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Figure 5 Line graphs show forearm blood flow at rest and during reactive hyperemia (RH) after infusion of NG-monomethyl-L-arginine (L-NMMA) in patients with essential hypertension before (0 weeks) and after 12 weeks of treatment with the angiotensin-converting enzyme inhibitor imidapril and the calcium antagonist amlodipine. L-NMMA abolished the enhancement of RH in hypertensive patients treated with imidapril.
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