Subarachnoid Hemorrhage


What is a subarachnoid hemorrhage?

The subarachnoid space is the space between the brain and surrounding tissues where the cerebrospinal fluid circulates. Subarachnoid hemorrhage is bleeding from a blood vessel in the brain into the subarachnoid space, the space between the brain and its surrounding membrane. The subarachnoid hemorrhage is considered a case of a hemorrhagic stroke.

The primary symptom is a sudden and severe headache. Other symptoms associated with this are nausea, vomiting, and a brief loss of consciousness. It can occur quickly and most often is the result of head trauma. Call 911 as soon as you notice the symptoms of subarachnoid hemorrhage.

A small but significant percentage of those affected by SAH die even before they reach the hospital. As many as 25% of the patients die in 24 hours because of subarachnoid hemorrhage, with or without medical care.

Symptoms of a subarachnoid hemorrhage

The primary symptom of a subarachnoid hemorrhage is a severe headache. Some people have recounted it as the worst headache they have ever had. The intensity of the pain is more at the base of the skull. Some other symptoms that have been noticed are:

  • Numbness
  • Irritability
  • Confusion
  • Nausea
  • Vomiting
  • Neck and shoulder pain
  • Decreased vision
  • Seizures
  • Double Vision
  • Rapid loss of alertness

The onset of the medical condition is very quick and it could lead to loss of consciousness. Therefore, it is important to seek medical attention as soon as you experience any of the above symptoms and you have a severe headache.

Causes of subarachnoid hemorrhage

Berry aneurysms

Subarachnoid hemorrhage can result from brain traumas or spontaneously. Spontaneous cases of subarachnoid hemorrhage are generally related to aneurysms. These are abnormalities within the brain’s arteries. Sometimes they are referred to as berry aneurysms because they cause clusters of sac-like pouches to form on the arteries in the brain. These clusters often resemble berries. Hence the name berry aneurysm.

When an aneurysm erupts, it bleeds and then forms a clot. This condition is responsible for most cases of subarachnoid hemorrhage. Aneurysmal hemorrhage can happen at any age, but it more common between 40 and 65. Brain aneurysms are more common in smokers, women, and those with high blood pressure. In some cases, trauma to the brain during an injury can cause aneurysms and this could result in subarachnoid hemorrhage.

Other causes of subarachnoid hemorrhage include:

  • Bleeding disorders
  • Bleeding from an arteriovenous malformation (AVM) or a tangle of blood vessels in your brain
  • Use of blood thinners

Risk factors for subarachnoid hemorrhage

We can better understand the risk for subarachnoid hemorrhage by understanding what increases the risk for an aneurysm. Some people are born with aneurysms. Also, subarachnoid hemorrhage can happen at any age. The following can increase the risk of an aneurysm:

  • According to the Internet Stroke Center, aneurysms are more common in women than men. The difference in the incidence of subarachnoid hemorrhage based on gender starts at the age of 55. The gap widens thereafter and reaches as high as 1.24 times in women as compared to men.
  • In a study presented in a stroke conference at New Orleans, it was concluded that smoking could lead to multiple aneurysms in the brain. It was also concluded that it increases the chances of an aneurysm rupturing as well.
  • Hypertension is also believed to increase the risk of a subarachnoid hemorrhage. According to a study conducted from 1994 to 1998, patients with hypertension had a nearly seven-fold higher risk of aneurysmal subarachnoid hemorrhage.
  • Alcohol, which has a detrimental effect on blood pressure, might increase the risk of subarachnoid hemorrhage.
  • The use of drugs, particularly cocaine and methamphetamine, increase significantly the risk of not only developing an aneurysm but also subarachnoid hemorrhage.
  • The risk of AVM rupture is higher during pregnancy.

One in 50 people in the United States have unruptured aneurysms. If you have a history of brain aneurysms, consult a doctor. This helps to take care of them before they rupture and lead to subarachnoid hemorrhage.

Diagnosis of subarachnoid hemorrhage

A physical exam and the presence of a severe headache help to conclude that subarachnoid hemorrhage is present. The physical exam in cases of subarachnoid hemorrhage usually reveals a stiff neck and a loss of vision. If the doctor feels further tests are needed to confirm subarachnoid hemorrhage, then he might conduct imaging tests.

