C-type natriuretic peptide and its relation to non-invasive indices of left ventricular function in patients with chronic heart failure.
C-type natriuretic peptide (CNP) significantly increases in chronic heart failure (CHF) patients as a function of clinical severity. Aim of this study was to evaluate in CHF patients the relationship between circulating CNP concentrations and echo-Doppler conventional indices of left ventricular (LV) function as well as less load independent parameters as dP/dt. LV ejection fraction (EF), left ventricular end-diastolic dimension (LVEDD) and LV dP/dt were evaluated together with plasma CNP levels in 38 patients with CHF and in 63 controls. CNP levels resulted significantly higher in CHF patients than in controls (7.19+/-0.59 pg/ml vs. 2.52+/-0.12 pg/ml, p<0.0001). A significant correlation between dP/dt and CNP levels (r=-0.61, p<0.0001) was observed. A good correlation with EF (r=-0.55, p<0.001) and a less significant relation with LVEDD (r=0.316, p<0.05) were also reported. When patients were divided according to dP/dt values a very significant difference in CNP levels was observed: Group I (<600, n=25) vs. Group II (>600, n=13): 8.46+/-0.69 and 4.75+/-0.75 pg/ml, respectively, p<0.001. This is the first study that reports a correlation between CNP and dP/dt in CHF patients, thus suggesting a possible role on cardiac contractility.
Del Ry
S
S
CNR Institute of Clinical Physiology, Laboratory of Cardiovascular Biochemistry, Via Giuseppe Moruzzi 1, 56124 Pisa, Italy. delry@ifc.cnr.it <delry@ifc.cnr.it>
Maltinti
M
M
Cabiati
M
M
Emdin
M
M
Giannessi
D
D
Morales
M A
MA
D002908:Chronic Disease; D015150:Echocardiography, Doppler / Q000379:methods; D005260:Female; D006333:Heart Failure / Q000097:blood* / Q000175:diagnosis / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D020098:Natriuretic Peptide, C-Type / Q000097:blood*; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D018487:Ventricular Dysfunction, Left / Q000097:blood / Q000503:physiopathology*
D020098:Natriuretic Peptide, C-Type