Subarachnoid haemorrhage is a life-threatening medical emergency that requires immediate attention and specialised care. Understanding treatment options, from emergency surgery to long-term rehabilitation, can help patients and families navigate this challenging condition and improve the chances of recovery.

Treating a Brain Emergency: What Subarachnoid Haemorrhage Means for Patients

When blood spills into the space between the brain and the protective tissues covering it, the result is a subarachnoid haemorrhage. This serious medical event affects approximately 10 to 14 people out of every 100,000 each year in the United States, with similar rates seen across other countries.^[1] The condition is more common in people between 40 and 60 years of age, though it can happen to anyone.^[1]

Treatment for subarachnoid haemorrhage focuses on several important goals. First and foremost, doctors work to stop the bleeding and prevent it from happening again. They also aim to protect the brain from further damage, manage complications that can arise in the days and weeks following the initial bleed, and support the body’s other systems that may be affected. The treatment approach depends heavily on what caused the bleeding, how severe it is, and the patient’s overall health condition.^[2]

Medical professionals follow established guidelines from neurology and neurosurgery societies when treating this condition. At the same time, researchers continue to study new therapies and techniques through clinical trials. These studies aim to improve survival rates and help patients recover more fully. The treatment journey typically involves emergency stabilisation, surgery or other procedures to repair the damaged blood vessel, intensive monitoring in a specialised unit, and comprehensive rehabilitation to help patients regain lost abilities.^[3]

Standard Treatment Approaches for Subarachnoid Haemorrhage

The first priority when treating subarachnoid haemorrhage is stabilising the patient. This happens in the emergency department and continues in a specialised neurocritical care or intensive care unit. Medical teams focus on what’s called the ABCs: airway, breathing, and circulation. For patients who are unconscious or have reduced alertness, doctors may need to place a breathing tube to protect the airway and ensure proper oxygen levels. Blood pressure receives careful attention because it needs to be controlled to prevent further bleeding, yet maintained at a level that keeps blood flowing adequately to the brain.^[4]

Blood pressure management uses specific medications, typically short-acting drugs that can be adjusted quickly. Beta-blockers such as labetalol or esmolol are often the first choice because they work rapidly and can be fine-tuned to keep systolic blood pressure at or below 130 to 140 mmHg before the aneurysm is secured. These medications block certain signals in the body that would otherwise raise blood pressure. Doctors avoid using nitrate medications like nitroprusside because these can increase pressure inside the skull, which is dangerous in this situation.^[4]

Pain control is essential, as the headache from subarachnoid haemorrhage can be excruciating. Medications such as fentanyl are commonly used because they provide strong pain relief without overly sedating the patient. This is important because medical teams need to regularly check the patient’s neurological status – their level of consciousness, ability to move limbs, and response to commands. Over-sedation could mask important changes that signal worsening brain injury.^[4]

Once stabilised, the patient typically undergoes surgery or a procedure to repair the source of bleeding. In most cases, this means treating a ruptured aneurysm, which is a balloon-like bulge in a blood vessel wall. About 80 to 85 percent of spontaneous subarachnoid haemorrhages result from aneurysm rupture.^[2] Two main approaches exist for repairing aneurysms, and the choice depends on the aneurysm’s location, size, shape, and the patient’s overall condition.

Neurosurgical clipping is a traditional surgical approach. The surgeon makes an incision in the scalp and removes a small piece of skull bone to access the brain. Using a microscope for magnification, the surgeon places a tiny metal clip across the neck of the aneurysm, sealing it off from the blood vessel. This prevents blood from entering the aneurysm and stops further bleeding. The skull bone is then replaced. This procedure requires general anaesthesia and several days of hospital recovery.^[3]

Endovascular coiling is a less invasive alternative that has become increasingly common. A specialist called a neurointerventional radiologist performs this procedure. A thin, flexible tube called a catheter is inserted into an artery, usually in the groin or wrist. Using X-ray guidance, the doctor carefully threads this catheter through blood vessels up to the brain and into the aneurysm itself. Tiny platinum coils are then pushed through the catheter into the aneurysm. These coils fill the space, causing blood to clot inside the aneurysm and sealing it off. Sometimes a small mesh tube called a stent is also placed to help keep the coils in position.^[3]

Both surgical and endovascular approaches have benefits and risks. The medical team considers many factors when deciding which method to use. Studies comparing the two approaches suggest that endovascular coiling often results in better short-term outcomes, though both methods can successfully prevent rebleeding. The choice depends on individual circumstances, and some patients may need a combination of treatments.^[4]

