Ventricular Fusion Beats

ECG Features

Figure 1: ECG Strip[1]

A fusion beat occurs when "a supraventricular and a ventricular impulse coincide to produce a hybrid complex."[2] A ventricular fusion beat or fusion PVC is produced when these electrical impulses coincide in the ventricular chambers. Fusion beats are seen with ventricular tachycardia (Figure 1) and accelerated idioventricular rhythm.[2]

ECM Features

Figure 2: ECM Analysis, Record 201[3][4]

ECM Examples

Figure 3: Record 108[3][4]

3. Fusion PVC/PVC Couplet

Figure 4: Record 108[3][4]

Figure 5: Record 214[3][4]

Figure 6: Record 233[3][4]

Additional Information


  1. Fusion Beats [Online image]. (2011). Retrieved July 19, 2016, from
  2. Fusion Beats. (n.d.). Retrieved July 27, 2016, from
  3. MIT-BIH Arrhythmia Database. (1980). Retrieved June, 2016, from
  4. Goldberger AL, Amaral LAN, Glass L, Hausdorff JM, Ivanov PCh, Mark RG, Mietus JE, Moody GB, Peng C-K, Stanley HE. PhysioBank, PhysioToolkit, and PhysioNet: Components of a New Research Resource for Complex Physiologic Signals. Circulation101(23):e215-e220 [Circulation Electronic Pages;]; 2000 (June 13).