In Part I of this review, we have covered basic concepts regarding cardiorespiratory interactions. Here, we put this theoretical framework to practical use. We describe mechanisms underlying Kussmaul’s sign and pulsus paradoxus. We review the literature on the use of respiratory variations of blood pressure to evaluate volume status. We show the possibilities of attaining the latter aim by investigating with ultrasonography how the geometry of great veins fluctuates with respiration. We provide a Guytonian analysis of the effects of PEEP on cardiac output. We terminate with some remarks on the potential of positive pressure breathing to induce acute cor pulmonale, and on the cardiovascular mechanisms that at times may underly the failure to wean a patient from the ventilator.
|Original language||English (US)|
|Title of host publication||Applied Physiology in Intensive Care Medicine 1|
|Subtitle of host publication||Physiological Notes - Technical Notes - Seminal Studies in Intensive Care, Third Edition|
|Publisher||Springer Berlin Heidelberg|
|Number of pages||8|
|State||Published - Jan 1 2012|
Bibliographical notePublisher Copyright:
© Springer-Verlag Berlin Heidelberg 2006, 2009, 2012.