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- W1984848004 abstract "Nitric oxide (NO) is a free radical that is elevated in the plasma of patients with systolic heart failure. However, its relation to diastolic function is unknown. This study investigated the relation between the level of stable end-products of plasma NO (NOx level) and diastolic function in patients with heart failure. We performed echocardiographic Doppler studies in 76 patients (mean age of 66 +/- 10 years, 75% men) with congestive heart failure. Left ventricular (LV) diastolic dysfunction was classified as either a restrictive (RFP) or nonrestrictive filling pattern (non-RFP). Same day venous total nitrite plus nitrate levels were measured by chemiluminscence. Both patients with isolated diastolic heart failure (ejection fraction >50%) (77 +/- 9 micromol/L, n = 33) and systolic failure (ejection fraction < or = 50%) (115 +/- 17 micromol/L, n = 43) had significantly higher plasma NOx levels than controls (37 +/- 2 micromol/L, both p <0.001). RFP coexists mostly in patients with systolic heart failure (15 of 18), and these patients had a higher NOx level than patients with systolic failure and a non-RFP (n = 28) (163 +/- 35 vs 88 +/- 16 micromol/L, p <0.05). Patients who were not on oral nitrate drugs had insignificant lower plasma NOx levels than those on regular nitrate therapy, although it was still higher than controls. Plasma NOx level did not correlate with LV ejection fraction. Stepwise multiple regression analysis confirmed that the presence of RFP was the only independent predictor of NOx, and hence NO production. Plasma NOx level is elevated in patients with isolated diastolic heart failure. In addition, in patients with LV systolic failure, the severity of LV diastolic dysfunction determines the amount of NO production." @default.
- W1984848004 created "2016-06-24" @default.
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- W1984848004 date "2001-10-01" @default.
- W1984848004 modified "2023-10-14" @default.
- W1984848004 title "Plasma nitric oxide level in heart failure secondary to left ventricular diastolic dysfunction" @default.
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- W1984848004 doi "https://doi.org/10.1016/s0002-9149(01)01894-x" @default.
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