Antihypertensive therapy and wave reflections.

Abstract

Studies of pulsatile arterial hemodynamics have emphasized that the pulsatile component of pulse pressure has two important characteristics: (i) it increases from central to peripheral arteries for a similar value of mean arterial pressure, and (ii) it is dominantly influenced by the amplitude and timing of the backward pressure wave. Although these important aspects of wave reflections have been poorly investigated in the field of hypertension, they may be easily studied noninvasively in humans on the basis of the analysis of the pulse wave contour of carotid and aortic blood pressure. Increased wave reflections returning toward the thoracic aorta during systole may have deleterious consequences on the structure and function of the heart. Some (but not all) antihypertensive drugs may contribute to decrease and/or to delay wave reflections in association with blood pressure reduction.