Many patients who underwent cardiothoracic surgery where a 3T heater cooler unit was used have been developing serious life-threatening infections. Sadly, in many cases, patients have died. These infections have been identified as Mycobacterium chimaera (M. chimaera). Many have been linked to the 3T heater cooler unit manufactured in Germany by LivaNova (formerly Sorin). The Sorin 3T Heater-Cooler System is used during open-heart surgery to regulate a patient’s body temperature.