We've all heard of high blood pressure. But did you know that low blood pressure can be just as dangerous, and possibly even more dangerous? You've probably heard of someone who suddenly becomes seriously ill and is admitted to the Intensive Care Unit (ICU). At such times, that person's blood pressure may have dropped significantly. When this happens, the body's most important organs, such as the brain, heart, and kidneys, are deprived of the oxygen-rich blood they need. Today, we're going to talk about a special, very powerful type of medicine that doctors use to save lives in such life-threatening emergencies. This is what is called Vasopressors in medicine.
What are vasopressors simply?
Simply put, a vasopressor is a type of medication that doctors use to help people with very low blood pressure to bring it back to normal. These medications work by constricting, or narrowing, the blood vessels in our body.
Think of it this way. The blood that circulates throughout our bodies is like a system of water pipes. If these pipes (blood vessels) suddenly become large or loose, the pressure of the water (blood) flowing through them decreases. This is what we call a state of shock. At times like these, blood stops flowing to the body's vital organs. Without oxygen, those organs stop working, and that person's life can even be jeopardized.
Usually, when the pressure drops like this, the first thing to do is to give saline (IV fluids). But if the pressure doesn't return to normal even with saline, then the next thing doctors do is use a type of medicine called a vasopressor. These are medicines that are injected directly into a vein. They are usually given through a special tube that is placed in a large vein in the neck or chest, called a central venous catheter. Then the medicine quickly goes to the heart and spreads throughout the body.
How does this medicine work in the body?
Vasopressor medications do two main things when they enter the body.
1. Constrict blood vessels: This is the main thing. It narrows the blood vessels throughout the body. Just like squeezing a water pipe makes the water flow faster, when blood vessels narrow, the pressure of the blood inside them increases.
2. Increase heart contractions: Some vasopressors act on the heart, increasing the amount of blood it pumps with each beat. This means they temporarily increase the heart's pumping ability.
Both of these methods quickly restore low blood pressure and restore blood flow to vital organs such as the brain, heart, and kidneys .
What are the most commonly used types of vasopressors?
Vasopressors are used in intensive care units (ICUs) to treat low blood pressure due to various causes. The doctor chooses the most appropriate medication based on the patient's condition.
| Drug Name | Some Brand Names |
|---|---|
| Norepinephrine | Levophed® |
| Epinephrine | Adrenalin®, EpiPen® |
| Vasopressin | Pitressin®, Vasostrict® |
| Dopamine | Intropin® |
| Phenylephrine | Biorphen®, Vazculep® |
| Angiotensin-II | Giapreza® |
Do we use this kind of medicine in everyday life?
Yes. We use some medicines every day that work in the same way as this medicine, although not as powerful as this one.
- Nasal Decongestants: When you have a cold, your nose gets stuffy. Some nasal drops or lozenges that we use contain substances like `(Ephedrine)` and `(Pseudoephedrine).` These work by constricting the blood vessels inside the nose, reducing swelling, and making it easier to breathe.
- EpiPen®: The EpiPen®, which is used in cases of severe allergy, such as anaphylaxis caused by a bee or wasp sting, or eating certain foods, contains the same drug called Epinephrine.
- Some cold medicines: Some cold medicine packets may contain `(Phenylephrine)`. That too belongs to this vasopressor category.
Are Vasopressors and Inotropes the same thing?
Yes, these are two types of medicine. But doctors often use both of these types together. Let's understand the difference simply.
Imagine that our heart is a water motor, and our blood vessels are the pipes through which the water flows.
- Vasopressors: These medications work by constricting the blood vessels and increasing blood pressure.
- Inotropes: These medications increase the power of the water motor (heart) , causing it to pump more water at once.
So, if someone's blood pressure is low and their heart is weak, doctors give both of these medications together, increasing the pressure by constricting the tube on one side, and increasing the power of the motor on the other side to pump blood to the body as efficiently as possible.
In what situations are vasopressors needed?
Vasopressors are a type of life-saving medication given to a patient who is between life and death. These are not medications given for a common illness. Here are some of the main situations in which they are needed.
| Condition | A simple explanation |
|---|---|
| Shock | Blood pressure can drop dangerously low due to conditions such as severe infection (sepsis), heavy bleeding, and heart attack. |
| Heart Attack | Due to blockage of a blood vessel supplying blood to the heart, the heart's function is impaired and blood pressure decreases. |
| Heart Failure | The heart is unable to pump enough blood to the body. |
| Spinal Anesthesia | During some surgeries, the anesthetic drugs given to the spine can cause a sudden drop in blood pressure. |
| Severe drug reaction | Severe allergic reactions to certain medications can cause low blood pressure. |
| Accidents and surgeries | Low blood pressure due to massive bleeding. |
Are there any side effects to this medicine?
Yes. Vasopressors are very powerful drugs . Therefore, they can cause side effects. For this reason, these drugs are given in an intensive care unit (ICU), while constantly monitoring the patient's condition . Doctors and nursing staff constantly monitor the patient's heart rate, blood pressure, and oxygen levels.
Some possible side effects are:
- Anxiety and restlessness
- Headache
- Chest pain
- Difficulty breathing
- Abnormally slow heart rate (Bradycardia)
- Abnormally increased heart rate (Tachycardia)
- Irregular heartbeat (Arrhythmia)
- Blood pressure that is higher than necessary. (This can even lead to a serious condition like bleeding in the brain)
- Excessive constriction of blood vessels causes decreased blood flow to the fingertips and toes, causing those areas to turn black.
Although these side effects are dangerous, it is important to remember that these medications are given in even more dangerous, life-threatening situations. Doctors always try to weigh the pros and cons and do what is best for the patient.
How long does it take to recover?
It's difficult to give a single answer to this question, because the time it takes for you to recover is determined not by the vasopressor medication you were given, but by the underlying medical condition that led to the medication being given .
For example, someone who goes into septic shock from a severe infection may need to stay in the hospital for weeks, even months, to recover. However, someone who is given this medicine for a short time during surgery to reduce the pressure caused by anesthesia can recover more quickly.
The important thing is that the fact that you had to be given such a powerful medicine means that you have recovered from a very serious illness. Therefore, you need to give your body the time it needs to recover.
After you get home from the hospital, don't rush back to your normal routine. Take the medication your doctor has prescribed on time. Also, be sure to keep your follow-up appointments. If you feel unwell again, for example, if you have difficulty breathing, chest pain, or feel unwell, call your doctor immediately or go to the nearest hospital's Emergency Department (ETU).
Take-Home Message
- Vasopressors are a very powerful class of drugs used to save lives in emergencies, such as shock, when blood pressure drops dangerously low.
- Their main function is to constrict blood vessels, increase blood pressure, and ensure blood flow to vital organs.
- Due to their potency and possible side effects, these drugs are only given in intensive care units (ICUs), under the constant supervision of doctors and nursing staff.
- If you or someone close to you has been given this treatment, it means they are recovering from a very serious illness. It is essential to follow medical advice very carefully after leaving the hospital.
💬 අදහස් (0)
තවමත් කිසිදු අදහසක් පළ කර නොමැත. ඔබේ අදහස පළමු වරට මෙහි එක් කරන්න.
ඔබේ අදහස එක් කරන්න