The STEP Study, sponsored by AtaCor Medical, is a first in man clinical trial evaluating the MACH I Delivery Tool combined with the STEALTH-TRAC Pacing lead as a single unit. The study enrolls up to 15 patients who will undergo acute and subacute testing of a temporary pacing systems safety and effectiveness. The Step Study is currently enrolling in Paraguay. The protocol and the device system  being tested involves human prototypes that are based on the early feasibility and device development experiments that have been reported recently in Circulation: Arrhythmia and Electrophysiology.