Heart failure monitoring with a cardiac resynchronization therapy device-based cardiac contractility sensor: a case series.
BACKGROUND
The SonR signal has been shown to reflect cardiac contractility. It is recorded with an atrial lead connected to a cardiac resynchronization therapy defibrillator. For the first time, clinical evidence on the use of the SonR signal in the monitoring of the clinical status of heart failure patients implanted with cardiac resynchronization therapy defibrillator are presented through three clinical cases.


METHODS
In the two first patients (non-Hispanic/Latino white), the SonR amplitude increases concomitantly to clinical status improvement subsequent to cardiac resynchronization therapy defibrillator implantation. In the third patient (non-Hispanic/Latino white), a decrease in SonR amplitude is observed concomitantly to atrial fibrillation and clinical status deterioration.


CONCLUSIONS
This case series reports the association between SonR signal amplitude changes and patients' clinical status. Combined with remote monitoring, early SonR signal amplitude remote monitoring could be a promising tool for heart failure patients' management.
Department of Cardiology, University Hospital of Brest, Hôpital de la Cavale Blanche, Boulevard Tanguy Prigent, 29609 Brest, France. jacques.mansourati@chu-brest.fr.
Jacques
J
Mansourati
Mélanie
M
Heurteau
Jérôme
J
Abaléa