Abbrevations

α₁

short term fractal-like correlations of RR interval data

α₂

long term fractal-like correlations of RR interval data

β

slope of the power-law relationship of RR interval data

CAD

coronary artery disease

ECG

electrocardiography

EF

ejection fraction

HF

high frequency

HR

heart rate

LF

low frequency

MI

yocardial infarction

NSVT

nonsustained ventricular tachycardia

NYHA

New York Heart Association

SD

standard deviation

SD1

standard deviation of instantaneous beat-to-beat variability

SD2

standard deviation of continuous long term RR interval variability

SDANN

standard deviation of RR intervals of measured segment

SDNN

standard deviation of RR intervals of 24-hour recording

VF

ventricular fibrillation

VLF

very low frequency

VPB

ventricular premature beat

VT

ventricular tachycardia

ULF

ultra low frequency