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.
FIP is caused by a virus. Cats can be infected with feline coronavirus (FCoV). There are two types of this virus which cannot be distinguished from each other in laboratory tests. One is avirulent (does not cause disease) or only mildly virulent and is called feline enteric coronavirus (FECV).