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Atrial fibrillation, also known as AFib or AF, is a common heart condition that causes an irregular heartbeat. It is a type of arrhythmia, characterised by a fast and irregular heartbeat, typically originating in the upper chambers of the heart. In AFib, electrical signals that control the heart's pumping action become disrupted, causing the atria to contract irregularly and out of sync with the ventricles. This disruption can lead to blood pooling in the atria, increasing the risk of blood clots and strokes. AFib is often diagnosed using an electrocardiogram (ECG or EKG) and can be treated with medication or procedures such as cardioversion (electrical shock) and catheter ablation. Factors such as age, genetics, lifestyle choices, and medical history can influence the development of AFib.
| Characteristics | Values |
|---|---|
| Common name | Atrial fibrillation |
| Abbreviation | AFib, AF, A-fib |
| Description | A quivery, fluttery heartbeat |
| Cause | Unusual electrical signals in the upper chambers of the heart |
| Heartbeat speed | More than 400 beats per minute |
| Heartbeat rhythm | Irregular |
| Risk factors | Age, family history, genetics, lifestyle, heart disease, race, surgical history |
| Diagnosis | Electrocardiogram (ECG or EKG) |
| Treatment | Antiarrhythmic medication, cardioversion, catheter ablation, maze procedure, pacemaker |
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What You'll Learn
- Atrial fibrillation (AFib) is a type of arrhythmia, or abnormal heartbeat
- It is caused by issues with the heart's electrical signalling, leading to a fast and irregular heartbeat
- This can cause blood to pool in the heart, increasing the risk of blood clots and stroke
- AFib can be diagnosed through an electrocardiogram (ECG or EKG) and other tests
- Treatment options include medication, electrical cardioversion, catheter ablation, and surgery
Atrial fibrillation (AFib) is a type of arrhythmia, or abnormal heartbeat
Atrial fibrillation, also known as AFib or AF, is a type of arrhythmia, or abnormal heartbeat. It is a common heart condition where the heart beats irregularly and more often than normal, usually over 400 beats per minute. This is caused by unusual electrical signals in the upper chambers of the heart, which interrupt the typical process and cause the upper chambers to contract irregularly. As a result, the upper and lower chambers are unable to work together effectively to pump blood, leading to blood pooling in the atria and an increased risk of blood clots and strokes.
AFib is characterised by a quivery, fluttery heartbeat, and can lead to serious complications such as heart failure, blood clots, and stroke. It is typically diagnosed through a physical exam, including a check of the heart rate and rhythm, and confirmed with an electrocardiogram (ECG or EKG) that measures electrical currents in the body and the timing of electrical signals in the heart.
The risk factors for AFib include age, family history, genetics, lifestyle choices such as alcohol consumption and smoking, race, and surgical history. It is more prevalent in older individuals, especially those over 65, and those with a family history of AFib or heart disease. Certain lifestyle choices, such as excessive alcohol consumption, illegal drug use, and smoking, can also increase the risk of developing AFib.
Treatment options for AFib include antiarrhythmic medication or medical procedures such as cardioversion (electrical shock) to restore a normal heart rhythm. Catheter ablation, which uses radiofrequency waves, extreme heat, or cold to destroy the tissue causing AFib, can also be employed. In some cases, surgical procedures such as the maze procedure, which creates a maze of scar tissue to block abnormal electrical signals, may be recommended.
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It is caused by issues with the heart's electrical signalling, leading to a fast and irregular heartbeat
Atrial fibrillation, also known as AFib or AF, is a common heart condition that causes an irregular and often extremely fast heartbeat. It is a type of arrhythmia, or abnormal heartbeat. In a healthy heart, the electrical signals that make the heart pump start in the sinoatrial node, an area in the upper right chamber of the heart called the right atrium. These electrical signals cause the atria to contract, pumping blood to the lower chambers, or ventricles. The electrical signal then travels down the heart, signalling the ventricles to contract and pump blood to the lungs and the rest of the body.
AFib is caused by issues with the heart's electrical signalling, leading to a fast and irregular heartbeat. In AFib, electrical impulses fire from multiple sites in both atria, causing the atria to contract irregularly and extremely quickly (often over 400 times per minute). This interrupts the typical process, causing the upper and lower chambers to fall out of sync and become unable to work together to effectively pump blood. As a result, blood can pool in the atria, increasing the risk of blood clots and strokes.
