Aiming lower saves more lives when it comes to controlling high blood pressure, says a major new study that could spur doctors to more aggressively treat patients over 50.

Patients who got their blood pressure well below today's usually recommended level significantly cut their risk of heart disease and death, the National Institutes of Health announced Friday. The benefit was strong enough that NIH stopped the study about a year early.

"This study provides potentially life-saving information," declared Dr. Gary Gibbons, director of NIH's National Heart, Lung and Blood Institute.

Doctors have long debated how low blood-pressure patients need to go, especially as they get older. Friday's results are preliminary, and researchers stressed that they shouldn't alter patient care just yet. But if the full results pan out, they eventually could influence treatment guidelines.... Read More: ABC News