2. A vessel approaching a blind bend in a river can sound one prolonged blast on the ships' whistle to alert any other vessels to its presence, if another vessel is nearby then they will respond with one prolonged blast on the ships' whistle.
Atrial fibrillation, known as AF or Afib, is an irregular and often very fast heart rate. This may cause symptoms like heart palpitations, fatigue, and shortness of breath. Treating atrial fibrillation is important because it may cause a stroke and negatively impact your quality of life.
All of these can be symptoms of paroxysmal atrial fibrillation. Atrial fibrillation (AF or AFib) happens when the atria (upper chambers of the heart) lose their regular rhythm and beat chaotically. When this happens, blood isnât really streaming through the heart and body efficiently. This inefficient flow can cause blood to pool inside the atria, increasing the risk of blood clots.