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.
Afib Symptoms In Women. Afib Symptoms In Women aren't that unusual: a racing heart, dizziness, or being extremely tired. Woman - being tougher than us men often try to live with their symptoms before getting help and finding out that atrial fibrillation was the cause of their problems. Don't wait - see your doctor!