Heart rate turbulence
Heart rate turbulence
Heart rate turbulence (HRT) (pronunciation: /hɑːrt reɪt ˈtɜːrbjʊləns/) is a physiological phenomenon where the heart rate follows a specific pattern following a premature ventricular contraction (PVC). It is a parameter that can be used to assess the risk of cardiac arrhythmia and sudden cardiac death.
Etymology
The term "heart rate turbulence" was coined in the late 20th century. It is derived from the English words "heart", "rate", and "turbulence". "Heart" comes from the Old English heorte, "rate" from the Latin rata, and "turbulence" from the Latin turbulentia.
Definition
Heart rate turbulence refers to the short-term fluctuation in heart rate that occurs in response to a PVC. This phenomenon is characterized by an initial acceleration of the heart rate, followed by a gradual deceleration. The magnitude and timing of these changes can provide important information about the functioning of the autonomic nervous system and the risk of cardiac events.
Related terms
- Premature ventricular contraction: An extra heartbeat that disrupts the regular rhythm of the heart. It is often the trigger for heart rate turbulence.
- Cardiac arrhythmia: A group of conditions characterized by an irregular heartbeat. Heart rate turbulence can be used to predict the risk of certain types of arrhythmias.
- Autonomic nervous system: The part of the nervous system that controls involuntary actions, such as heart rate. The response of the autonomic nervous system to a PVC is believed to be responsible for heart rate turbulence.
See also
External links
- Medical encyclopedia article on Heart rate turbulence
- Wikipedia's article - Heart rate turbulence
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