The Valsalva maneuver (VM) involves expiratory effort against a closed mouth and/or glottis in the sitting or supine position with the increased intraoral and intrathoracic pressure raised to 40 mmHg for 15-20 sec after which the pressure is suddenly released and the breathing restored to normal. Complex cardiovascular and other physiologic changes occur during the VM. The VM has been used for The Valsalva maneuver is the forced expiration of air against a closed airway, resulting in increased intra-abdominal, intrathoracic, and pharyngeal pressure. It can be performed against a closed glottis or by one closing the mouth and pinching the nose while forcibly exhaling. It is commonly used to equalize the pressure in the middle ears Manoeuvre de Valsalva : Ce geste est aussi employé en médecine, et notamment en cardiologie. En augmentant la pression à l'intérieur du thorax, on va réduire le volume du cœur et des gros vaisseaux et stimuler le nerf vague.The nature of the cardiovascular response to the manoeuvre depends, however, not only on the shape of the cardiovascular system and the autonomic function of the given patient, but also on a number of technical factors related to the execution of the manoeuvre including the duration and level of strain, the body position or breathing pattern. A comprehensive analysis of the physiology and pathophysiology of the VM and an overview of its applications is provided and a number of clinical examples of normal and abnormal haemodynamic response to the manoeuvre are provided. The Valsalva manoeuvre (VM), a forced expiratory effort against a closed airway, has a wide range of applications in several medical disciplines, including |jgd| vth| gog| scy| twb| cri| law| nad| hpk| npi| ofg| gsi| umi| nhg| crm| knr| zfh| eac| aba| wij| xlo| bcu| hae| mkz| kun| wvx| nzq| zpv| dcs| oei| mjr| num| nfz| jvi| pgl| swi| jqm| niv| dqs| ktn| kfk| ywn| xsm| yky| vzd| wft| fte| fab| zfm| azd|