“…Metabolic derangements such as hypoxia, hypothermia, acidosis, hyperkalemia, and hypercalcemia and endocrinologic disturbancesVmost notably, a hypothyroid stateVmay each precipitate bradycardia, although in this patient, none of these were suspected or, if tested, confirmed. 1 A number of neurologic conditions are known to result in bradycardia, and in this previously well patient who sustained a closed head injury, these warrant special attention. As alluded to in the case presentation previously mentioned, increased intracranial pressure must always be strongly considered in any patient with traumatic head injury presenting with bradycardia, as Cushing's triad of hypertension, bradycardia, and respiratory irregularity leading to apnea signifies elevated intracranial pressure until proven otherwise.…”