Magnetic Gel Seals Heart Pouch to Cut Stroke Risk in Atrial Fibrillation

Researchers are testing a magnetically guided magnetogel injected into the left atrial appendage to seal it from within, potentially lowering stroke risk for atrial fibrillation patients. Animal studies in rats and pigs showed the gel forms a complete, smooth seal with the heart lining and avoids tissue damage seen with rigid implants, but the approach remains experimental with long safety, delivery, and MRI-compatibility concerns before human use.