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Representative tracings of real-time nitric oxide concentration in the dilated cardiomyopathy and control groups. Representative tracings of plasma nitric oxide concentration in the great cardiac vein after infusion of (A) ACh 0.3 µg, (B) ACh 3 µg, (C) ACh 30 µg, (D) l-NMMA 200 µmol, and (E) l-NMMA 200 µmol + ACh 30 µg.
