Harnessing Piezoelectric poly-L-lactic acid (PLLA) for Enhanced Sensing for Aortic Annuloplasty

We assessed the piezoelectric performance of poly-L-lactic acid (PLLA) films, fabricated using solvent casting and processed using uniaxial stretching and thermal annealing, through tapping, straining, and force- and vibration-sweep tests. The ventricular chamber was connected to a digitally controlled piston pump (Super Pump, ViVitro, Victoria, BC, Canada), which provided pulsatile flow to simulate left ventricular ejection into the aortic root. These results establish the feasibility of PLLA-based sensors for real-time biomechanical feedback during and after cardiovascular surgeries, paving the way for next-generation monitoring technologies that enhance patient outcomes.