IWR6843: Heart-Beat detection

Part Number: IWR6843

Hi,

we are trying to develop an application that basically captures heart-beat signal using the radar sensor.

We have a few questions, about this part. We want a radar sensor that can provide us with high accuracy for capturing human heart waveform signal with fine resolution. 

  1. What would be the minimum detected displacement? 
  2. If this part isn't suitable, do you have recomendations for other parts that might do well for this application

Regards,
Gurmat