Interbeat interval
Encyclopedia
Interbeat interval is a scientific term used in the study of the mammalian heart
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. Interbeat interval is abbreviated "IBI" and is sometimes written with a hyphen, "inter-beat interval." It is also sometimes referred to as "beat-to-beat" interval.
IBI is generally measured in units of milliseconds. Individual human heart IBI values can vary from as short as 5 milliseconds to as long as 70 milliseconds. In normal heart function, each IBI value varies from beat to beat. This natural variation is known as heart rate variability (HRV). However, certain cardiac conditions may cause the individual IBI values to become nearly constant, resulting in the HRV being nearly zero. This can happen, for example, during periods of exercise as the heart rate increases and the beats become regular. Certain illnesses can cause the heart rate to increase and become uniform as well, such as when a subject is afflicted by an infection.
Heart
The heart is a myogenic muscular organ found in all animals with a circulatory system , that is responsible for pumping blood throughout the blood vessels by repeated, rhythmic contractions...
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Definition
Interbeat interval is a scientific term used in reference to the time interval between individual beats of the mammalian heartHeart
The heart is a myogenic muscular organ found in all animals with a circulatory system , that is responsible for pumping blood throughout the blood vessels by repeated, rhythmic contractions...
. Interbeat interval is abbreviated "IBI" and is sometimes written with a hyphen, "inter-beat interval." It is also sometimes referred to as "beat-to-beat" interval.
IBI is generally measured in units of milliseconds. Individual human heart IBI values can vary from as short as 5 milliseconds to as long as 70 milliseconds. In normal heart function, each IBI value varies from beat to beat. This natural variation is known as heart rate variability (HRV). However, certain cardiac conditions may cause the individual IBI values to become nearly constant, resulting in the HRV being nearly zero. This can happen, for example, during periods of exercise as the heart rate increases and the beats become regular. Certain illnesses can cause the heart rate to increase and become uniform as well, such as when a subject is afflicted by an infection.