Logic design project Heart rate variability methods

Jun 18th, 2015
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Heart rate variability (HRV) is a physiological phenomenon where the time interval between heart beats varies. It is measured by the variation in the beat-to-beat interval. Other terms used include: "cycle length variability", "RR variability" (where R is a point corresponding to the peak of the QRS complex of the ECG wave; and RR is the interval between successive Rs), and "heart period variability". See also Heart rate turbulence, Sinus rhythm. Methods used to detect beats include: ECG, blood pressure, and the pulse wave signal derived from a photoplethysmograph (PPG). ECG is considered superior because it provides a clear waveform, which makes it easier to exclude heartbeats not originating in the sinoatrial node. The term "NN" is used in place of RR to emphasize the fact that the processed beats are "normal" beats.

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Logic designprojectHeart ratevariability methodsBy,Bharghav mk(1RV10IT011)K.R.Vinay chander(1RV10IT020)Shreehari H(1RV10IT0--)IntroductionHeart rate variability (HRV) is a physiological phenomenon where the timeinterval between heart beats varies. It is measured by the variation in the beat-tobeat interval.Other terms used include: "cycle length variability", "RR variability" (where R is apoint corresponding to the peak of the QRS complex of the ECG wave; and RRis the interval between successive Rs), and "heart period variability".See also Heart rate turbulence, Sinus rhythm.Methods used to detect beats include: ECG, blood pressure, and the pulse wavesignal derived from a photoplethysmograph (PPG). ECG is considered superiorbecause it provides a clear waveform, which makes it easier to excludeheartbeats not originating in the sinoatrial node. The term "NN" is used in placeof RR to emphasize the fact that the processed beats are "normal" beats.Clinical significanceReduced HRV has been shown to be a predictor of mortality after myocardialinfarction although others have shown that the information in HRV relevant toacute myocardial infarction survival is fully contained in the mean heart rate. Arange of other outcomes/conditions may also be associated with modified(usually lower) HRV, including congestive heart failure, diabetic neuropathy,depression post-cardiac transplant, susceptibility to SIDS and poor survival inpremature babies.HRV studies ha

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