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Vasovagal syncope
(or reflex syncope, or neurocardiogenic syncope, or common faint, or blackout)
It is so frequent that it could not be a desease. When you know the basic cardiovascular physiology, you understand that standing is a challenge for the cardiovascular regulation. Trully speaking, vasovagal syncope remains a medical mystery! The vasovagal episodes occur mainly while standing (they could occur even supine). A head-up tilt test (picture) is sometime needed to manage patients with iterative vasovagal syncope
Click here to learn more about vasovagal syncope and head-up tilt test, or here to watch a collapse on TV
Diseases linked to the cardiovascular system in the standing position
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Nutcracker syndrom
The left renal vein goes between the abdominal aorta and superior mesenteric artery. Aorta and the superior mesenteric artery make a pincer because of the direction of the superior mesenteric artery (down and in the front). The pincer closes while standing in some people. Then the blood cannot escape from the left kidney that is under pressure. That is painful. The diagnosis is easy thanks to the differential results of urinary tests after a period of supine position (normal) and after a period of standing position (proteins and blood).
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More diseases
Varicose veins
Normal Varicose veins
In the normal situation, the venous blood of lower limbs can only go up back to the heart thanks to vein valvules. When the leg muscles contract, they also squeeze the veins, pushing the blood up.
If we stand for long periods of time during our life, the veins enlarge, the valvules become less efficient, and the venous blood can go both up and down. We feel pain in our legs after long periods of standing. The small veins also enlarge. We can see them just below the skin: that is vericose veins.
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