What are heart murmurs in children? Heart murmurs are extra or abnormal sounds made by turbulent blood flowing through the heart. Murmurs are graded on a scale of 1 to 6, based on how loud they are.
Chest pain, shortness of breath, and discomfort in one or both arms are some well-known heart attack symptoms. However, sudden nausea, fatigue, or dizziness can also be signs, especially in women.