Coronary dilation catheters are used to open clogged blood vessels to improve blood flow to the heart, Abbot is recalling these devices due to failure of balloon to deflate in certain models, use may cause serious adverse health consequences, such as reduced blow flow to the heart and air embolism.

http://www.fda.gov/medical-devices/medical-device-recalls/abbott-vascular-recalls-nc-trek-rx-and-nc-traveler-rx-coronary-dilatation-catheters-due-failure