PACs and PVCs are usually harmless but can sometimes indicate underlying heart disease. Atrial fibrillation (AFib) is common and originates within the atria, causing them to "quiver" or fibrillate.

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 ...

Unlike premature atrial contractions, or PACs, usually narrow-complexed because ... Ventricular bigeminy occurs when every other beat is a PVC. No treatment is necessary for PVCs.

and sinus with premature atrial contraction (PAC) or premature ventricular contraction (PVC). HeartBeam submitted the application based on the pivotal VALID-ECG study data. This trial involved 198 ...