A young dancer was left on the brink of death after being fitted with a pacemaker which should have saved her life - but instead infected her with a killer bug.Traumatised Mikayla Meres, 21, shared shocking photos of her "hanging on by a thread" in hospital after bacteria on the device sent her into septic shock. She suffers from a condition which caused erratic heartbeat and was forced to give up modern and contemporary dance aged 17 as a result. Doctors said surgery to implant a heart rate-regulating pacemaker might fix the problem and Mikayla hoped it would help her get back up on stage. But within 48 hours of the operation last November she was in agony and unable to move with endocarditis, an infection in her heart valve, which had turned septic.