Could it be plausible that orthostatic intolerance could be related to orthostatic proteinuria urine in Nutcracker Syndrome compression to or the left kidney vein between the aorta & SMA?
I have an enlarged left kidney I cannot sleep or lie on my left side I also cannot lie down on my stomach the Flank Pain & lower left back, the pain is extreme. Nutcracker is usually found about one inch right side up of the left kidney in the vein.
The urine test is done in an orthostatic position collection 18 hours & 8 hours sleeping or lying down supine. blood clots are common as well many have them not all xx