Search

Resume Introduction. – La distensibilite est la capacite des grosses arteres elastiques a faire varier leur diametre de la diastole a la systole. Lˈune des methodes les plus validees pour la mesurer est la velocite de lˈonde de pouls (VOP), qui peut etre mesuree par divers procedes dont le QKd. Exegese. – Le QKd est lˈintervalle de temps compris entre lˈonde Q de lˈelectrocardiogramme et lˈenregistrement du deuxieme bruit de Korotkoff au niveau de lˈartere humerale, correspondant a la tension arterielle diastolique. Il est mesure par un holter tensionnel et electrocardiographique specifique (normale superieure a 200 ms). La distensibilite arterielle semble interessante pour predire les evenements cardiovasculaires. Il a ete montre que les hypertendus âges avec QKd altere font plus dˈevenements cardiovasculaires que les autres. Le QKd est a lˈetude comme predicteur de la progression des sclerodermies (etude ERAMS). Conclusion. – Le QKd est une methode non invasive et ambulatoire qui couple les mesures de distensibilite et de tension arterielle.

Distensibility is the ability of large elastic arteries to increase in diameter from diastole to systole. Pulse wave velocity (PWV) is one of the ways to measure this parameter. Several techniques, including QKd, are able to measure PWV.QKd is the time interval between the Q wave on EKG and auscultation of the second Korotkoff's sound at the brachial artery. QKd is measured by a specific apparatus that registers ambulatory blood pressure as well as EKG (normal200 ms). Arterial distensibility seems to be able to predict cardiovascular morbidity and QKd has been demonstrated to predict such morbidity in a sample of elderly hypertensives. Currently the relationship between QKd and prognosis is under investigation in systemic sclerosis (ERAMS study).QKd is a noninvasive ambulatory method that measures arterial distensibility as well as blood pressure.