نتایج جستجو برای: intermittent negative pressure
تعداد نتایج: 951190 فیلتر نتایج به سال:
Obstructive sleep apnea is characterized by repetitive collapses of the upper airway, negative thoracic pressure periods, and intermittent hypoxia, stimulating the autonomic nervous system. The increased sympathetic drive during obstructive sleep apnea results in postapneic blood pressure rises and neurohumoral activation potentially involved in the initiation and progression to permanent atria...
Obstructive sleep apnea (OSA) is a common disorder with serious cardiovascular consequences. The pathogenesis in this context is likely to be multifactorial process including large negative swings in intrathoracic pressure, intermittent hypoxemia and hypercapnia, increased sympathetic nervous system activity, vascular endothelial dysfunction, oxidative stress, systemic inflammation, excessive p...
Dynamic preload assessment tests, especially pulse pressure variation (PPV) and stroke volume variation (SVV), are increasingly acknowledged in mechanically ventilated patients as being predictors of fluid responsiveness. However, the limitations of this method are often neglected or overlooked. One of the prerequisites for PPV and SVV evaluation, in addition to intermittent positive pressure v...
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