Physical Exam

Physical examination findings may be normal or may include the following:

  • Mild to moderate BP elevation
  • Papilledema (loss of vision)
  • Tachycardia (elevated heart beat rate)
  • Temperature elevation
  • Retinal hemorrhage
  • Neurologic abnormalities

Imaging Tests

Imaging tests are done to help with the diagnosis of subarachnoid hemorrhage. Some of them are:

  • CT Scan: A dye is injected into the blood to view blood vessels in greater detail. This helps to identify any bleeding in your brain
  • MRI scan: A high contrast dye is injected into the blood, which helps in the imaging of the blood vessels. It also provides a detailed picture of the blood flow.
  • Cerebral Angiography: It involves the threading of a catheter from an artery in your leg up to the brain. A dye is then injected into the blood vessels of your brain to reveal any bleeding in the brain. Cerebral angiography is generally the last of the three imaging tests that are performed. It is done when the cause of the hemorrhage is not clear or if the previous two tests are negative for subarachnoid hemorrhage.
  • Transcranial ultrasound: Ultrasound is used to generate a detailed image of the brain and its blood vessels.

Lumbar Puncture

A good percentage (22%) of the cases of subarachnoid hemorrhage does not show up in initial image testing. The doctor then might go for a Lumbar puncture. In lumbar puncture, the cerebrospinal fluid is drawn from the back and it is examined. If there is any blood present in the cerebrospinal fluid, it points to a case of subarachnoid hemorrhage.

The lumbar puncture test could be positive for subarachnoid hemorrhage. In such a case, the doctor might order a repeat of the imaging tests to confirm that the condition exists. Subarachnoid hemorrhage is often misdiagnosed because 73% of the people do not get scans.

Treatment of subarachnoid hemorrhage

Rapid treatment is a necessary course of action in any case of subarachnoid hemorrhage. This will help to reduce the risk of mortality or further brain damage.

There is continuous bleeding and build up of pressure in the subarachnoid space. This may require draining out of the cerebrospinal fluid and the administering of other medications to reduce the bleeding and the pressure. This is the first course of action. Second, the cause of the subarachnoid hemorrhage needs to be identified. The aneurysm needs to be closed or clipped by surgery.

If your aneurysm needs to be clipped, generally a craniotomy is done. The skull is opened to reveal the affected portion and then the aneurysm is clipped surgically. However, a minimally invasive procedure called endovascular coiling also may be used. In endovascular coiling, a catheter is inserted into the groin until it reaches the aneurysm. Platinum coils are then released. These coils reach the aneurysm and cause embolization or clotting of the aneurysm.

The choice made between clipping or coiling is based on the location of the lesion and the availability and experience of hospital staff.

If subarachnoid hemorrhage induces a coma, then the patient will be on life support with ventilation, the air passageways will be kept open, and the cerebrospinal fluid will be drained regularly to prevent a build-up of pressure.

If you do not become unconscious or enter into a coma, you will still be given instructions to follow that will help prevent post-treatment coma. You may be advised rest and asked not to strain your body. Straining your body can increase a build-up of pressure in your brain and could lead to a worsening of the condition.

Because of the pulmonary complications that can develop later, the patients must go in for a baseline chest radiograph. This will serve as a reference point to evaluate pulmonary complications that may develop later. An ECG of the patient is also taken for evaluation in case of later cardiac complications.

Your doctor may prescribe medications to:

  • Regulate blood pressure with medication through an IV
  • Reduce the severity of headaches with painkillers and antianxiety medications
  • Prevent artery spasms with nimodipine

Complications after subarachnoid hemorrhage treatment

Unfortunately, treatment for subarachnoid hemorrhage does not cure the condition always. In fact, in many cases repeated bleeding occurs. Repeated bleeding happens when an aneurysm that has healed ruptures again. This could lead to coma or death.

Some people have also reported having seizures, strokes, and cardiac and pulmonary complications post treatment.

Preventing a subarachnoid hemorrhage

The only possible way to prevent a subarachnoid hemorrhage is to stop the problem where it starts. Identify the problem spots in your brain and if you have a history of brain aneurysms, keep the doctor informed.

