Definition Placed in patients with VF or VT, long QT, HOCM (if VT or VF), post-MI (if EF < 30%), dilated cardiomyopathy. When a magnet is placed some will beep or emit continuous tone signifying anti-tachycardia function is disabled. Magnets usually do not effect anti-bradicardia functions. Different manufacturers’ devices respond slightly differently to magnet (hence […]