Updated guidelines on the management of intracerebral hemorrhage reflect a wealth of new findings on diagnosing and treating the condition, according to Dr. Joseph Broderick, who chaired the guideline writing committee.
The guidelines, issued jointly by the American Heart Association (AHA) and the American Stroke Association (ASA) and published online, reflect “the recent dramatic increase in clinical trials of ICH/IVH [intracerebral hemorrhage/intraventricular hemorrhage]” whose initial findings “provide great hope for new and effective treatments,” wrote Dr. Broderick, professor and chair of neurology at the University of Cincinnati, and colleagues (DOI: 10.1161/STROKEAHA.107.183689). The last AHA/ASA guidelines were issued in 1999. Since then, 15 pilot and larger randomized medical and surgical trials for ICH/IVH have been completed or are ongoing.
“I feel much better about where we are with intracerebral hemorrhage,” Dr. Broderick said in an interview. “In general, the critical care of these patients is much improved … so I think we're making progress.”
Probably one of the biggest changes in the new guidelines is that the role of surgery for ICH now is more limited than it was previously, said Dr. Broderick.
In addressing the feasibility and timing of surgical options, the guidelines relied heavily on the International Surgical Trial in Intracerebral Hemorrhage (STICH) (Lancet 2005; 365:387–97) and other smaller trials that suggested that surgery is not helpful in treating most supratentorial ICH and is probably harmful in coma patients.
However, “surgery—particularly craniotomy—may be helpful in treating those lobar clots within 1 cm of the surface that present in patients with milder deficits,” wrote the authors. Additionally, surgical removal of cerebellar hemorrhages greater than 3 cm in size is recommended in patients “who are deteriorating neurologically or who have brain stem compression and/or hydrocephalus from ventricular obstruction.” This is a class I recommendation, meaning “there is evidence for and/or general agreement that the procedure or treatment is useful and effective.” Minimally invasive ways to remove clots are also under investigation.
In terms of medical management of ICH, the new guidelines suggest that recombinant activated factor VII (rFVIIa) is a potential new treatment. Administered within 4 hours of the ICH, rFVIIa may limit bleeding, reduce mortality, and improve patients' functional outcome at 90 days. However, the results of the rFVIIa in Acute Hemorrhagic Stroke Treatment (FAST) trial, presented last month at the American Academy of Neurology meeting in Boston, showed no reduction in the rates of mortality or severe disability with either of two doses of the drug, a lthough it did reduce hematoma growth by up to 50% more than placebo.
“We have to rethink where and on whom we want to use this. What's important for right now is that use of factor VII should only be done in the context of a clinical trial,” said Dr. Broderick.
He added that the trial investigators were disappointed not to have found the same clinical effect of rFVIIa that had been found in a previous phase II trial, “which was actually a very prominent effect, but now we know we have a medication that actually slows bleeding. … If you can stop the bleeding—and we know continued bleeding is related to [a] bad outcome—we have a chance to change the natural history of the disease. But we have to do that in the first several hours, likely.”
Blood pressure management, although addressed with some suggestions in the guidelines, remains an open question awaiting the results of some ongoing clinical trials. “The primary rationale for lowering blood pressure is to avoid hemorrhagic expansion from potential sites of bleeding,” wrote the authors. However, for primary ICH, “little prospective evidence exists to support a specific blood pressure threshold,” they noted. “Until ongoing trials of blood pressure intervention for ICH are completed, physicians must manage blood pressure on the basis of the present incomplete evidence.”
Recommendations for imaging have changed from the previous guidelines. “Before, a CT scan was the primary option for evaluating stroke patients in an emergency,” said Dr. Broderick. “Data now show that MR scans also do the job, and both are first-choice options,” each carrying a class I recommendation. Specifically, “CT may be superior at demonstrating associated ventricular extension, whereas magnetic resonance imaging … is superior at detecting underlying structural lesions and delineating the amount of perihematomal edema and herniation,” say the guidelines.
For the first time, the guidelines address end-of-life issues and withdrawal of care. “This is the first time the guidelines try to address how and when physicians should discuss 'do-not-resuscitate (DNR)' orders,” said Dr. Broderick. DNR orders are often inappropriately associated with a lack of aggressive care in the first 24 hours following ICH, a trend the guidelines aim to change, he said. The class II (conflicting evidence and/or a divergence of opinion about the usefulness/efficacy of a procedure or treatment) recommendation urges “careful consideration of aggressive full care” in the first 24 hours, and that new DNR orders during that time be postponed.