Ventricular arrhythmias.
D001145:Arrhythmias, Cardiac / Q000209:etiology*; D005117:Cardiac Complexes, Premature / Q000209:etiology; D003937:Diagnosis, Differential; D006352:Heart Ventricles; D006801:Humans; D010138:Pacemaker, Artificial / Q000009:adverse effects; D013610:Tachycardia / Q000175:diagnosis / Q000209:etiology