Effect of Negative Intrathoracic Pressure
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چکیده
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منابع مشابه
The Effect of Positive and Negative Intrathoracic Pr.es- Sure on Cardiac Output Axd Vex-ous Pressure in the Dog1
It has been shown (1) in the dog that the development of a large negative intrathoracic pressure is associated with a marked fall in superior vena caval pressure and a slight fall in jugular venous pressure, while the development of a large positive intrathoracic pressure is associated with a rise in peripheral venous and superior vena caval pressure. In a recent, paper (2) it was shown that wh...
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There are many factors, both intrinsic and extrinsic to the left ventricle, that can affect its function when negative intrathoracic pressure is imposed. In this study, we examined whether the left ventricular response to the afterload imposed by negative intrathoracic pressure was similar to that imposed by partial aortic constriction. We used steady-state right heart bypass to control pulmona...
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Investigating how intrathoracic pressure changes affect cerebral blood flow (CBF) is important for a clear interpretation of neuroimaging data in patients with abnormal respiratory physiology, intensive care patients receiving mechanical ventilation and in research paradigms that manipulate intrathoracic pressure. Here, we investigated the effect of experimentally increased and decreased intrat...
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PURPOSE OF REVIEW Recent advances in cardiopulmonary resuscitation have shed light on the importance of cardiorespiratory interactions during shock and cardiac arrest. This review focuses on recently published studies that evaluate factors that determine preload during chest compression, methods that can augment preload, and the detrimental effects of hyperventilation and interrupting chest com...
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Breathing against a continuous positive or negative pressure has been demonstrated to alter urine flow. Continuous positive pressure breathing is associated with a decrease in the rate of urine flow in dog (1) and man (2), whereas breathing against a constant negative pressure produces an increased rate of urine flow in the same species (1, 3). A decrease in urea clearance accompanies the antid...
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To simulate the immediate hemodynamic effect of negative intrathoracic pressure during obstructive apneas in congestive heart failure (CHF), without inducing confounding factors such as hypoxia and arousals from sleep, eight awake patients performed, at random, 15-s Mueller maneuvers (MM) at target intrathoracic pressures of -20 (MM -20) and -40 cmH2O (MM -40), confirmed by esophageal pressure,...
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تاریخ انتشار 2005