What does the medical term AF- mean?

The medical term AF- means "atrial fibrillation". Atrial fibrillation is a heart arrhythmia characterized by rapid and irregular heartbeats that can cause symptoms such as palpitations, chest pain, shortness of breath, and dizziness. It is the most common type of arrhythmia, and it is more likely to occur in elderly individuals or those with other underlying heart conditions.