hf - Search - Sleep Data - National Sleep Research Resource

hf_n under Clinical Data/Diagnostic Studies/Heart Rate Variability in SHHS variables

any_cvd under Medical History in WSC variables

1=Yes if Y to any of the following: heartattack_ynd, congestive_hf_ynd, coronary_ynd, atheroscl_ynd, pacemaker_ynd, angioplasty_ynd, coronary_bypass_ynd, coronary_artery_stent, other_heart_surgery (including cardiac conversion, heart catheter, cardiac ablation, abdominal aortic repair, open heart surgery, defibrillation)

High frequency power: the normal sinus to normal sinus interbeat (NN) interval spectral power between 0.15 and 0.4 Hz

hf under Clinical Data/Diagnostic Studies/Heart Rate Variability in SHHS variables

The ratio of low to high frequency power

lf_hf under Clinical Data/Diagnostic Studies/Heart Rate Variability in SHHS variables

High frequency power: the normal sinus to normal sinus interbeat (NN) interval spectral power between 0.15 and 0.4 Hz

hf under Clinical Data/Diagnostic Studies/Heart Rate Variability in CHAT variables

The ratio of low to high frequency power

lf_hf under Clinical Data/Diagnostic Studies/Heart Rate Variability in CHAT variables

Normal-to-normal intervals between 0.15 and 0.4 Hz, full night: Total spectral power

hf_fn5 under Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night in MESA variables

Low frequency power / high frequency power, full night

lf_hf_fn5 under Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night in MESA variables

Normal-to-normal intervals between 0.15 and 0.4 Hz, non-overlapping windows: Total spectral power

hf_5m5 under Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows in MESA variables

Low frequency power / high frequency power, non-overlapping windows

lf_hf_5m5 under Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows in MESA variables

Low frequency power (normalized)

lf_n under Clinical Data/Diagnostic Studies/Heart Rate Variability in SHHS variables

Sympathomimetics, Oral And Inhaled (Sleep Heart Health Study Visit One (SHHS1))

sympth1 under Medical History/Medications/SHHS1 in SHHS variables

Participant taking SYMPATHOMIMETICS, ORAL AND INHALED within two weeks of the Sleep Heart Health Study Visit One (SHHS1) visit. All medications were recorded during the interview, and medication information was later categorized by physician review.

Sympathomimetics, Oral And Inhaled (Sleep Heart Health Study Visit Two (SHHS2))

sympth2 under Medical History/Medications/SHHS2 in SHHS variables

Participant taking SYMPATHOMIMETICS, ORAL AND INHALED within two weeks of the Sleep Heart Health Study Visit Two (SHHS2) visit. All medications were recorded during the interview, and medication information was later categorized by physician review.