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The ECG method is more accurate than the PPG method in measuring heart rate variability. [39] [43] Biofeedback therapists use heart rate variability (HRV) biofeedback when treating asthma, [44] COPD, [45] depression, [46] anxiety, [47] fibromyalgia, [48] heart disease, [49] and unexplained abdominal pain. [50] Research shows that HRV ...
Heart rate variability visualized with R-R interval changes Electrocardiogram (ECG) recording of a canine heart that illustrates beat-to-beat variability in R–R interval (top) and heart rate (bottom). Heart rate variability (HRV) is the physiological phenomenon of variation in the time interval between heartbeats. It is measured by the ...
The Bowditch effect, also known as the Treppe phenomenon or Treppe effect or Staircase Phenomenon, [1] [2] is an autoregulation method by which myocardial tension increases with an increase in heart rate. It was first observed by Henry Pickering Bowditch in 1871.
Overeaters Anonymous (OA) is a twelve-step program founded by Rozanne S. [1] Its first meeting was held in Hollywood, California, USA on January 19, 1960, after Rozanne attended a Gamblers Anonymous meeting and realized that the Twelve Steps could potentially help her with her own addictive behaviors relating to food. [1]
The HR is often used to compute the heart rate variability (HRV) a measure of the variability of the time interval between heartbeats. HRV is often used in the clinical field [6] to diagnose and monitor pathological conditions and their treatment, but also in the affective computing research to study new methods to assess the emotional state of ...
In most cases, vagal tone is not measured directly. Instead the processes affected by the vagus nerve – specifically heart rate and heart rate variability – are measured and used as a surrogate for vagal tone. Increased vagal tone (and thus vagal action) is generally associated with a lower heart rate and increased heart rate variability.
Monitoring of the heart rate can be performed as part of electrocardiography, but it can also be measured conveniently with specific heart rate monitors. Such heart rate monitors are largely used by performers of various types of physical exercise. A generic cardiac monitor has the following functions: A display of heart rate and heart rhythm
These parasympathetic neurons send axons to the heart and parasympathetic activity slows cardiac pacemaking and thus heart rate. This parasympathetic activity is further increased during conditions of elevated blood pressure. The parasympathetic nervous system is primarily directed toward the heart. [citation needed]