The technology is in the tip


SonRtip is the only atrial pacing lead featuring an embedded hermetically-sealed micro-accelerometer.

The micro-accelerometer functions as a contractility sensor providing access to exciting new technologies in the treatment of heart failure

The SonRtip sensor is a piezoceramic transducer loaded by a platinum/iridium seismic mass, converting flexural stresses to electricity

A micro spring integrated into the sensor increases sensitivity while providing additional protection and shock resistance

The sensor signal is amplified and transmitted to the SonR CRT-D device through a micro electronic circuit to ensure long-term signal integrity

Easy, Safe, Accurate

  • SonRtip can be easily implanted anywhere in the atrial wall1,3
  • Accurately measures cardiac muscle vibrations that reflect the first heart sound from any position in the atrium2
  • Proven to be safe and effective1
  • 99.8% complication free from 4 to 12 months1

This allows for cardiac resynchronization therapy to be continuously adapted to the individual needs of each patient.


  • 1. Brugada J, Brachmann J, Delnoy PP et al. Contractility sensor-guided optimization of cardiac resynchronization therapy: results from the RESPOND-CRT trial. Eur Heart J , 2016 ; Vol 38 (10): 730-738

  • 2. Bongiorni MG, Soldati E, Arena G et al. Is local myocardial contractility related to endocardial acceleration signals detected by a transvenous pacing lead? Pacing Clin Electrophysiol. 1996;19:1682–1688. doi: 10.1111/j.1540-8159.1996.tb03206.x.

  • 3. Refer to user’s manual furnished with the device for complete instructions for use

Hear from the experts

Sensor-based CRT optimization with SonR: experts discuss the tangible benefits of individualized, automatic optimization and the technology behind it.

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The Key Results

Get an overview of the key results from the RESPOND-CRT trial including details on trial design and subgroup analyses.

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