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Atrial fibrillation

Afib

Atrial fibrillation is an abnormal rhythm of the heart. It can be an intermittent (paroxysmal) or chronic condition.
In atrial fibrillation the upper chambers of the heart (or atria) do not work correctly because of abnormal electrical activity. Blood is not forcefully moved out of these chambers and becomes ‘static’, which allows blood clots to form and can put patients at risk of stroke.
Atrial fibrillation often occurs in people who have underlying heart disease. Almost any heart disease can increase the risk of this abnormal rhythm, but the most common causes are:

  • Hypertensive heart disease due to chronic high blood pressure.
  • A heart attack (myocardial infarction, or MI)
  • Heart failure

Symptoms

Some people have no symptoms of atrial fibrillation while others experience marked shortness of breath.
Symptoms include:

  • Unpleasant palpitations or irregularity of the heart beat
  • Chest discomfort
  • A racing heart
  • Mild shortness of breath and fatigue that limit the ability to exercise

Severe symptoms include:

  • Difficulty breathing
  • Fainting, or near fainting, due to a reduction in blood flow to the brain

Risk of stroke is a serious complication associated with atrial fibrillation. A stroke can occur if a blood clot forms in the left atrium because of sluggish blood flow and a piece of the clot (called an embolus) breaks off. Without preventive treatment (eg, blood thinners), stroke occurs in approximately 1.3 percent of people with AF who are 50 to 59 years each year and increases gradually to 5 percent each year for people 80 to 89 years.

Taking an anticoagulant lowers the risk of stroke

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About Us

Paul & Angela

Paul, a specialist haematologist says, “I have a passion for improving anticoagulant management and I’m on anticoagulants myself. My wife, Angela, trained as a doctor, but has concentrated instead on raising our large family. We live in beautiful New Zealand and run INR Online, providing warfarin management software for health professionals.” More

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