In the last few weeks, the Skeptical Cardiologist has had a run on with patients with premature atrial contractions (PACs). I've discussed in detail premature ventricular contractions (PVCs) here and ...

Atrial premature complexes (APCs) are a type of irregular heartbeat that originates in the atria. APCs cause premature heartbeats to occur. Depending on the cause, people may not require treatment.

DEAR DR. ROACH: What’s the difference between atrial fibrillation and premature ventricular contractions, aka PVCs (extra heartbeats)? -- M. ANSWER: Both AFib and PVCs are rhythm disturbances of the ...

Running has so many health benefits, it’s counterintuitive to consider any negative effects endurance training may have on the body. However, research suggests that some runners may be at higher risk ...