Manageable risk
The pattern of safety events in the final analysis was similar to the 2015 report. In the intervention period, rates of serious adverse events overall did not differ significantly between the groups. However, rates of hypotension, electrolyte abnormalities, syncope (none leading to injurious falls), and acute kidney injury were higher in the intensive-treatment group.
As in other SPRINT reports, “acute kidney injury safety events were generally mild and there was nearly complete recovery of kidney function within 1 year,” Dr. Lewis said. “This and other analyses we have published indicate this is probably a hemodynamic effect.”
“Intensive treatment can be well tolerated and is generally safe with proper patient selection and monitoring. There are advantages to intensive therapy, and some risks, but I don’t think the risks are such that we should just throw the idea of more intensive treatment out the window,” Dr. Lewis said.
Reached for comment, Carlos G. Santos-Gallego, MD, from the Icahn School of Medicine at Mount Sinai in New York, said there has been “controversy” over whether intensive blood pressure control targeting systolic to below 120 mm Hg is beneficial.
“The original SPRINT trial is incredibly important, in that it conclusively demonstrated that among patients with hypertension and increased cardiovascular risk, targeting systolic blood pressure to below 120 mm Hg resulted in lower rates of adverse cardiovascular events and, importantly, all-cause mortality," compared with the conventional target of 140 mm Hg, he said in an interview.
“This final report of the SPRINT trial basically consolidates, confirms, and corroborates the original SPRINT data,” he noted. However, the final data are “more robust, with additional primary outcome events and all events having been adjudicated by a central committee, and there is an additional observation period of 1 extra year in which the treatment has been discontinued,” he said.
“Over time, we are becoming more and more certain that lower is better with blood pressure. We still have a long way to go, but the cardiology community is slowly becoming more intense in our treatment of blood pressure for our patients,” Dr. Santos-Gallego said.
The potential adverse effects of intensive blood pressure control are “very manageable,” he added.
Support for SPRINT was provided by the National Institutes of Health. Full disclosures for authors are available in the original article. Dr. Santos-Gallego has no relevant disclosures.
A version of this article first appeared on Medscape.com.