Pulse Biosciences hits 164-patient enrollment target in NANOPULSE-AF pivotal IDE study
Pulse Biosciences (PLSE) completed enrollment of 164 patients in its NANOPULSE-AF study, three months ahead of schedule. The study evaluates the nPulse Cardiac Catheter System for drug-resistant atrial fibrillation. Primary endpoints will be assessed at 6 and 12 months post-ablation, with updates planned as follow-ups conclude.
How this was made

The 30-second read
Why it matters
The enrollment milestone reduces execution risk for the pivotal study, potentially accelerating path to market and influencing valuation.
Market read
First‑time disclosure of trial enrollment completion; likely to move PLSE on the day of release.
What to watch
Regulatory review timelines and reimbursement landscape could moderate the stock's upside despite enrollment progress.
Background
Pulse Biosciences is developing the nPulse Cardiac Catheter System for drug‑resistant paroxysmal atrial fibrillation. The IDE study is non‑randomized and aims to assess safety and effectiveness at 6‑ and 12‑month follow‑up.
Ticker impact
Pulse Biosciences announced it reached the 164-patient enrollment target for its NANOPULSE‑AF pivotal IDE study, completing enrollment three months ahead of schedule.
upward pressure as the market prices in the positive trial milestone
The enrollment hit is a primary disclosure of material clinical‑trial progress for a micro‑cap biotech, which typically moves the stock on the news.
Market effects
May lift other cardiac‑ablation and electrophysiology biotech peers as investors reassess trial timelines.
Limited to U.S. biotech sector; no broader regional effect.
Low; relevance confined to niche medical‑device biotech space.
Counterpoint
If the trial later shows safety or efficacy issues, the early enrollment success could be overstated.
Key entities
- companyPulse Biosciences, Inc.
Developer of the nPulse Cardiac Catheter System.