Johnson & Johnson’s JNJ MedTech unit has temporarily paused sales of Varipulse, its pulsed field ablation (PFA) therapy to treat atrial fibrillation (AFib) in the United States, as it investigates four reported cases of neurovascular events.

Johnson & Johnson shares are down 3% Wednesday on safety concerns that could dim sales prospects for a new heart device, while its rivals gained. J&J said it temporarily paused the use of the heart device,

(Reuters) -Johnson & Johnson said on Wednesday it had temporarily paused the rollout of its Varipulse heart device in the United States, as the company investigates four reported stroke events. The Manufacturer and User Facility Device Experience (MAUDE),