def METHOD_NAME():
    ecg_slow = nk.ecg_simulate(duration=60, sampling_rate=1000, heart_rate=60, random_state=42)
    ecg_fast = nk.ecg_simulate(duration=60, sampling_rate=1000, heart_rate=150, random_state=42)
    _, peaks_slow = nk.ecg_process(ecg_slow, sampling_rate=1000)
    _, peaks_fast = nk.ecg_process(ecg_fast, sampling_rate=1000)
    hrv_slow = nk.hrv_time(peaks_slow, sampling_rate=1000)
    hrv_fast = nk.hrv_time(peaks_fast, sampling_rate=1000)
    assert np.all(hrv_fast["HRV_RMSSD"] < hrv_slow["HRV_RMSSD"])
    assert np.all(hrv_fast["HRV_MeanNN"] < hrv_slow["HRV_MeanNN"])
    assert np.all(hrv_fast["HRV_SDNN"] < hrv_slow["HRV_SDNN"])
    assert np.all(hrv_fast["HRV_CVNN"] < hrv_slow["HRV_CVNN"])
    assert np.all(hrv_fast["HRV_CVSD"] < hrv_slow["HRV_CVSD"])
    assert np.all(hrv_fast["HRV_MedianNN"] < hrv_slow["HRV_MedianNN"])
    assert np.all(hrv_fast["HRV_MadNN"] < hrv_slow["HRV_MadNN"])
    assert np.all(hrv_fast["HRV_MCVNN"] < hrv_slow["HRV_MCVNN"])
    assert np.all(hrv_fast["HRV_pNN50"] == hrv_slow["HRV_pNN50"])
    assert np.all(hrv_fast["HRV_pNN20"] < hrv_slow["HRV_pNN20"])
    assert np.all(hrv_fast["HRV_TINN"] < hrv_slow["HRV_TINN"])
    assert np.all(hrv_fast["HRV_HTI"] != hrv_slow["HRV_HTI"])