The Respond CRT system is a unique combination of a cardiac contractility sensor with an advanced AV & VV delay optimization algorithm.
The SonR sensor consists of a micro accelerometer embedded in the tip of the SonRtip atrial lead.
The sensor picks up cardiac muscle vibrations that reflect the heart sounds1. SonR signal amplitude is a surrogate for cardiac contractility and correlates with LV dP/dt max. 2
Using the continuous measurements of contractility picked up by the sonR sensor, the SonR algorithm performs weekly optimization of the patient’s AV and VV intervals both at rest and during exercise.
1. Tassin A, Kobeissi A, Vitali L et al. Relationship between amplitude and timing of heart sounds and endocardial acceleration. Pacing Clin Electrophysiol 2009;32(Suppl. 1):S101-104.
2. Bordachar P, Garrigue S, Ritter P et al. Contributions of a hemodyamic sensor embedded in an atrial lead in a porcine model. J Cardiovasc Electrophysiol. 2011 May;22(5):579-83
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