Atrial fibrillation is a type of arrhythmia, which is the term for an irregular heart rhythm. Many prescription medications are available to help manage this condition. The drugs may have different effects, which can include controlling the heart rate, preventing blood clots, and normalizing the rhythm of the heart.
Also known as A-fib, this condition is a type of arrhythmia, meaning that a person has an irregular heart rhythm. The beating of the upper two chambers of the heart, known as the atria, is irregular. It occurs after
A-fib is the most common clinical arrhythmia. Although it can occur at any stage of life, the risk of developing A-fib
In this article, we discuss the different types of medications that can help manage atrial fibrillation.
Due to the irregular heartbeat that may occur with A-fib, blood can pool in the heart and increase the risk of blood clots. If these blood clots enter the bloodstream, they can lead to a stroke. As such, people may receive drugs known as blood thinners to prevent blood clot formation or to treat an existing blood clot. Examples of drugs that help prevent blood clots
Anticoagulants are a group of medications that reduce the body’s ability to form blood clots by interrupting the blood clotting process. The formation of a blood clot relies on substances called
Possible side effects of anticoagulants include:
- excessive bleeding
- changes in bowel movements
Examples of anticoagulants include:
However, a high number of platelets can result in unnecessary clotting, which can increase the risk of a stroke. As such, a doctor may only recommend antiplatelets for individuals with a high risk of A-fib or other cardiovascular events. A person should not start or stop aspirin without first consulting a doctor.
Possible side effects of antiplatelets include:
- bleeding more easily
- stomach pain
- indigestion or heartburn
These medications, which are known as anti-arrhythmic drugs, help control heart rate. Typically, they slow the heart rate by blocking irregular electrical signals in the atria, which prevents their transmission to the ventricles. Examples of heart rate-controlling medications
Beta-blockers, also known as beta-adrenergic blocking agents, are a group of drugs that block the action of certain hormones that can affect the heart rate. They can block the release of epinephrine and norepinephrine, which would otherwise cause a rapid heartbeat and heart palpitations.
Beta-blockers can also reduce the production of angiotensin II. In doing so, they help blood vessels relax, easing the passage of blood.
Generally, people are able to tolerate beta-blockers well. However, some individuals may still experience side effects,
Examples of beta-blockers include:
Calcium channel blockers
Calcium channel blockers (CCBs) can increase blood flow and oxygen to the heart. Calcium plays a vital role in enabling muscle contraction and allowing the heart to pump blood around the body. CCBs reduce the amount of calcium that can enter cardiac muscle cells and blood vessel walls, which helps lower blood pressure and slow a person’s heart rate.
Side effects from CCBs are rare, but they can
- slow heart rate
- low blood pressure
Digoxin is a drug that can
Potential side effects of digoxin include:
- blurry vision
- skin rashes
These types of drugs attempt to restore the heart rhythm to normal. Experts may also refer to this as pharmacological or
Sodium channel blockers
The heart features many different ion channels, including
Potential side effects of sodium channel blockers include:
- vision problems
- changes in bowel movements
Examples of sodium channel blockers include:
Potassium channel blockers
Potassium is an essential macromineral that
Possible side effects of potassium channel blockers include:
- abdominal pain
Examples of potassium channel blockers include:
There are three basic types of A-fib:
- Paroxysmal: This is more common in the early stages of the condition, wherein episodes occur intermittently but not frequently.
- Persistent: This develops when an irregular heartbeat lasts for longer than 7 days.
- Long standing persistent (formerly known as permanent): A doctor will describe A-fib as long standing persistent when it is not possible to bring the heart back to a regular rhythm.
Most people with A-fib will need to take medication to manage their symptoms and reduce their risk of stroke. For some people, medication alone is not enough to control A-fib. In these cases, a doctor may recommend more intensive treatment options, such as catheter ablation, surgical maze procedures, or electrical stimulation.
Doctors look at various factors before developing a treatment plan. These include:
- the person’s age
- the severity of their symptoms
- how often the symptoms occur
- their heart rate
- their risk of stroke
- any underlying heart disease or other health conditions
Many doctors use the
Several medications are available to treat or manage the various effects of A-fib. The type and severity of A-fib will dictate which medications are best. A doctor will monitor the person’s response to the drug over time, checking regularly for any adverse effects and any changes in symptoms.
As with any drug, some people may experience side effects when taking A-fib medications. These may include a risk of excessive bleeding, hypotension, and a slow heart rate. If medications do not resolve the irregular heart rhythms, a doctor may suggest surgical options to help treat the condition.