Protaryx Medical has picked up $8.3 million to develop its device for precision transseptal access to the left atrium for use during structural heart and catheter ablation procedures. The funding includes nondilutive grants and a seed round totaling $3.2 million, as well as the recently closed $5.1 million series A financing led by Ajax Health, with participation from returning investor University of Maryland (UM) Ventures.