Heart Rate Variability Analysis

Heart Rate Variability Analysis

Heart rate variability is the physiological phenomenon of variation in the time interval between heartbeats. It is measured by the variation in the beat-to-beat interval. HRV shows independent associations with a great variety of known personal and environmental cardiovascular risk factors.

Heart rate variability (HRV) is a method of measurement for variations in the heart rate. It is usually calculated by dividing the time series of beat-to-beat intervals in the ECG or the course of the arterial pressure curve to be analyzed. Various measurements of heart rate variability have been established. These can be broadly divided into time domain, frequency domain and nonlinear measurements. HRV is considered as an indicator of the activity of the autonomic regulation of circulatory function. It is also regarded as a definitive method for analyzing the activity of the autonomic nervous system. It is reported that changes (especially reduction) of the HRV with various pathological conditions such as hypertension, hemorrhagic shock and septic shock are connected. The HRV plays an important role as a predictor of mortality after acute myocardial infarction.

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