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Determination of optimal on-treatment diastolic blood pressure range using automated measurements in subjects with cardiovascular disease-Analysis of a SPRINT trial subpopulation.

ABSTRACT: Automated office blood pressure measurement (AOBPM) is recommended for diagnosing hypertension; however, optimal treatment targets using this method are not established. Discrepancies between automated and office measurements of blood pressure have been described, producing uncertainty regarding the use of AOBPM in clinical practice. The Systolic Blood Pressure Intervention Trial (SPRINT) results improved our understanding of target AOBPM systolic blood pressure (SBP) levels; however, diastolic blood pressure (DBP) targets remain unknown. Therefore, we sought to determine the optimal on-treatment DBP range. The analysis was performed on the participants of the SPRINT trial who had hypertension and prior cardiovascular disease. We analyzed the data of 1470 participants (mean age 70.3 ± 9.3 years, 24.1% female) selected from the SPRINT trial database of National Heart, Lung and Blood Institute. The mean achieved SBP and DBP were 127.9 ± 10.7 and 68.3 ± 9.4 mm Hg, respectively. Most of the participants (57.4%) had a DBP lower than 70 mm Hg, while only 11.7% had DPB ≥80 mm Hg. Clinical composite endpoint was defined as myocardial infarction, acute coronary syndrome not resulting in myocardial infarction, stroke, acute decompensated heart failure or death from cardiovascular causes. There were 159 (10.8%) clinical endpoint events. The participants with on-treatment AOBPM DBP range of 68.6-78.6 mm Hg showed the lowest hazard risk of a clinical composite endpoint. These results correspond to the office DBP range of 70-80 mm Hg recommended in ESC guidelines. This is the first attempt to determine the range of optimal DBP values using population-based AOBPM in patients with prior cardiovascular disease.

SUBMITTER: Sobieraj P

PROVIDER: S-EPMC8030629 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:ImportanceExtremely low diastolic blood pressure has been reported to be associated with increased adverse cardiovascular events (ie, the diastolic J-shape phenomenon); however, current US guidelines recommend an intensive blood pressure target of less than 130/80 mm Hg without mentioning the lower limits of diastolic blood pressure.ObjectivesTo evaluate whether there is a diastolic J-shape phenomenon for patients with an treated systolic blood pressure of less than 130 mm Hg and to explore the safe and optimal diastolic blood pressure ranges for this patient population.Design, setting, and participantsThis cohort study analyzed outcome data of patients at high cardiovascular risk who were randomized to intensive or standard blood pressure control and achieved treated systolic blood pressure of less than 130 mm Hg in the Systolic Blood Pressure Intervention Trial (SPRINT) and Action to Control Cardiovascular Risk in Diabetes-Blood Pressure (ACCORD-BP) trial. Data were collected from October 2010 to August 2015 (SPRINT) and from September 1999 to June 2009 (ACCORD-BP). Data were analyzed from January to May 2020.ExposureTreated diastolic blood pressure, divided in intervals of less than 60, 60 to less than 70, 70 to less than 80, and 80 mm Hg and greater.Main outcomes and measuresThe primary outcome was a composite of all-cause death, nonfatal myocardial infarction, and nonfatal stroke. A composite cardiovascular outcome, including cardiovascular death, nonfatal myocardial infarction, and nonfatal stroke, was among the key secondary outcomes.ResultsA total of 7515 patients (mean [SD] age, 65.6 [8.7] years; 4553 [60.6%] men) were included in this analysis. The nominally lowest risk was observed at a diastolic blood pressure between 70 and 80 mm Hg for the primary outcome, the composite cardiovascular outcome, nonfatal myocardial infarction, and cardiovascular death. A mean diastolic blood pressure of less than 60 mm Hg was associated with significantly increased risk of the primary outcome (hazard ratio [HR], 1.46; 95% CI, 1.13-1.90; P = .004), the composite cardiovascular outcome (HR, 1.74; 95% CI, 1.26-2.41; P = .001), nonfatal myocardial infarction (HR, 1.73; 95% CI, 1.15-2.59; P = .008), and nonfatal stroke (HR, 2.67; 95% CI, 1.26-5.63; P = .01).Conclusions and relevanceThis cohort study found that lowering diastolic blood pressure to less than 60 mm Hg was associated with increased risk of cardiovascular events in patients with high cardiovascular risk and an treated systolic blood pressure less than 130 mm Hg. The finding that a diastolic blood pressure value between 70 and 80 mm Hg was an optimum target for this patient population merits further study.

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Determination of optimal on-treatment diastolic blood pressure range using automated measurements in subjects with cardiovascular disease-Analysis of a SPRINT trial subpopulation.

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