One September afternoon in 2001, actress Sharon Stone was standing behind a sofa in her San Francisco home when she experienced what she describes as a "lightning bolt" to the head so painfully shocking that it knocked her to the carpet, where she lay unconscious. After an unknown amount of time, she came to on the other side of the sofa and shakily rose to her feet. She had a throbbing headache and felt confused.
Stone, then 43, was at the height of her career and in robust good health—or so she thought. She'd ruled at the box office for more than a decade, shooting to superstardom with a legendary turn in 1992's Basic Instinct. Her performance in Martin Scorsese's Casino in 1995 landed her an Oscar nomination, sealing her status as a gutsy, brainy actress whose beauty queen looks belied a steely toughness.
A rare brain bleed
That toughness would prove indispensable in the days, weeks, months, and years ahead. As she later learned, that lightning bolt was her brain hemorrhaging from a ruptured vertebral artery.
The vertebral arteries, located at the back of the neck, convey about 20 percent of the body's blood supply to the brain, along with the internal carotid arteries—and their good functioning is critical to life.
"The walls of these blood vessels are layered, like a croissant," says Mark J. Alberts, MD, physician-in-chief at the Hartford HealthCare Ayer Neuroscience Institute in Connecticut. "A tear happens when there is damage to the wall of the vessel or an inherited weakness. After the tear, blood may enter the wall of the artery, leading to a blood clot that blocks the entire vessel. Or a piece breaks off and goes into the brain. Either way, the result can be a stroke in many cases."
In 50 percent of cases, a preceding trauma—a car accident, a fall or blow to the head, or a neck injury—causes the tear, says Dr. Alberts. "In the other 50 percent of cases, it seems to happen for no apparent reason, although there may be an underlying genetic weakness."
Stone does not recall injuring herself in any way. Nor did she have any known risk factors for stroke. No migraines with aura. No high blood pressure or diabetes. No family history of stroke. And she didn't smoke. But she was under mounting emotional strain due to a crumbling marriage and a looming custody battle over Roan, her newly adopted son, who was still a toddler.
Delayed treatment
In her "discombobulated" state, Stone stumbled to her car in an attempt to seek help. She managed to get down the block, even as her leg and foot went numb. "I felt like I couldn't drive, so I stopped and started to cry." Some well-meaning neighbors helped her back to her house, where she was met by Roan's nanny. "I told her I couldn't speak, that I didn't know what was going on. She suggested I take an aspirin."
In her confused state, Stone did not think to call 911. She didn't end up in the emergency department until 72 hours after the onset of her symptoms.
Diagnostic puzzle
Once in the emergency department, the actress underwent advanced imaging tests, including a CT scan and CT angiogram. Normally an excellent tool for detecting brain hemorrhage, the scan failed to show anything in Stone's case.
"A CT scan is almost 100 percent sensitive in detecting a subarachnoid hemorrhage if done in the first six hours," explains Jonathan A. Edlow, MD, professor of emergency medicine at Harvard Medical School and vice chair of the department of emergency medicine at Beth Israel Deaconess Medical Center. "But as the hours pass, the scan's sensitivity decreases. That's because the bleeding usually stops and a flow of cerebrospinal fluid dilutes the blood, making a hemorrhage much more difficult to detect."
When a second CT angiogram revealed the rupture, surgeons performed an interventional procedure, during which they inserted a catheter via the groin into Stone's ruptured artery before releasing coils to induce clotting, or embolization.
The procedure, known as endovascular coiling, saved Stone's life. But she was not at all prepared for how drastically that life was about to change.