Sudden, severe headache like a lightning strike? Could it be RCVS? (Reversible Cerebral Vasoconstriction Syndrome)

Imagine if you were doing your normal work and suddenly, without any warning, you had the worst headache you've ever experienced. It was the most excruciating pain in your life. The pain would reach its peak within seconds. In medicine, we call this sudden, severe headache a "Thunderclap Headache." This is not just any headache. This is often a serious warning that our body is giving us. RCVS is one such condition that gives such a warning.

Simply put, what is RCVS?

The full name for RCVS is Reversible Cerebral Vasoconstriction Syndrome . The name may seem a bit long and complicated, but let's keep it simple.

• Reversible: means "can be reversed." This means that the condition is not permanent and can be cured with proper treatment .
• Cerebral: means "pertaining to the brain."
• Vasoconstriction: means "the narrowing or constriction of blood vessels."

Simply put, RCVS is a condition in which the blood vessels in the brain suddenly become tight, constricted, and blocked . However, this can be reversed with proper treatment.

Imagine a water pipe. What happens if we squeeze one part of the pipe? It stops the water from flowing, doesn't it? The same thing happens to the blood vessels in our brain. When these blood vessels suddenly tighten (we call this ``vasospasm''), the brain does not get the required amount of blood. This is why we get those severe headaches that feel like lightning strikes. This condition can also sometimes indicate symptoms such as migraines, strokes, or bleeding in the brain .

What are the symptoms of RCVS?

In RCVS, blood flow to the brain is disrupted, resulting in a variety of symptoms. The main symptom is a severe headache, but there are other symptoms as well.

In some cases, RCVS can cause bleeding between the brain and the skull. This is called `(Subarachnoid Hemorrhage - SAH)`. This is also a very serious medical emergency. In addition to the above symptoms, SAH may also show the following symptoms:

• Neck stiffness, muscle pain in the neck and shoulders.
• Changes in behavior and mood (getting angry for no reason).
• Numbness in a part of the body.

What are the factors that contribute to the development of RCVS?

Although the exact cause of RCVS has not yet been discovered, several risk factors have been identified that may contribute to the development of this condition.

Pregnancy and childbirth

The most common and most common risk factor for RCVS is pregnancy. The risk is highest during the first six weeks after giving birth (postpartum). Doctors believe that hormonal changes during pregnancy may play a role. RCVS can occur even in the absence of complications such as preeclampsia, which is a high blood pressure condition that occurs during pregnancy.

Use of certain medications and drugs

Some medications and drugs that affect our circulatory system increase the risk of RCVS.

Other health conditions

Certain medical conditions also increase the risk of developing RCVS.

• Migraine: People with migraines are more likely to develop RCVS.
• Increased blood calcium levels (Hypercalcemia): When calcium levels in the blood increase, the function of blood vessels can be disrupted.
• Hormonal issues: The hormone estrogen is suspected to be involved in this. This is why this disease is more common among women.
• Hereditary diseases: Diseases that cause tumors that produce excess adrenaline hormone, such as ``Pheochromocytoma``.

What are the possible complications of RCVS?

In the past, doctors thought that RCVS was a harmless, harmless condition, but new research has shown that this is not always the case.

About 30% of RCVS patients may be left with some minor permanent disability (for example, some muscle weakness, problems with balance when walking). About 8% may develop more serious, long-term problems.

In addition, more serious complications may develop within a few days of the first symptoms appearing.

• Ischemic Stroke: A stroke caused by a blockage in a blood vessel that supplies blood to the brain.
• Brain bleed: A condition similar to SAH.
• Epilepsy (`(Seizures)`).

How is RCVS diagnosed?

When you go to the Emergency Department (ETU), doctors follow several steps to diagnose this condition.

1. Physical and nervous system examination: In addition to asking about your symptoms, your nervous system function (e.g., speech, vision, body balance) will be tested.

2. Blood tests: Blood tests are done to look for things like blood clotting problems, infections, and imbalances in the body's salts.

3. Imaging Scans: These scans are the most important in diagnosing RCVS. They can "look" inside the brain and identify problem areas.

What types of scans are these performed?

• CT Scan (`(Computed Tomography - CT scan)`): A scan called `(CT angiogram)` can be used to see the condition of the blood vessels in the brain. CT scan is very important for quickly diagnosing a stroke, because every second counts when treating a stroke.
• MRI scan (Magnetic Resonance Imaging - MRI scan): A scan called Magnetic Resonance Angiogram - MRA can clearly show the constriction of blood vessels (vasospasm) and the resulting effects on the brain.
• Transcranial Doppler ultrasound: This measures the speed of blood flow through the brain and can give an idea of ​​whether blood vessels are blocked.

Often, after ruling out a stroke, an MRI/MRA scan is required to confirm RCVS.

How is RCVS treated?

As the name suggests ("Reversible"), this is a treatable condition . There are two main goals of treatment.

1. Eliminating the cause: If the cause of the RCVS condition can be clearly identified (e.g., a certain medication), the first step is to eliminate that cause.

2. Controlling blood vessel constriction: Medications are given to control the constriction of blood vessels (`(vasospasm)`).

The most commonly used type of medication for this is calcium channel blockers (`(Calcium Channel Blockers - CCBs)`) . These medications work by stopping calcium from entering the smooth muscle cells in the walls of blood vessels. The muscles then relax, the blood vessels widen again, and blood flow to the brain is restored.

In very rare cases, when the disease does not respond to medication, a procedure called ``endovascular'' may be used. In this case, a very thin tube (``catheter'') is passed through a blood vessel in the arm or leg to a blood vessel in the brain, and a balloon is inflated through it (``angioplasty'') to widen the blocked vessel or to administer medication directly.

What to expect if RCVS is formed?

If you have RCVS, the first thing you may experience is a severe, sudden headache. This is a medical emergency and requires immediate treatment. Once treatment begins, most people recover within a few days or weeks .

Most people (about 80% - 85%) recover completely without any long-term problems . That's the best thing about this disease. About 10% may have minor problems. However, there is a small risk of serious complications, such as the stroke we talked about earlier, so early diagnosis and treatment are very important.

What should we do to prevent RCVS from coming back?

If you have had RCVS, your doctor may advise you to make some lifestyle changes to prevent it from recurring.

• Stopping the medication that caused RCVS: If a medication caused the condition, discontinue it as directed by your doctor and avoid taking that medication in the future.
• Take the medications prescribed by the doctor regularly: Take the medications prescribed on time to prevent the symptoms from returning.
• Completely avoid unnecessary drug use: Stay away from stimulants, especially those that affect the circulatory system, such as marijuana.
• Control caffeine and energy drinks: It is wise to reduce the amount you drink or stop drinking them altogether.

Your doctor will ask you to come back to the clinic to monitor your condition. Be sure to attend those appointments.