Final Words

Subarachnoid hemorrhage is a medical condition where the affected patients take longer to recover. The chances of a coma or even death post-treatment are quite high if you are older or in poor health. The earlier you seek medical care, the better are your chances of surviving this condition. With recent advancements, the mortality rate of subarachnoid hemorrhage has decreased in the past three decades. It remains a burning problem, with 10–15% of the patients dying before they even reach the hospital. Mortality rates are still high even for those who receive medical attention.

https://www.webmd.com/smoking-cessation/news/20000216/smoking-linked-deadly-brain-aneurysms#1

https://www.webmd.com/heart-disease/atrial-fibrillation/what-are-the-types-of-tachycardia#1

https://www.webmd.com/brain/brain-hemorrhage-bleeding-causes-symptoms-treatments#2

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2820121/

https://www.ncbi.nlm.nih.gov/pubmed/12212365

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2095631/

https://www.mayoclinic.org/diseases-conditions/subarachnoid-hemorrhage/diagnosis-treatment/drc-20361014

https://emedicine.medscape.com/article/1164341-overview

Facts

  • The annual incidence of aneurysmal subarachnoid hemorrhage in the US is 6–16 cases per 100,000 persons, with approximately 30,000 episodes occurring annually.

Facts

  • The incidence of subarachnoid hemorrhage, unlike other kinds of stroke, has not reduced with time.

Facts

  • Of the nontraumatic subarachnoid hemorrhages, around 80% are caused by a ruptured berry aneurysm.
  • This is a rare medical condition, which affects only 0.01 to 0.08% of the people who are admitted into the ER.

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Dos and Don'ts

Dos
  • Consult a doctor the moment you have a severe headache and any of the other secondary symptoms.
  • Report the previous history of brain aneurysms (if any).
Don'ts
  • Indulge in recreational drug
  • Consume alcohol
  • Smoke

 

 

 

