heart rate variability

RRRR1(time domain)frequency domain

(1)124QRSRR-R intervalR-R intervalNormal-to-Normal (NN) interval1. SDNN(standard deviation of all normal to normal

intervals)524

2. SDANN index (standard deviation of average normal to normal intervals index)5

3. SDNN index (standard deviation of all normal to normal intervals index)5

4. R-MSSD (The square root of the mean of the sum of the squares of differences between adjacent NN intervals)

5. NN50(Number of pairs of adjacent NN intervals differing by more than 50 ms in the entire recording)50

6. PNN50(NN50 count divided by the total number of all NN intervals)50

R-MSSDNN50PNN50

SDNN()SDANN()RMSSD()

(1)2(fast Fourier transformation, FFT)()

1. (total power, TP)

1 2

/()100

8. LF/HF/

LF

HF

(2,3)

(4,5)

2325

Kleiger (5)SDNNLVEFBigger(6)

Massin(7,8)

Heragu(9)

SDNN ms

SDANNindex

ms

5

SDNN index ms5

R-MSSD ms

NN50 %50

PNN50 None50

TP ms2

Butera (10)Fontan

FontanFontan

(11)Fontan

FontanButera(12)

Ohuchi (13)

Kaltman (14)

Niwa (15)

Shehab (16)

Longin(17)

Brown (18)

Ariagno (19)

Pizzi(20)

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