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Figure 4 Bar graphs show maximal forearm blood flow after sublingual administration of nitroglycerin (NTG) in patients with essential hypertension before (0 weeks) and after 2, 4, 8, 12, 24 and 48 weeks of treatment with the angiotensin-converting enzyme inhibitor imidapril and the calcium antagonist amlodipine. The NTG-induced vasodilation was similar for all treatment periods.
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