Atrial Bigeminy

ECG Features

Figure 1: ECG Strip[1]

Atrial bigeminy is a sinus rhythm that occurs when every other beat is a premature atrial contraction (PAC).

Clinical Significance

  • Atrial bigeminy is a manifestation of PACs; therefore, in most cases it is a harmless rhythm.

ECM Features

Figure 2: ECM Analysis, Record 222[2][3]

Additional Information


  1. Wahyu, I. (2012). Premature Atrial Contraction (PAC) [Online image]. Retrieved July 19, 2016, from
  2. MIT-BIH Arrhythmia Database. (1980). Retrieved June, 2016, from
  3. 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).