A new tool resembling a wiry flower at the end of a long tube is at the center of a multibillion-dollar race among Medtronic, Boston Scientific, and Johnson & Johnson MedTech to dominate the market for minimally invasive devices treating atrial fibrillation using pulsed field ablation (PFA). PFA, which uses electric pulses instead of heat or cooling, is expected to significantly reduce patient time in the cath lab and lower complication risks. Medtech executives view PFA as a transformative technology driving future growth, with Clarivate projecting PFA devices to exceed $1.3 billion in global sales this year.