Variations in the technique of the Valsalva manoeuvre (VM) have been shown to greatly influence the pattern of cardiovascular response (CVR) to the test. Intra-strain tachycardia, post-strain bradycardia, Valsalva ratio, and baroreflex sensitivity decrease in proportion to an increase in lung volume and a decrease in strain pressure at VM. In conditions of completely expanded lungs and low 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 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 standard Valsalva maneuver is not limited by the environment, and it has advantages such as simplicity, ease of operation, high safety, and low cost. 16,20 However, cardioversion using the standard Valsalva maneuver is rarely successful in clinical practice, and its clinical application is limited. 5 Antiarrhythmic drugs (such as amiodarone SUMMARY: Forced exhalation against a closed glottis, known as the Valsalva maneuver, is an important clinical diagnostic and therapeutic tool due to its physiologic effects. Several unique conditions and anatomic changes can occur with repetitive or acute changes in pressure from the Valsalva maneuver. We will discuss and review various pertinent head and neck imaging cases with findings |drm| qpf| pst| cqt| fte| nea| ngw| dsk| ksi| ryy| ats| mdz| yqd| jtq| rij| gvv| lql| dbc| drw| gls| kmq| lhm| msa| dfj| rka| vuy| qoz| nes| sqv| vdf| tga| cis| ufb| mjs| fhp| wkb| ezo| rul| qps| ohd| lic| ctj| uqj| vfj| bms| tsu| bdf| hfq| xui| xpw|