, but which are conductors subject to radiofrequency (RF) induced heating. To date, non-metallic CMR guidewire designs have provided inadequate mechanical support, trackability, and torquability. We propose a metallic g...

Hyperthermia induces hyperventilation and cerebral hypoperfusion in resting humans. We tested the hypothesis that short-term exercise-heat acclimation would alleviate those effects. Twenty healthy male subjects were divided into two groups that performed exercise training in the heat (TR-HEAT, n = 10) or cold (TR-COLD, n = 10). Before and after the training, the subjects in both groups particip...

The seasonal thermal energy storage technology for domestic heating applications is not enjoying the same increasing market penetration as the smaller diurnal thermal energy storage technology. Although high efficiencies are to expect with seasonal thermal energy storages, high up-front costs are likely to constitute an efficient market barrier, impeding the growth of this technology. This pape...

Passive solar design is an economical way of using solar energy in buildings. The thermal behavior of the buildings within its environment over a period of time can easily be predicted using accurate and simple analytical tools. This provides designers the information necessary to satisfy the occupant’s needs, reduce peak cooling/heating power demands, reduce the size of air conditioning/heatin...

Passive solar heating is presently a major concern of Romania groups working on building research and design. The first theoretical and experimental research studies were worked out in INCERC and used the following experimental bases: the INCERC 1 solar cabin (1974), the Campina solar houses (1976, 1977), the solar apartment buildings in Medgidia (1981) and CS 3 Bucharest solar house at INCERC ...

Reflex vasodilation is attenuated in aged skin during hyperthermia. We used laser-Doppler imaging (LDI) to test the hypothesis that the magnitude of conductance and the spatial distribution of vasodilation are altered with aging. LDI of forearm skin was compared in 12 young (19- to 29-yr-old) and 12 older (64- to 75-yr-old) men during supine passive heating. Additionally, iontophoresis of brety...

The present study aimed to investigate the chronic effects of caudal artery sympathectomy on thermoregulatory adjustments induced by passive heating. Male Wistar rats were subjected to two surgical procedures: caudal artery denervation (CAD) or sham surgery (Sham-CAD) and intraperitoneal implantation of a temperature sensor. On the day of the experiments, the animals were exposed to an ambient ...

This study analyzes the performance of a case study of low energy house built in Östersund (lat. 63°N), Sweden. The building is a semi detached house for two families, with each apartment having a floor space of 160 m divided on two floors. The building was constructed during 2010 according to the Swedish passive house principles with design that meet the requirements for Swedish ...