There are several factors that can lead to changes in the heart's electrical signalling and cause AFib. These include differences in the structure of the heart, early or frequent heartbeats, typical heart rate adjustments, patches of heart tissue that conduct the signal quickly or slowly, and repeated stimulation of specific areas of the heart. Age, family history, genetics, lifestyle, race, and surgical history can also increase the risk of developing AFib. Certain lifestyle choices, such as excessive alcohol consumption, illegal drug use, and smoking, are associated with a higher risk of AFib.
AFib can be diagnosed through a physical exam, including a check of the heart rate and rhythm, and an electrocardiogram (ECG or EKG) is used as the definitive test. Treatment options include antiarrhythmic medication or medical procedures such as cardioversion (electrical shock) to restore a normal heart rhythm.
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This can cause blood to pool in the heart, increasing the risk of blood clots and stroke
Atrial fibrillation, also known as AFib or AF, is a common heart condition that causes irregular heartbeats. It is a type of arrhythmia, or abnormal heartbeat. In a healthy heart, the electrical signals that make the heart pump start in the sinoatrial node, a special area of the upper right chamber of the heart called the right atrium. These electrical signals cause the right and left atria to contract, pumping blood to the lower heart chambers, or ventricles. The electrical signal then travels further down the heart, signalling the ventricles to contract.
In atrial fibrillation, unusual electrical signals in the upper chambers interrupt this typical process. The unusual signals cause the atria to contract irregularly and much faster than normal (over 400 beats per minute). The atria then get out of sync with the ventricles, which try to keep up with the rapid contractions. As a result, blood pools in the atria instead of moving into the ventricles and out to the rest of the body.
This pooling of blood increases the risk of blood clots in the heart. Blood clots can travel from the heart into the bloodstream and, if they reach the brain, can cause a stroke. Atrial fibrillation can also lead to other heart-related complications, such as heart failure.
The risk of atrial fibrillation increases with age, especially over 65. It can also be influenced by family history, genetics, lifestyle choices, race, and surgical history. Certain factors, such as aging, heart disease, infection, or genetics, can affect heart tissue and disrupt the normal rhythm of heart contractions.
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AFib can be diagnosed through an electrocardiogram (ECG or EKG) and other tests
Atrial fibrillation (AFib) is a type of arrhythmia or abnormal heartbeat. It is caused by extremely fast and irregular beats from the upper chambers of the heart (often more than 400 beats per minute). In a healthy heart, the electrical signals that make the heart pump start in the sinoatrial node, a special area of the upper right chamber of the heart called the right atrium. The signal makes both the right atrium and the left atrium contract, which pumps blood to the lower chambers, or ventricles.
Because AFib can come and go, a single ECG may not detect a problem. A doctor may recommend a special ECG monitor to record the patient's heart rhythm over an extended time. If a patient wears a smartwatch or other devices that monitor the heart and alert the wearer to an abnormal rhythm, this information can also help with diagnosis.
In addition to an EKG, doctors will perform a physical exam, including a check of the patient's heart rate and rhythm. If AFib is diagnosed, there are several treatment options. For people who are in AFib all the time, cardioversion (electrical shock) can restore a normal rhythm. Medications or catheter ablation can then help maintain the rhythm.
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Treatment options include medication, electrical cardioversion, catheter ablation, and surgery
Treatment Options for Fibrillation of the Heart
Medication
Medication is often the first line of treatment for fibrillation of the heart. For atrial fibrillation (AFib), medications can help the heart beat normally and may be the best option for treatment. However, if medication is ineffective, other treatment options may be considered, such as catheter ablation.
Electrical Cardioversion
Electrical cardioversion is a procedure that uses a defibrillator to deliver a shock to the heart through handheld paddles or electrode patches on the chest and back. This shock interrupts the abnormal electrical rhythm and restores a normal heart rhythm. Cardioversion can be life-saving in cases of ventricular arrhythmia that could lead to sudden cardiac arrest.
Catheter Ablation
Catheter ablation, also known as cardiac ablation, is a minimally invasive treatment for abnormal heart rhythms. During this procedure, a cardiologist inserts a catheter (a thin, flexible tube) through a blood vessel to the heart. They then use energy in the form of heat, cold, or short bursts to create scars in the areas where the arrhythmia originates. These scars help block abnormal electrical impulses, preventing abnormal heart rhythms. Catheter ablation is often considered when medication has been ineffective in treating the condition.
Surgery
In some cases, surgery may be necessary to treat fibrillation of the heart. Surgical procedures include the implantation of devices such as pacemakers, which are small electrical devices placed under the skin near the collarbone. Wires from the pacemaker connect to the heart, sending electrical signals to help regulate the heart rhythm and speed. Another surgical option is the maze heart surgery, a complex procedure that creates scar tissue in the heart to block the signals that cause AFib, helping to restore a normal heartbeat.
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