Following the initial treatment, patients receive medications to prevent complications. Nimodipine, a calcium channel blocker, is given routinely to all patients with subarachnoid haemorrhage. This medication helps prevent a serious complication called vasospasm, where blood vessels in the brain narrow dangerously, reducing blood flow. Vasospasm typically occurs between three and fourteen days after the initial bleed. Nimodipine is usually given every four hours for twenty-one days. While it doesn’t always prevent vasospasm completely, studies show it improves outcomes and reduces the risk of delayed brain damage.^[4]

Anticonvulsant medications may be prescribed if a patient has seizures or is at high risk for them. However, these are not given routinely to everyone because they can potentially interfere with recovery in some cases. Medications to prevent nausea, soften stool (as straining can be dangerous), and treat other symptoms are also commonly used.^[3]

Some patients develop hydrocephalus, a build-up of cerebrospinal fluid inside the brain that increases pressure. This can happen in the acute phase or develop later. Treatment may involve placing a drain, called an external ventricular drain, which allows excess fluid to escape. Some patients need a permanent drainage system called a shunt, which redirects fluid from the brain to another part of the body where it can be absorbed.^[4]

Throughout the hospital stay, which typically lasts several weeks, patients are monitored intensively. Neurological checks happen frequently – sometimes every hour – to detect any changes in consciousness, strength, or other functions. Blood tests, imaging scans, and other diagnostic tests help the medical team track recovery and identify complications early. Transcranial Doppler ultrasound, a non-invasive test that measures blood flow velocity in brain arteries, is often used daily to watch for vasospasm.^[4]

Emerging Treatments Being Studied in Clinical Trials

While standard treatments have improved survival rates over recent decades, subarachnoid haemorrhage still carries significant mortality and leaves many survivors with lasting disabilities. Researchers are actively investigating new approaches to improve outcomes. These studies take place in specialised neuroscience centres in the United States, Europe, and other regions around the world.

One area of investigation involves finding better ways to prevent and treat vasospasm and delayed cerebral ischaemia – the reduction of blood flow to brain tissue that can occur days after the initial bleed. Current clinical trials are testing different medications and techniques. Some studies examine whether blood pressure can be carefully raised (induced hypertension) in patients showing signs of vasospasm, using medications called vasopressors to boost blood pressure and potentially improve blood flow to affected brain areas. This approach requires intensive monitoring to balance the benefits of increased brain blood flow against risks such as rebleeding or putting strain on other organs.^[4]

Researchers are also exploring medications that work through different mechanisms than nimodipine. Some experimental drugs target inflammatory processes in the brain following subarachnoid haemorrhage. When blood enters the subarachnoid space, it triggers inflammation that can damage brain tissue and blood vessels. Anti-inflammatory therapies aim to reduce this harmful response while preserving the body’s ability to heal.

Advanced monitoring techniques are being tested in clinical trials as well. These include devices that can be placed directly in the brain to measure oxygen levels, chemical changes, and pressure in real time. This information could help doctors detect problems earlier and adjust treatment more precisely. Some centres are studying whether specific patterns seen on advanced imaging scans, such as perfusion computed tomography, can predict which patients will develop vasospasm or need more aggressive treatment.^[4]

Endovascular treatments continue to evolve. Newer devices for treating aneurysms include flow-diverting stents and more sophisticated coiling systems. These are being tested in Phase II and Phase III clinical trials to determine whether they provide better outcomes than standard coiling, particularly for complex or difficult-to-treat aneurysms. Flow-diverting stents work by redirecting blood flow away from the aneurysm, gradually causing it to thrombose (clot off) and seal.

Some research focuses on neuroprotection – protecting brain cells from damage during and after the haemorrhage. Experimental therapies include medications that might shield neurons from injury caused by bleeding, inflammation, or reduced blood flow. These are typically tested in early-phase trials (Phase I and II) to establish safety profiles and gather preliminary information about potential benefits.

Studies are examining whether certain existing medications, approved for other conditions, might help subarachnoid haemorrhage patients. For example, researchers are investigating whether statins (cholesterol-lowering drugs) have protective effects on blood vessels in the brain following haemorrhage. Early studies have shown mixed results, and larger trials are needed to determine if these medications should become part of standard treatment.

Rehabilitation approaches are also being refined through clinical research. Trials are testing different timing and intensity levels for physical therapy, cognitive rehabilitation, and other interventions. The goal is to identify strategies that maximise recovery of function and quality of life. Some studies examine whether early mobilisation – getting patients out of bed and moving sooner – improves outcomes, or whether more cautious approaches are safer.

Patient eligibility for clinical trials varies depending on the specific study. Generally, trials have strict criteria regarding factors such as age, severity of the haemorrhage, presence of other medical conditions, and timing since the event. Patients interested in participating in clinical trials should discuss options with their medical team. Participation is always voluntary, and patients receive detailed information about potential risks and benefits before deciding whether to enrol.

