Heart Rate Variability in Adolescents Following Surgical Correction of Aortic Coarctation: Dataset

This dataset contains anonymized raw heart rate variability (HRV) data from adolescents aged 12–17 years during the long-term period after surgical correction of aortic coarctation (CoA) and from age- and sex-matched healthy peers. The dataset includes results of a 5-minute resting ECG analysis with HRV calculated in time-domain, frequency-domain, and nonlinear measures. Dataset structure (Excel file): Sheet 1: CoA group — demographic and anthropometric parameters, HRV indices (time domain, spectral, nonlinear measures) Sheet 2: Healthy control group — same parameters as above Description of HRV variables: Time-domain indices: SDNN, ms Standard deviation of normal RR-intervals RMSSD, ms Square root of the mean square of the mean square of the differences of consecutive RR-intervals pNN50, % Percentage of consecutive RR-intervals differing by more than 50 ms Frequency-domain indices: VLF, % Very low-frequency component of the heart rate spectrum LF, % Low-frequency component of the heart rate spectrum HF, % High-frequency component of the heart rate spectrum LF/HF low- to high-frequency components ratio Total power, ms2 Total power of the heart rate spectrum Nonlinear indices: SD1, ms Poincaré plot width, dispersion of point projections on a straight line perpendicular to the line of identity SD2, ms Poincaré plot length, dispersion of point projections on the line of identitySD2/SD1 SD2 to SD1 ratio ApEn Approximate entropy, an index of heart rate complexity and irregularity SampEn Sample entropy, index of heart rate complexity and irregularity Alpha DFA fractal dimension index of cardiac intervals time series Important note:Some cells contain empty values. These represent outliers identified and removed during statistical analysis to ensure data quality.