Scientists have developed a device which they say could help patients who would otherwise need heart surgery. Researchers told the American Cardiology Conference a tiny metal clip could help patients with a faulty heart valve. Patients currently have invasive surgery to replace the valve, so their heart can work properly. But the researchers said the clip, fed to the heart via a vein, repaired the valve so patients did not need surgery. Heart works harder Doctors in the US have so far used the clip to treat 10 patients with mitral regurgitation, where the mitral valve, which regulates the flow...