Abstract: Systems and methods for measuring hemodynamic parameters with wearable cardiovascular sensing. An apparatus can include one or more sensors configured to measure an electrocardiogram signal of a user and one or more seismocardiogram (SCG) signals of the user, a memory and a processing system including one or more processors operatively coupled to the memory and the one or more sensors, and configured to receive the electrocardiogram and one or more SCG signals, and generate an assessment of heart health by determining one or more hemodynamic parameters based on the signals. The invention further includes a method for non-invasively monitoring heart health of a user including receiving an electrocardiogram signal from a first sensor of a wearable device, receiving one or more SCG signals from a second sensor of the wearable device, and generating the assessment of the heart health of the user by determining the one or more hemodynamic parameters.

Abstract: In Spinal Cord Stimulation (SCS) systems having sensing capability, conventional wisdom seeks to minimize or avoid sensing of stimulation artifacts caused by the stimulation. Despite this, the present disclosure recognizes that stimulation artifacts in and of itself can include useful information relevant to operation of the SCS implant and/or the status of the patient. In particular, stimulation artifact features as sensed canbe used to determine a posture or activity of the patient, or more generally to adjust the stimulation program that the SCS implant is providing. Furthermore, sensing of stimulation artifact features can be as useful as, and possibly even more useful than, information gleaned from sensing neural responses to stimulation, such as Evoked Compound Action Potentials (ECAPs).