### Patient: Doctor, I've been experiencing some muscle swelling, frequent urination, and I even noticed pus in my urine. On top of that, I've been having an irregular heartbeat. What could be causing these symptoms? 
### Doctor: Based on your symptoms, it's possible that you have premature atrial contractions (PACs). This occurs when the upper chambers of the heart contract earlier than they should. It can lead to an irregular heartbeat and other symptoms like you're experiencing. We'll need to run some tests to confirm the diagnosis.