![]() As a result it cause abnormally rapid and irregular contractions of the heart with quivering/fluttering of the atria. However, in atrial fibrillation there is an abnormality in the way these impulses are triggered and conducted. This ensures that the atria first contract and thereafter the ventricles contract. Normally these impulses occur at regular intervals. ![]() Then the impulses travel through the atrioventricular (AV) node which causes the ventricles to contract. The impulses pass through the atria which causes the atria to contract. It is also known as the sinus node or the natural pacemaker of the heart. The heart’s contraction is triggered by electrical impuleses which are generated by the sinoatrial (SA) node in the heart wall. It passes the blood to the left ventricle which then pumps it out to the rest of the body to supply oxygen to all the cells. This oxygen-rich blood is then received by the left atrium. From here the right ventricle sends the blood to the lungs where it is oxygenated. The right atrium receives deoxygenated (low oxygen) which is passed to the right ventricle. Then ventricles contract to push out this blood to the rest of the body. The atria contract first while the ventricles relax to receive the blood. From here the ventricles pump the blood out of the heart. It receives blood which is then passed on to the ventricles. The atria (singular ~ atrium) are the two smaller chambers that lie in the upper part of the heart. It is more common in older adults and affects men more frequently than women. Atrial fibrillation will affect at least 1 in 4 American adults aged 40 years and older during their lifetime. However, it can sometimes occur when there is no problem with the heart. ![]() It can increase the risk of blood clot formation in the heart which may lead to a stroke or can even result in heart failure if persistent.Ītrial fibrillation is more likely to arise with heart disease or damage. Atrial fibrillation is the most common type of arrhythmia (irregular heartbeat). This quivering or fluttering of the heart can cause problems with blood circulation through the heart. This irregularity is known as an arrhythmia and one such type is atrial fibrillation.Ītrial fibrillation is where the upper chambers of the heart beat uncontrollably. The heartbeat becomes irregular and may also become abnormally rapid (above 100 beats per minute). However, there are conditions where this rhythm is affected. The heart beats throughout life and this beating may vary in rate but is usually rhythmical. ![]()
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