Management of Hypertension in Patients with Mild-to-Moderate Aortic Stenosis: Navigating the SEAS
The treatment of hypertension has been the subject of intense interest and debate over the last several years. Although a "lower is better strategy" has been adopted in clinical practice for many but not all patient cohorts, the boundary conditions for blood pressure treatment have not been rigorously established by clinical trials involving middle-aged and older adults with hypertension and other pre-specified cardiovascular (CV) disorders, such as acute coronary syndromes (ACS), heart failure and valvular heart disease (VHD). Concern remains that a J- or U-curve association between blood pressure and outcomes pertains among vulnerable patients with impaired coronary flow reserve and/or myocardial dysfunction. Excessive lowering of the diastolic blood pressure (DBP) may result in critical reductions in coronary perfusion pressure below the autoregulatory limit and render the heart ischemic, especially when myocardial oxygen demand is increased. Nevertheless, the evidence base is not uniformly consistent and issues such as confounding and reverse causality have been invoked to explain the observations made in some but not all trials. The deleterious effects of significantly elevated systolic (SBP) and/or DBP, however, across essentially all patient populations are not in question.
- Received July 10, 2016.
- Accepted July 12, 2016.