Does intensive systolic blood pressure control affect the temporal relationship between arterial stiffness and systolic blood pressure in elderly hypertensive patients?
Arterial stiffening precedes systolic blood pressure changes and makes achieving intensive blood pressure targets more difficult, although intensive treatment attenuates age-related increases in arterial stiffness.
Background: Whether or not the temporal relationship between arterial stiffness and systolic blood pressure (SBP) is affected by how strictly SBP is controlled (intensive, 110–<130 mm Hg; standard, 130–<150 mm Hg) has been unclear. Methods: The temporal relationship between brachial-ankle pulse wave velocity (baPWV) and SBP was assessed using a cross-lagged panel model in the 5369 participants in the STEP trial (Strategy of Blood Pressure Intervention in the Elderly Hypertensive Patients) for whom baseline and follow-up baPWV data were complete. Results: Patients with arterial stiffening (baPWV≥1800 cm/s) at baseline were significantly less likely to achieve their target SBP than those without arterial stiffening in the intensive and standard treatment groups (65.17% versus 76.91% and 97.33% versus 98.96%, respectively, both P <0.05). The standardized regression coefficient from baseline baPWV to follow-up SBP was 0.05 (95% CI, 0.02–0.08; P <0.001) and that from baseline SBP to follow-up baPWV was insignificant from zero (β=−0.007 95% CI, −0.03 to 0.02; P =0.62) after adjustment for confounders. Conclusion: Arterial stiffening consistently preceded SBP in the intensive and standard groups, and it led to difficulty in reaching target SBP, particularly in the intensive treatment group. Besides, assignment to intensive treatment group was associated with an attenuation of the age-related increase in baPWV at 3-year follow-up. Registration: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT03015311.
Ling et al. (Mon,) studied this question.