The focus of our work on cardio-postural analysis is to establish a cause and effect relationship between cardiovascular and postural variables. Previous research indicates that cardiovascular and postural system interacts with each other to maintain equilibrium, however, cause and effect relationship between such systems is yet to be established. A statistical Granger causality test was conducted to find a causal relationship between blood pressureand resultant center of pressure (COPr). Our preliminary results based on a study of 7 subjects during quiet stance indicate existence of bi directional interaction between such systems. Most recently we are working towards generalizing the cause and effect relationship between cardio-postural systems by incorporating more cardio-postural variables and using bigger data size. The cardiovascular variables that we are currently using are cardiac output, systolic and diastolic blood pressure while the postural variables currently used are medio-lateral sway (COPx), anterior-posterior sway (COPy), COPr and electromyogram (EMG). This work is done in collaboration with researchers from Simon Fraser University, Burnaby, Canada. Figure below shows set up for experimental dataacquisition.
 A.K. Verma, A. Garg, A. Blaber, R. Fazel-Rezai, and K. Tavakolian, “Causality in the Cardio-Postural Interactions during Quiet Stance”, Computing in Cardiology 2015.