[Effects of chronic administration of nifedipine on echo-Doppler parameters of left ventricular filling in hypertensive patients].
This study aimed determining the chronic effects of nifedipine (N) on left ventricular filling in 25 patients (mean age 55) with mild to moderate arterial hypertension. M-mode, B-mode and pulsed Doppler measurements were performed at baseline, after 30 min from administration of sublingual N (10 mg) and after 6 months of therapy with slow release N (max dose: 60 mg die). Acute and chronic N reduced significantly both systolic (p less than 0.001) and diastolic pressure (p less than 0.001). At the end of the treatment with slow release N, and septal wall thicknesses had a slight but significant decrease (p less than 0.01). Diastolic and systolic dimension were not modified. Left ventricular mass index decreased significantly from 141 +/- 34 to 130 +/- 31 g/m2 (p less than 0.05). The Doppler-derived diastolic filling indexes (peak E, ratio peak E/A,E deceleration) were abnormal at baseline, and had a significant increase after sublingual and chronic therapy. Changes in left ventricular mass index and diastolic filling indexes were not correlated. A significant correlation was found between peak E changes after acute and chronic N administration (r = 0.732 and p less than 0.001). The results of this study demonstrate that both acute and chronic administration of N modify transmitral flow velocity pattern, suggesting that, in hypertensive patients, left ventricular filling abnormalities are partly dynamic and reversible. Our findings also demonstrate that acute N effects may predict the chronic results.
Cattedra di Cardiologia, Università degli Studi, Parma.
C
C
Manca
A
A
Ghirarduzzi
S
S
Baccarini
A L
AL
Barilli
B
B
Bernardini
M
M
Bigoli
A
A
Piazza
C
C
Tomasi
R
R
Bolognesi
D000328:Adult; D000368:Aged; D015150:Echocardiography, Doppler; D005260:Female; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D006973:Hypertension / Q000000981:diagnostic imaging / Q000188:drug therapy* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009543:Nifedipine / Q000627:therapeutic use*
D009543:Nifedipine
Effetto della somministrazione cronica di nifedipina sui parametri eco-Doppler di riempimento ventricolare sinistro in pazienti ipertesi.