Depending on how the heart’s electrical activity appears on an EKG, a doctor may diagnose coarse or fine ventricular fibrillation (VF). Coarse VF appears as larger waves on an EKG compared with the ...

Most of the time, you don't think about your heartbeat. It works quietly in the background of your day. But sometimes your ...

Electrical signals tell the heart to contract, but when the signals form spiral waves, they can lead to dangerous cardiac events like tachycardia and fibrillation. Researchers are bringing a new ...

Q: I was feeling lightheaded and having palpitations, went to the ER and was admitted me to the ICU. They said I had a run of ventricular tachycardia. What is this? A: The heartbeat is controlled by ...