Alterations of venous drug reactivity in humans: acquired and genetic factors.

Until recently, studies dealing with veins have almost always been the neglected part of vascular research. Recent data show an increasing rate of venous disease, and increasing evidence supports a role for veins in systemic diseases. The authors discuss and comment on findings of recent studies on venous drug reactivity. Alterations in venous reactivity to alpha- and beta-adrenergic, NO-dependent, and other drugs have been shown in many genetically determined and acquired conditions, such as hypertension, smoking, and aging. In some of them, the changes of venous responsiveness are most likely secondary to another process, while in others the they seem to play a primary role in the development of systemic disease states. Studying the drug reactivity of the venous system more extensively provides useful information for clinicians and researchers and will no doubt help to further knowledge of the normal and pathologic processes of the vasculature.