British Thermal Unit is a standard unit of energy that is measured at about 1055 joules. The British Thermal Unit (BTU or Btu) is primarily used in the United States more than in the United Kingdom. This energy unit is the total amount of thermal energy that is required to heat or cool 1 pound of water significantly by 1Â°Fahrenheit.
Bradyphrenia is a neurological term referring to the slowness of thought common to many disorders of the brain.
Bradycardia vs. Symptomatic Bradycardia. Bradycardia is defined as any rhythm disorder with a heart rate less than 60 beats per minute. (Typically it will be. Symptomatic bradycardia however is defined as a heart rate less than 60/min that elicits signs and symptoms, but the heart rate will usually be less than 50/min.