Reflux, venous - Altmeyers Encyclopedia - Department Vascular medicine

Definition
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Retrograde (in pathological direction) venous blood flow of abnormal duration in any type of venous segment. The blood flow is directed from central to peripheral in case of venous valve insufficiency. S.u. Chronic venous insufficiency.3 forms are distinguished:

Primary reflux (caused by an idiopathic dysfunction of the venous valves)
Secondary reflux (damage to the venous valve due to thrombosis, trauma, mechanical or chemical damage)
Congenital reflux (congenital absence or abnormal development of the venous valves).