AdaptivCRT Algorithm Cardiac Device Features


The AdaptivCRT™ Algorithm Optimizes CRT Pacing Every Minute Whether AV Conduction Is Normal, Prolonged, or Blocked

It adapts to meet the constantly changing needs of CRT patients because it responds to what he or she is doing and automatically decides when and how to pace the heart. 

The AdaptivCRT Algorithm has two different modes:

  • AdaptivCRT LV Only Pacing occurs during normal AV conduction when the heart rate is less than or equal to 100 beats per minute. It also optimizes A-V timing and minimizes right ventricular (RV) pacing.
  • AdaptivCRT BiV Pacing occurs during prolonged/blocked AV conduction or when the heart rate is greater than 100 beats per minute. It also optimizes A-V and V-V timing. 

For more information on the AdaptivCRT Algorithm feature go to:

Image of AdaptivCRT LV Only pacing and AdaptivCRT BiV pacing.

Regardless of conduction status, the AdaptivCRT Algorithm:


Chart showing that AdpativCRT reduces a patient’s odds of a 30-Day HF Readmission* by 59%.

Reduces a patient’s odds of a 30-Day HF Readmission* by 59%1

Chart showing AdaptivCRT reduces the risk of AF by 46%.

Reduces the risk of AF by 46%2



Readmissions following an HF hospitalization.


Starling RC, et al. JACC Heart Fail. 2015;3:565-572.


Martin D, et al. Clinical Outcomes with Adaptive Cardiac Resynchronization Therapy: Long-term Outcomes of the Adaptive CRT Trial. Late-breaking Clinical Trial. Presented at HFSA 2013.


Varma N, et al. Influence of automatic frequent pace-timing adjustments on effective left ventricular pacing during cardiac resynchronization therapy. Europace. Published online May 26, 2016.