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Proven health benefits and nutrition of macadamia nuts Know all about scientific, amazing health benefits of macadamia nuts, its nutrition, recipes, how to consume, price and…
macadamia nuts in food
Proven health benefits and nutrition of macadamia nuts Know all about scientific, amazing health benefits of macadamia nuts, its nutrition, recipes, how to consume, price and…
hidden causes obesity
8 hidden causes of obesity you probably didn’t know! Did you know that around 2 billion people worldwide are either overweight or obese? Are you too a…
about mediterranean diet
Why you should be adopting a Mediterranean style of diet today Ever wondered why the Mediterranean diet is so healthy? One simple solution to lowering risk of several deadliest…
eating disorder anorexia
Eating Disorders: Lifestyle choice or a psychological condition? Is eating disorder just a harmless bad habit? Or does it represent grim psychological disorders? Do you want…
Jack in the box fast food
Jack In the Box : The perils of surging fast food culture in the USA Jack in the Box - How a culture of fast-food can clog your arteries, weaken your heart, fatten…
Pumpkin Seeds: Why pumpkins are more than just for pies! Pumpkins have been long associated with Halloween carvings and delicious pies. But did you know that pumpkin seeds…
kefir bottle
Kefir: Top reasons why this probiotic drink should be consumed by you Yet another remarkable fermented food, kefir is a much healthier version of yogurt. These chewy white grains can…
Carb Cycling: Weighing the pros vs the cons of this diet routine Completely discarding carbs from your life will do you more harm than good. Read more about carb cycling,…
Experts reveal the safest ways to perform an enema at home The idea of pushing some up your rectal area might make you queasy but an enema could actually…
reflexology massage
Top reasons why you should go for a reflexology massage today Reflexology involves the application of pressure to your feet and hands to encourage self-healing. Could this be beneficial…
Balneotherapy jacuzzi
5 things you didn’t know about balneotherapy and how you can do it at home Sauna baths have been popular since a long time. But how much more beneficial can balneotherapy be as…
Hysteroscopy_procedure
Hysteroscopy Hysteroscopy is a minimally invasive tool to help specialists view the uterus to diagnose and even treat several…
anoscopy
Anoscopy Anoscopy is an invasive diagnostic procedure where a small device known as anoscope will be inserted in the…
How to correctly perform nasal irrigation using a Neti Pot? Neti pot has been a part of Ayurveda since centuries. This ancient tool is extremely effective in treating…
Oxidative Stress: Understanding the most lethal phenomenon happening in your body right now Free radicals cause damage to the body, which is known as oxidation.  The amount of oxidation caused by…
11 unbelievable health benefits of thyme you didn’t know! Thyme is a herb that has been used in alternative medicine.It is a well known seasoning in the…
Barium-enema
Barium Enema Barium enema is also known as colon x-ray. Here, the patient is asked to consume small amount of…
GGt test
GGT – Gamma-Glutamyl Transferase Test GGT or gammaglutamyl transferase test is a liver function test that is used to detect the extent of…
Tissue Transglutaminase Antibody (tTG) Test Transglutaminase is an enzyme present in our body and is involved in protein metabolism. A tTg test is…
thyroid_scan
Thyroid Scan Thyroid scan is a diagnostic procedure that aims to view the thyroid gland and detect any growths or…
lp-pla2
LP-PLA2 Test The LP-PLA2 test is a test which is carried out to assess the levels of Lipoprotein-Associated Phospholipase A2…
immunoglobulin M
Immunoglobulin M Test Immunoglobulin M is the largest and the first produced antibody which helps in the prevention or fighting of…
carrageenan seaweed
Carrageenan: How a simple seaweed extract could better your gut health & immunity Eat more ice cream to prevent cold and flu? –With carrageenan you get one simple seaweed extract that…
Salt dangers
Sodium chloride: The wonders and dangers of the simple table salt Sodium chloride is a salt containing sodium and chlorine ions at a 1:1 ratio. It is edible and…
The complete “what to eat” guide for gluten intolerance Does eating breads and pastas often makes you nauseous? Gluten intolerance is a common reason why you might…
The right way to prepare Alfalfa sprouts at home Alfalfa or lusan ghas is not just a nutritious animal fodder. This flavonoid-rich herb has some amazing health…
Find all the instant ways to get rid of blackheads Blackheads - Not only are they aesthetically unappealing but if left untreated these can cause bacterial overgrowth on…
Pescatarian Diet 101: What are the inherent health advantages of this diet? People opt to become a pescatarian in order to enrich their bodies with the essential health benefits that…
Appendix pain: Recent findings on this not-so vestigial organ The exact function of the appendix is still not clear. Some consider it as an organ that once…
How to scrub away stress and fatigue with an Epsom salt bath? Epsom salt is a popular home remedy for many skin ailments. Though there is a lack of scientific…
SIBO Diet: The important dos and don’ts of this gut-healing diet A SIBO diet is a diet that works by eliminating certain sugars from your diet and adding fibers…
Coffee Enema: Turn your favorite morning beverage into a powerful colon cleanser The wonders of coffee are not just limited to waking you up every morning. You can now use…
sleep deprivation
Don’t let your sleep deficit grow into memory loss or heart attack Why is sleep important for us? How could sleep deprivation harm you? We bet you didn't know about…
L-theanine attention
L-Theanine: Better sleep, higher focus, and many other benefits Did you know that L-theanine found in green tea can make you sleep better and be focused at…
improve digestion weight loss
Power up your gut: 8 proven steps on how to improve your digestion Did you know you have a colony of bacteria in your gut that help you in digesting food?…
bananas exercise
10 health reasons why you should go “bananas” over bananas! Bananas:The world's most popular fruit comes with a host of unbelievable health benefits. Find out how you can…
Oxalates: How healthy greens can sometimes be bad news for your kidneys Oxalates are compounds present in a majority of healthy foods. However, at times an overconsumption of these could…
Inversion Therapy: The anti-gravity way of healing chronic back pain Inversion therapy involves suspending a person upside dow using different types of equipment. This works by taking the…
Bubble Tea: Bubbling with nutrition or a hidden sugar mine? The tapioca pearls present in the tea looks like bubbles and hence the name bubble tea became popular.…
vdrl test syphilis
VDRL Test The VDRL test is a blood test that is used to diagnose sexually transmitted or venereal diseases, primarily…
complement c4 test
Anemia Profile Anemia Profile test (Basic) is a blood screening test that measures the levels of important components of the…
shoudler exercises
Keep your shoulders pain-free with these shoulder exercises Shoulder exercises are important in order to prevent chronic back and neck pain. Learn more about how you…
sugar toxic health
Sugar: 7 new shocking truths revealed about the sweet poison Can drinking soda bring you closer to death? Is sugar slowly poisoning you and your family? You would…