View clinical trials related to Vasospasm, Intracranial.
Filter by:Rupture of brain aneurysms is a common cause of death and disability, accounting for as many as 10% of stroke cases in the United States. While much of the resulting injury to the nervous system is caused by the initial bleeding from the aneurysm, many of these patients develop cerebral vasospasm, pathological constriction of the blood vessels supplying the brain, several days following hemorrhage. As many as a third of patients can suffer a resulting neurological deficit and stroke, presumably caused by the decreased blood flow to the brain (ischemia). This delayed brain injury accounts for a significant percentage of poor outcomes following aneurysm rupture. Studies have shown that remote ischemia to many organs can precondition other tissues (including the brain) to be more tolerant to decreases in blood flow. This "remote ischemic preconditioning" has the promise of protecting the brain from ischemic injury. Whereas in other forms of stroke the onset of ischemia cannot be predicted in the general population, following aneurysm rupture the investigators know which patients are likely to develop vasospasm and when. Therefore, ischemic preconditioning following aneurysm rupture may help prevent some of the ischemic injury caused by vasospasm. Remote ischemic preconditioning by transient limb ischemia (produced by inflation of a blood pressure cuff on the arm or leg) has been shown to minimize injury to other organs, most notably the heart. Remote ischemic preconditioning of the brain following aneurysm rupture has not yet been investigated.
A Randomized Clinical Trial with security and dose testing of Sildenafil Citrate in patients with subarachnoid hemorrhage due to a rupture of a cerebral aneurism for prevention of cerebral vasospasm. The cerebral vasospasm is a decrease in blood flow that occurs when the intracranial vessels lose their capability of self-control of dilations and contractions. Patients with subarachnoid hemorrhage without neurological deficits who underwent endovascular or surgical correction of the aneurysm can participate in this trial. They will be randomized to a daily doses of 75 mg of Sildenafil, 150 mg of Sildenafil or Placebo from the third to the 14th day post bleeding. Today there is no proven clinical treatment for prevention of cerebral vasospasm.
Subarachnoid hemorrhage (SAH) is a devastating acute brain injury due to bleeding onto the brain surface from a ruptured aneurysm. Cerebral vasospasm (cVSP; critical narrowing of brain arteries) is a known complication after SAH and significantly increases disability and death after SAH. Vasospasm is difficult to treat and can lead to stroke. Animal studies have shown that the muscles in the artery wall play a role in cVSP. Dantrolene has been FDA approved and extensively used in clinical practice as a muscle relaxant for more than 30 years. It has been shown to provide some benefit in animal studies of cVSP, as well as in a small number of humans. However, the first human studies have only been observational and over a short period of time. This study will evaluate the safety and tolerability of intravenous dantrolene given every 6 hours over seven days to patients with or at risk for cVSP after SAH. The goal is to determine if future efficacy studies should be done to determine if treatment with Dantrolene may improve the outcome of patients with cVSP after SAH.
Subarachnoid hemorrhage (SAH) is a devastating acute brain injury due to bleeding onto the brain surface from a ruptured aneurysm. Cerebral vasospasm (cVSP; critical narrowing of brain arteries) is a known complication after SAH and significantly increases disability and death after SAH. Vasospasm is difficult to treat and can lead to stroke. Animal studies have shown that the muscles in the artery wall play a role in cVSP. Dantrolene has been FDA approved and extensively used in clinical practice as a muscle relaxant for more than 30 years. It has been shown to provide some benefit in animal studies of cVSP, as well as in a small number of humans. Therefore, we plan to undertake this study to evaluate the safety and tolerability of treatment with dantrolene in patients with cVSP after SAH, and to determine the maximal tolerated dose to be used in future studies to determine if treatment with Dantrolene can improve the outcome of patients with cVSP after SAH.
Cerebral vasospasm is a devastating complication of subarachnoid hemorrhage after cerebral aneurysm rupture leading to cerebral ischemia and potentially cerebral infarction. The current gold standard diagnostic imaging study for cerebral vasospasm is catheter cerebral angiography, an invasive diagnostic procedure carrying a complication rate of 1-2% per procedure. Computed tomographic perfusion imaging (CTP) and computed tomographic angiography (CTA) are noninvasive diagnostic imaging studies frequently utilized in the evaluation of embolic and thrombotic cerebral infarct. The investigators hypothesize that CTP and CTA may be utilized as screening tools for cerebral vasospasm following aneurysmal subarachnoid hemorrhage requiring treatment and provide prognostic information.
To evaluate the feasibility of performing a cervical sympathetic block in patients with severe cerebral vasospasm involving the anterior cerebral circulation following aneurysmal SAH.
Rupture of a cerebral aneurysm is a serious medical condition that may result in permanent disability or even death just related to the aneurysm rupture itself. Patients who undergo successful surgical treatment of their aneurysm will rarely experience problems related to that specific aneurysm in the future. However, blood that is on the surface of the brain from the initial aneurysm rupture is very irritating to other blood vessels that it comes in contact with. When these blood vessels become irritated, they spasm and become narrower. This narrowing restricts blood flow through the vessel, and if severe can result in a stroke that is caused by inadequate blood flow through the vessel. Depending on location and severity, this condition of vessel spasm (cerebral vasospasm) may result in permanent disability or death. Treatment to prevent cerebral vasospasm decreases the risk of stroke. This research is trying to see if a medication that is FDA approved for the treatment of lung disease and sexual dysfunction can be used to prevent and/or treat cerebral vasospasm.
Cerebral vasospasm following subarachnoid hemorrhage (SAH) is the most common cause of morbidity and mortality. Recent studies indicate that Rho-kinase play an important role in the occurrence of such cerebral vasospasm. Eicosapentaenoic acid (EPA) inhibits sphingosylphosphorylcholine (SPC)-induced Rho-kinase activation in vitro. So this study examines whether EPA prevents cerebral vasospasm occurrence after SAH in patients.
Extensive research has shown that the big event that leads to the initiation of vasospasm is the release of oxyhemoglobin (blood breakdown product).Depletion of NO synthase (19,20,21) was also noted after SAH.CSF is produced from choroid plexus in the ventricle. If the SAH is too dense, the blood in the subarachnoid space will not easy to be washed out.
The objective of this study is to determine whether acetaminophen (APAP), N-acetylcysteine (NAC), and APAP in combination with NAC will inhibit lipid peroxidation in aneurysmal subarachnoid hemorrhage (aSAH), utilizing F2-IsoPs as biomarkers for lipid peroxidation.