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 ...

SAN FRANCISCO, CA — Knowing the number of hourly premature atrial contractions (PACs) a patient has is as good as the Framingham atrial fibrillation (AF) risk algorithm in predicting five- to 15-year ...

Most of us have had that unsettling sensation when our heart seems to flutter or "skip" a beat — but when heart palpitations start happening more frequently, you may wonder if it’s something to get ...

If a premature atrial contraction occurs when the AV node has not yer recovered from the refractory period, the PAC will fail to conduct to the ventricles and there will not be a QRS complex ...

Note the premature ventricular contraction (PVC) that triggers the AVNRT in this ECG. If a premature atrial contraction (PAC) or premature ventricular contraction (PVC) occurs at the right time, the ...

Breathing in tiny particles of air pollution may trigger irregular heart rhythms in otherwise healthy teenagers and increase their risk of sudden cardiac death, a new study has found. The study, ...

A new study has some heartening news for coffee lovers: That morning cup is unlikely to make your heart skip a beat. The study, published Thursday in the New England Journal of Medicine, found that ...