Protecting patients for over 20 years.

World's first dual-chamber discrimination algorithm.

Parad+TM is a dual-chamber discrimination algorithm which discriminates ventricular tachycardia from supraventricular tachycardia or sinus tachycardia.

It has been designed with the typical ECG characteristics of the different tachycardia rhythms.

By featuring AF DetectTM, Parad+TM is the only discriminator to include beat-to-beat R-R long cycle search to distinguish stable, rapidly conducted AF from VT.

  • Best in class 99% specificity1
  • Low inappropriate shock rate2
  • Immediate protection with Parad+TM out-of-the-box settings*

*Not applicable to US devices



How it works

Parad+TM discriminates ventricular tachycardia from supraventricular or sinus tachycardia based on the following criteria:

  1. RR stability: stable or unstable?
  2. PR association: associated or dissociated? If dissociated, long cycle search is triggered (AF DetectTM).
  3. Level of PR association: N:1 or 1:1?
  4. Acceleration: sudden or gradual?
  5. Origin of acceleration: atrial or ventricular?


Parad+TM is the best-in-class arrhythmia discrimination algorithm with 99% specifity.1
The OPTION study demonstrated a low inappropriate shock rate at only 2.6% at one year with conventional settings*.2

*Conventional settings:
VT zone [170-200] bpm, 12 cycles persistence
VF zone > 200 bpm, 6 cycles persistence



  1. Hintringer F, et al. Comparison of the Specificity of Implantable Dual Chamber Defibrillator Detection Algorithms. Pacing Clin Electrophysiol. 2004;27:976–82.
  2. Kolb C, et al. Reduced Risk for Inappropriate Implantable Cardioverter-Defibrillator Shocks With Dual-Chamber Therapy Compared With Single-Chamber Therapy.
    Results of the randomized Option study. JACC Heart Failure 2014;2:611–19.
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