Benidipine treatment for 1 year in hypertensive patients reduced real pulse wave velocity significantly more than the estimated decrease from blood pressure lowering alone (-17.4% vs -12.3%, p=0.028).
Does long-term benidipine therapy improve arterial stiffness beyond what can be accounted for by blood pressure lowering in hypertensive patients?
Long-term benidipine administration improves arterial wall properties and stiffness beyond the direct effects of blood pressure lowering.
Absolute Event Rate: -17.4% vs -12.3%
p-value: p=0.028
Pulse wave velocity (PWV) reflects arterial stiffness and is an independent predictor of cardiovascular mortality and morbidity. However, because it is closely related to blood pressure (BP), PWV is an imperfect measure for evaluating the effects of anti-hypertensive drugs on arterial wall properties. To clarify the effect of benidipine on arterial properties, we first derived the regression line between BP and PWV changes in a short-term experiment. Using this line, we evaluated the long-term effect of benidipine on PWV changes. In the short-term experiment, 29 participants were intravenously administered nicardipine for 90 min. Maximum decreases of brachial-ankle PWV (baPWV) were plotted against the corresponding decreases in BP. In the long-term experiment, 9 hypertensive patients were treated with benidipine for 1 year, during which BP and baPWV were monitored. After 1 year, benidipine was suspended for 2 weeks, and BP and baPWV were reevaluated. In the short-term experiment, PWV was dependent on BP only, and the equation of the regression line was deltaPWV (cm/s) =10.114 x deltaMBP (mmHg) (r=0.913) or deltaPWV (%) =0.719 x deltaMBP (%) (r=0.926). In the long-term therapy, benidipine treatment achieved stable BP control within 3 months; the real PWV decreases (r-PWV) were almost identical to the PWV decrease estimated (e-PWV) from BP lowering at 3 months. However, r-PWV exceeded e-PWV after 6 months. Relative BP and PWV improvements compared to the control were maintained 2 weeks after suspension of benidipine. In conclusion, long-term benidipine administration improves arterial wall properties beyond what can be accounted for by changes in BP.
Kita et al. (Sat,) conducted a other in Essential hypertension (n=9). Benidipine vs. Estimated PWV changes based on blood pressure reduction was evaluated on Percentage change in pulse wave velocity (PWV) at 12 months (p=0.028). Benidipine treatment for 1 year in hypertensive patients reduced real pulse wave velocity significantly more than the estimated decrease from blood pressure lowering alone (-17.4% vs -12.3%, p=0.028).