Most common treatment methods

• Surgical repair of aneurysm
  • Neurosurgical clipping involves opening the skull and placing a metal clip across the aneurysm neck to stop blood flow into it
  • Endovascular coiling uses a catheter threaded through blood vessels to pack the aneurysm with platinum coils, causing it to clot and seal
  • The choice between clipping and coiling depends on aneurysm location, size, and patient factors
• Blood pressure management
  • Beta-blockers such as labetalol or esmolol are used to control blood pressure before aneurysm repair
  • Target systolic blood pressure is typically kept at or below 130-140 mmHg to reduce rebleeding risk
  • Short-acting, titratable medications are preferred for rapid adjustment
• Vasospasm prevention
  • Nimodipine, a calcium channel blocker, is given every four hours for twenty-one days to all patients
  • This medication helps prevent dangerous narrowing of brain blood vessels that typically occurs between days three and fourteen
  • Improves outcomes and reduces risk of delayed brain damage from reduced blood flow
• Hydrocephalus treatment
  • External ventricular drain placement allows excess cerebrospinal fluid to escape and reduces pressure inside the skull
  • Some patients require permanent shunt placement to continuously drain fluid
  • Regular monitoring helps detect this complication early
• Supportive care and monitoring
  • Pain management with medications like fentanyl that provide relief without excessive sedation
  • Frequent neurological assessments to detect changes in consciousness or function
  • Transcranial Doppler ultrasound to monitor blood flow and detect vasospasm
  • Medications to prevent seizures, nausea, and other complications

Recovery and Long-term Effects

Recovery from subarachnoid haemorrhage is highly individual, with no standard timeline that applies to everyone. Some patients recover fully over months or years, while others experience lasting changes that affect daily life. The location and extent of brain damage, along with complications during treatment, influence the recovery trajectory. Most patients show gradual improvement with appropriate rehabilitation and support.^[3]

Many survivors experience persistent fatigue that can be overwhelming, especially in the first months after discharge. Simple activities such as shopping, reading, or conversing with friends may become exhausting because the brain works hard to process information. This is a signal from the body to slow down and rest more frequently. Sleep patterns often change, with difficulty sleeping through the night and need for daytime naps.^[6]

Cognitive changes are common and can include problems with memory, concentration, and processing information. Survivors may remember distant events clearly but struggle to retain new information, like names of people they’ve just met. Breaking tasks into smaller steps and allowing time for rest between activities can help. Using memory aids such as notebooks, calendars, coloured sticky notes, and phone alarms provides practical support. Many people find these difficulties improve over time, though memory may never fully return to pre-haemorrhage levels.^[6]

Headaches following discharge are frequent but usually become less severe over time. These differ from the initial thunderclap headache and can often be managed with standard pain relievers like paracetamol. Fatigue is closely linked to headaches – they often worsen when tired. Some people describe unusual sensations in their head, such as tingling or a feeling like water trickling across the brain surface. While difficult to explain, these sensations are common, not dangerous, and typically fade gradually.^[6]

Emotional and psychological impacts can be profound. Depression, anxiety, tearfulness, anger, or irritability may occur without obvious triggers. These responses can be both physical – related to brain injury – and emotional reactions to the traumatic experience. Many patients worry about having another haemorrhage or feel anxious about returning to normal activities. Professional psychological support and counselling can be valuable. Some people find that connecting with others who have survived similar experiences provides comfort and practical coping strategies.^[6]

Vision problems affect some survivors, including blurred vision, blind spots, double vision, or sensitivity to light. If visual difficulties persist, referral to an eye specialist may be necessary. It’s advisable to wait two to three months after the haemorrhage before having eyes tested for new glasses or contact lenses, allowing vision to stabilise.^[6]

Physical rehabilitation often includes physiotherapy to address movement difficulties, occupational therapy to relearn daily living skills, and speech therapy if communication or swallowing are affected. The intensity and duration of rehabilitation vary based on individual needs. Regular follow-up appointments with the medical team help monitor recovery, manage complications, and adjust treatment plans.^[3]

Return to work, driving, exercise, and other activities requires careful discussion with healthcare providers. Timing depends on the severity of the haemorrhage, extent of recovery, and specific demands of each activity. Many people find they need to make adjustments, such as working reduced hours initially or choosing less physically demanding exercises. Building a daily routine with consistent sleep and wake times can support recovery.^[6]

Family members and caregivers also need support, as they often take on new responsibilities and cope with changes in their loved one’s abilities and personality. Support groups, counselling, and education about subarachnoid haemorrhage can help families navigate this challenging period. Open communication between patients, families, and healthcare teams is essential for successful long-term management.^[6]