Ventricular bigeminy occurs when every other beat is a PVC. No treatment is necessary for PVCs. If symptomatic, beta-blockers or antiarrhythmic drugs can be effective. Rarely, ablation of PVCs is ...

The PVC conducts back to the atrium though the slow AV nodal pathway and then results in conduction back down the AV node to create the narrow-complex "echo beat". The P wave preceding the echo ...

uw.edu The most substantive change is the introduction of a ‘yellow’ box or list of borderline ECG findings in which two or more borderline findings warrant additional evaluation (figure 1).