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 ...

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 ...

However, most trials could not prove relevant effects of CRT in patients with a QRS duration of less than 150 ms. Molema et al. demonstrated that baseline QRS duration was not predictive for clinical ...

The correct diagnosis is atrial fibrillation with PVC and Ashman phenomenon (Figure 2). The rhythm is irregularly irregular without any organized atrial activity. Most of the QRS complexes are narrow, ...

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

Atrial premature complexes (APCs) are early heartbeats originating in the atria, often causing palpitations or a feeling of skipped beats, and are usually harmless unless frequent or accompanied by ...

Do you ever feel like your heart misses a beat? There’s a good chance that what you noticed was a heartbeat that happened sooner than it usually does. When that happens, and then follows up with a ...

We reviewed randomized controlled trials, review articles and clinical practice guidelines to present a practical approach to the diagnosis and management of SVTs (Box 1). We focus on the most common ...

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.

COMPLETE heart block, with slow, regular ventricular beats, usually gives rise to a systolic murmur. 1–4 Generally, this murmur is thought to result from the large stroke volume, which produces rapid ...