Varicose veins are caused by?

Varicose veins are caused by?

• A. Incompetent venous valves and rapid retrograde blood flow
• B. Arterial occlusion
• C. Lymphatic obstruction
• D. Atherosclerotic disease of the aorta

Answer: (A)

Varicose veins arise when the valves inside leg veins don’t close properly, allowing blood to reflux backward as you stand or move. This backward flow raises venous pressure, causing the superficial veins to stretch, dilate, and twist beneath the skin. Over time the vein walls lose elasticity and the valves fail even more, leading to chronic venous insufficiency and prominent varicosities. This venous reflux is the key process, not arterial blockage or lymphatic problems. Arterial occlusion blocks blood flow to tissues and causes pain and ischemia; lymphatic obstruction leads to swelling from fluid buildup without dilated superficial veins; and atherosclerotic disease of the aorta is an arterial problem affecting larger arteries, not the venous valves that produce varicose veins.

Varicose veins arise when the valves inside leg veins don’t close properly, allowing blood to reflux backward as you stand or move. This backward flow raises venous pressure, causing the superficial veins to stretch, dilate, and twist beneath the skin. Over time the vein walls lose elasticity and the valves fail even more, leading to chronic venous insufficiency and prominent varicosities. This venous reflux is the key process, not arterial blockage or lymphatic problems. Arterial occlusion blocks blood flow to tissues and causes pain and ischemia; lymphatic obstruction leads to swelling from fluid buildup without dilated superficial veins; and atherosclerotic disease of the aorta is an arterial problem affecting larger arteries, not the venous valves that produce varicose veins.