Javelin Medical is developing a device to prevent stroke in individuals with abnormal heart rhythm (atrial fibrillation). The company's device, Vine, is a permanent filter implanted in the carotid arteries designed to prevent strokes from occurring by intercepting blood clots. Vine is implanted through a thin needle in a short, simple procedure. It is currently available for individuals with atrial fibrillation through participation in the CAPTURE II study in several European countries.