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Atrial flutter causes definition1/18/2024 ![]() ![]() persistent atrial fibrillation – each episode lasts for longer than 7 days (or less when it's treated).paroxysmal atrial fibrillation – episodes come and go, and usually stop within 48 hours without any treatment.It may be triggered by certain situations, such as drinking too much alcohol or smoking.Ītrial fibrillation can be defined in various ways, depending on the degree to which it affects you. The cause is not fully understood, but it tends to affect certain groups of people, such as older people and people living with long-term (chronic) conditions such as heart disease, high blood pressure or obesity. These impulses override the heart's natural pacemaker, which can no longer control the rhythm of the heart. This causes you to have a highly irregular pulse rate. In atrial fibrillation, the heart's upper chambers (atria) contract randomly and sometimes so fast that the heart muscle cannot relax properly between contractions. This reduces the heart's efficiency and performance.Ītrial fibrillation happens when abnormal electrical impulses suddenly start firing in the atria. This process is repeated every time the heart beats. They then relax so the heart can fill with blood again. When the heart beats normally, its muscular walls tighten and squeeze (contract) to force blood out and around the body. Call 999 immediately as you need immediate treatment in hospital. also started with shortness of breath, sweating and feeling or being sick.spreads to your arms, back, neck or jaw. ![]() It's important to get medical advice to make sure it's nothing serious.
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