Catheterization of central veins is a routine process, especially in severely-ill patients. It is a technique associated with multiple potential complications, fortunately infrequent, depending on the skill with which it is performed. Cardiac blockade is one of these infrequent complications with a high mortality. We describe a case in which suspicion, early diagnosis, and immediate manipulative treatment allowed a successful recovery of the patient. In addition, the literature is reviewed and possible mechanisms involved in these episodes are discussed.