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• W1978446507 abstract "We investigated whether vardenafil, a phosphodiesterase-5 inhibitor, alters plasma levels of asymmetric dimethylarginine (ADMA), symmetric dimethylarginine (SDMA), and arginine. ADMA, SDMA, and arginine were measured (0–540 min) in 12 patients with pulmonary hypertension after a single oral dose of vardenafil. Invasive hemodynamic data were collected at baseline and after 60 min. A reduction in ADMA was observed at 30 and 45 min with a median change of − 11.1% (P = 0.021) and − 12.5% (P = 0.002). SDMA decreased with a median − 5.3% change (P = 0.032) at 45 min. An increase in arginine, median 40.3% (P = 0.002), 45.0% (P = 0.010), and 77.1% (P = 0.008) was observed at 120, 300, and 540 min respectively. An increase in the arginine/ADMA ratio, median 11.7% (P = 0.012), 32.5% (P = 0.003), 26.5% (P = 0.021), 33% (P = 0.007), 48.5% (P = 0.007), and 63.1% (P = 0.008) was observed at 15, 45, 60, 120, 300, and 540 min respectively. There was a positive correlation between vardenafil exposure and the percent change in the arginine/ADMA ratio from baseline to 540 min (r = 0.80; P = 0.01). A correlation between baseline mean right atrial pressure (mRAP) and baseline ADMA (r = 0.65; P = 0.023), and baseline SDMA (r = 0.61; P = 0.035) was observed. A correlation between the baseline arginine/ADMA ratio and baseline cardiac output (CO) (r = 0.59; P = 0.045) and baseline cardiac index (CI) (r = 0.61; P = 0.036) was observed. Baseline arginine/ADMA ratio correlated with baseline mRAP (r = − 0.79; P = 0.002). A correlation between change (0–60 min) in CI and change in arginine (r = 0.77; P = 0.003) as well as change in the arginine/ADMA ratio (r = 0.61; P = 0.037) was observed. Vardenafil induced changes in ADMA, SDMA, arginine, and the arginine/ADMA ratio in patients with PH. An increase in arginine and the arginine/ADMA ratio was associated with improvement in CI." @default.
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• W1978446507 date "2015-10-01" @default.
• W1978446507 modified "2023-09-26" @default.
• W1978446507 title "Changes in plasma levels of asymmetric dimethylarginine, symmetric dimethylarginine, and arginine after a single dose of vardenafil in patients with pulmonary hypertension" @default.
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• W1978446507 doi "https://doi.org/10.1016/j.vph.2015.04.010" @default.
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