In nature, methane is produced by the anaerobic bacterial decomposition of vegetable matter under water (where it is sometimes called marsh gas or swamp gas). Wetlands are the major natural source of methane produced in this way.
What are the exams and tests for renal artery stenosis? Blood tests. Screening blood tests may be done as part of the general evaluation of high blood pressure and may include a complete blood count, electrolytes, kidney function tests, and a urinalysis. Imaging. Renal artery narrowing can be detected with ultrasound or computerized tomography angiography or arteriography.
Renal artery stenosis is the narrowing of. one or both renal arteries. âRenalâ means. âkidneyâ and âstenosisâ means ânarrowing.â. The renal arteries are blood vessels that. carry blood to the kidneys from the aortaâ. the main blood vessel that carries blood. from the heart to arteries throughout the. body. RVH is high blood pressure caused by RAS. Blood pressure is written with two numbers.