Corrections & clarifications: An earlier version of this report incorrectly reported the number of stroke deaths per year.
The risk of stroke increases with age. But it can be particularly dangerous for middle-age adults.
More than 795,000 Americans each year suffer a stroke. About 140,000 people die each year from stroke, the nation's fifth leading cause of death, according to the Centers for Disease Control and Prevention.
Doctors not involved in the "Beverly Hills, 90210" star's care said that middle-age adults such as Perry can face grave risk from brain swelling after a massive stroke.
"The immediate time after stroke is the most deadly for someone who is young," said Salman Azhar, director of stroke at Lenox Hill Hospital in New York City. That's because their brains have not yet shrunk, as they do in older adults.
"There is often times no space in the brain for the swelling to happen. That in and of itself can make these strokes more fatal in the young."
Ischemic stroke, often cause by a clot that blocks blood flow to the brain, account for 87 percent of strokes, according to the Centers for Disease Control and Prevention.
A hemorrhagic stroke, which can be more deadly, occurs when an artery in the brain leaks or ruptures. These types of strokes can be caused by conditions such as high blood pressure or aneurysms, according to the CDC.
Doctors have not said what type of stroke Perry suffered, but either could be fatal outcomes.
Perry was reportedly alert and talking to paramedics after his stroke last Wednesday, but his condition worsened after he was transported to the hospital.
"It is possible that he might have suffered a hemorrhagic stroke that expanded and caused further deterioration," said Shraddha Mainali, a neurologist at The Ohio State University Wexner Medical Center. "It’s also very possible he suffered an ischemic stroke."
Mainali said intense pressure within the cranium following an ischemic stroke can build to a peak three to five days after a stroke.
Azhar said younger and middle-age patients can suffer more intense pressure from swelling following a stroke because the brain shrinks as we age. Younger adults often have less space available to alleviate pressure.
"Swelling happens after every stroke," Azhar said. "That leads to shifting of brain compartments, leading to more brain damage and eventually death."
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Doctors have several options to alleviate pressure from swelling following a stroke, depending on the area of the brain that is affected.
They can remove part of the skull to alleviate pressure, Azhar said. They can use a scope-type device to remove blood, or try medications to "dry the brain out."
Risk factors for stroke include high blood pressure, high cholesterol, smoking, obesity, and diabetes. One in 3 U.S. adults has at least one of these conditions or habits.
When a stroke occurs, speed can save lives. People who get to a hospital within three hours of their first symptoms have less disability three months later than those for whom care was delayed, the CDC says.
African-Americans' risk for a first stroke is nearly twice as high as for whites. African-Americans have the highest death rate from stroke.
This article originally appeared on USA TODAY: Was Luke Perry too young to have a fatal stroke? Not really