ORLANDO – Results from the SPRINT hypertension trial are “truly practice changing,” by “giving us definitive clinical-trial evidence that an additional 15-18 mm Hg lowering of systolic blood pressure, aiming for a target of less than 120 mm Hg, translates into” a significantly reduced composite cardiovascular-event endpoint as well as significantly reduced all-cause death, Dr. Gregg C. Fonarow said in an interview at the American Heart Association scientific sessions.
The significant, 27% relative reduction in all-cause mortality in SPRINT in patients targeted to a systolic blood pressure of less than 120 mm Hg was especially notable because an all-cause mortality benefit is not typically seen with other interventions, and because it “ultimately demonstrates that the benefits clearly outweigh the potential risks,” said Dr. Fonarow, professor and associate chief of cardiology at the University of California, Los Angeles.
Dr. Fonarow acknowledged that results from SPRINT showed a more aggressive regimen also produced higher rates of certain important adverse effects, such as acute kidney injury. But the large incremental benefit in total mortality during the greater than 3 years of average follow-up showed the overwhelming net benefit from more aggressive antihypertensive treatment.
Less clear is whether the SPRINT results say anything about initiating antihypertensive treatment in a patients who resemble those enrolled in the trial and have an untreated systolic blood pressure of 130-139 mm Hg. While people like these could enter SPRINT, they constituted just under 10% of the enrolled population.
“The vast majority of patients in the trial met the conventional clinical definition of hypertension, with a systolic blood pressure of 140 mm Hg or greater and already on some treatment, and treating them to a systolic pressure of less than 120 mm Hg, usually by adding just one antihypertensive drug, translated into substantial clinical benefit,” Dr. Fonarow concluded. He also noted that a large subgroup, about 28% of enrolled patients, were at least 75 years old, and in these patients the more aggressive regimen was as safe and effective as in the entire study. “We have a spectacular result” for elderly patients, he said.
Dr. Fonarow had no disclosures.