A stroke treatment mired in controversy mexican ground beef recipes casserole

For years, doctors had tried — and failed — to find a treatment that would preserve the brains of stroke patients. The task was starting to seem hopeless: once a clot blocked a blood vessel supplying the brain, its cells quickly began to die. Patients and their families could only pray that the damage would not be too severe.

But then a large federal clinical trial proved that a so-called clot-buster drug, tissue plasminogen activator, or TPA, could prevent brain injury after a stroke by opening up the blocked vessel. Lewandowski, an emergency medicine physician at henry ford health system in detroit and the trial’s principal investigator, was ecstatic.

He was wrong. That groundbreaking clinical trial concluded 22 years ago, yet lewandowski and others are still trying to explain the data to a powerful contingent of doubters.Cerebral hemorrhage

The skeptics teach medical students that TPA is dangerous, causing brain hemorrhages, and that the studies that found a benefit were deeply flawed. Better to just let a stroke run its course, they say.

It’s a perspective with real-world consequences. Close to 700,000 patients have strokes caused by blood clots each year and could be helped by TPA. Yet up to 30 percent of stroke victims who arrive at hospitals in time and are perfect candidates for it do not receive it.

The result: paralysis and muscle weakness; impaired cognition, speech or vision; emotional and behavioral dysfunction; and other permanent neurological injuries.

Stroke treatment guidelines issued by the american heart association and the american stroke association strongly endorse TPA for patients after they’ve been properly evaluated.Brain injury but treatment must start within three hours (in some cases, 4?1/2 hours) of the stroke’s onset — the sooner, the better.

A number of medical societies also endorse the treatment as highly effective in reducing disability. The drug can cause or exacerbate cerebral hemorrhage, or bleeding in the brain — a real risk. But in most stroke patients it prevents brain injury, and in any event, rates of cerebral hemorrhage have declined as doctors have gained experience over the years.

Without treatment, "many patients end up permanently disabled," said dr. Gregg C. Fonarow, a cardiologist at the university of california at los angeles. "The stroke neurologists who are involved in chronic care see the devastating consequences.

Emergency medicine

While the vocal disbelievers are a minority, it is increasingly easy for them to spread their message on social media, said dr. Edward C. Jauch, a professor of neurosciences at the medical university of south carolina.

"The way information and opinion is now communicated to the younger generation of physicians is much more through web and social media and less through peer review journals, journal clubs or live debates," jauch said.

Dr. Charles R. Wira III, a professor of emergency medicine at yale, said that when he talked to residents about TPA, they often start citing blogs and podcasts "as the divine word for why TPA is harmful," he said. "They have not read the articles or practice guidelines."

Skepticism has spread around the world, jauch said, and he has come to expect naysayers wherever he goes.Emergency medicine in saudi arabia, where he was lecturing at a conference, a saudi doctor said over dinner that he simply did not believe in TPA.

A leader of the skeptical contingent, dr. Jerome hoffman, an emergency medicine specialist and emeritus professor at UCLA, believes that while the initial trial and a second one were positive, both were flawed. And 11 other studies did not show a benefit, hoffman says. But supporters note that those studies were meant to investigate whether TPA might help patients with more severe strokes or those outside the recommended window of time.

A charismatic, riveting speaker, hoffman has given educational courses across the country and sold informational tapes expounding his theory. And his influence has spread.

For neurologists, the worst scenario by far is the patient who is never even asked if he or she wants the clot-buster.Cerebral hemorrhage at yale, wira said, patients sometimes are transferred from community hospitals where they have not received TPA. Usually, it’s far too late to try.

Wira and other staffers do not tell the family about the missed opportunity. "We try not to raise issues that may lead to litigation," he said.

About a decade ago, lewandowski was at work when he got a call that his father had had a stroke and that his right side was paralyzed. But his father had gotten to the hospital within 45 minutes, well inside the window to receive TPA.

Lewandowski told his mother to make the family’s wishes very clear. They wanted the emergency room doctor to give the clot-buster to his dad. The doctor refused.

"I got in my car and drove 400 miles to the hospital," he recalled.Cerebral hemorrhage but by the time he got there, it was too late. The treatment window had closed.

His father had a facial droop and slurred speech. His right arm and right leg flopped about uselessly. His stroke scale was 7, moderately disabling, but he survived for a few more years.

"It was very difficult for me personally," lewandowski recalled. "I had spent so much of my professional life working on this treatment. It actually worked."