A 2:1 atrioventricular block presenting paradoxical ventriculophasic response

Ann Noninvasive Electrocardiol. 2019 Jul;24(4):e12642. doi: 10.1111/anec.12642. Epub 2019 Mar 19.


Ventriculophasic response (VR) is defined as the shortening of the sinus cycle length in the setting of greater than second-degree atrioventricular (AV) block. Typically, the PP intervals interposing a QRS complex are shorter than those without a QRS complex. Paradoxical VR is a rare clinical entity. We report about an 80-year-old man presenting with a 2:1 AV block, in whom typical and paradoxical VRs were observed.

Keywords: atrioventricular block; chronotropic effect; ventriculophasic response.

Publication types

  • Case Reports

MeSH terms

  • Aged, 80 and over
  • Atrioventricular Block / diagnosis*
  • Atrioventricular Block / physiopathology*
  • Atrioventricular Block / therapy
  • Electrocardiography / methods*
  • Humans
  • Male
  • Pacemaker, Artificial