Sinus Arrhythmia

ECG Features

Figure 1: ECG Strip[1]

Sinus arrhythmia is a sinus rhythm with a beat-to-beat variation in the P-P interval, causing an irregular ventricular rate.[2]

Table 1: ECG Characteristics[3]

Clinical Significance[2]

  • Sinus arrhythmia is a normal physiological phenomenon seen in healthy individuals.
  • The incidence of sinus arrhythmia decreases with age.

ECM Features

Figure 2: ECM Analysis, Record 123[4][5]

ECM Examples

Additional Information


  1. Sinus Dysrhythmia [Online image]. (2014). Retrieved July 19, 2016, from
  2. Sinus Arrhythmia. (n.d.). Retrieved July 27, 2016, from
  3. Sinus Arrhythmia. (n.d.). Retrieved July 27, 2016, from
  4. MIT-BIH Arrhythmia Database. (1980). Retrieved June, 2016, from
  5. 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).