ecg - Search - Sleep Data - National Sleep Research Resource

Major ECG Abnormalities

ecg_maj under Clinical Data/Diagnostic Studies/Neurocognitive in HCHS variables

This variable is defined only for participants that have ECG data.

Minor ECG Abnormalities

ecg_min under Clinical Data/Diagnostic Studies/Neurocognitive in HCHS variables

This variable is defined only for participants that have ECG data.

MI defined by ECG results

mi_ecg under Medical History in HCHS variables

This variable checks some ECG measures to detect possible old MIs.

Has electrocardiogram (ECG) data (Sleep Heart Health Study Visit One (SHHS1))

ecg under Administrative/SHHS1 in SHHS variables

Number of days since the baseline Polysomnography (PSG) until collected: electrocardiogram (ECG)

ecgdate under Clinical Data/Diagnostic Studies/Electrocardiogram in SHHS variables

Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

PSG Quality Assessment: hours of usable HR

hrdur under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Number of hours of usable signal from heart rate (ECG) leads as assessed by scorer.

PSG Quality Assessment: Signal Quality (hr)

quhr under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Overall quality of signal from heart rate (ECG) leads during sleep as assessed by scorer.

Acceptable ECG signal quality

poquhr under Sleep Monitoring/Polysomnography/Signal Quality in MROS variables

ECG channel: Hours of usable signal

ecghrs under Sleep Monitoring/Polysomnography/Signal Quality in HEARTBEAT variables

ECG channel: Proportion of valid signal time

ecgqual under Sleep Monitoring/Polysomnography/Signal Quality in HEARTBEAT variables

b3. Specific heart rate and/or ECG finding (No/Yes)

alertecgyn_f1t3 under Sleep Monitoring/Polysomnography/Administrative in NUMOM2B variables

Prevalent Coronary Heart Disease, including self-report

prechd_angina under Medical History in HCHS variables

This variable combines ECG reports of possible old MI as well as self-report of angina, heart attack, or procedure (angioplasty, stent, bypass).

Prevalent Coronary Heart Disease

prechd_no_angina under Medical History in HCHS variables

This variable combines ECG reports of possible old MI as well as self-report of heart attack, or procedure (angioplasty, stent, bypass).

Has a doctor ever told you that you have an abnormal EKG, ECG, or electrocardiogram?

v4ekg under Medical History in SOF variables

This variable was collected at visit 4, a different timepoint than the 'Visit 8' sleep variables

Hours of usable ECG based on total recording time (TRT)

htdur under Sleep Monitoring/Polysomnography/Signal Quality in SOF variables

Atrial Fibrillation or Flutter

afib under Clinical Data/Diagnostic Studies/Electrocardiogram in SHHS variables

Minnesota (MN) code 8-3-1 or 8-3-2. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

Anterolateral myocardial infarction (MI)

antlatmi under Clinical Data/Diagnostic Studies/Electrocardiogram in SHHS variables

Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

Anteroseptal myocardial infarction (MI)

antsepmi under Clinical Data/Diagnostic Studies/Electrocardiogram in SHHS variables

Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

Atrial bypasses

apbs under Clinical Data/Diagnostic Studies/Electrocardiogram in SHHS variables

Minnesota (MN) code 8-1-1. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

First degree atrioventricular block

av1deg under Clinical Data/Diagnostic Studies/Electrocardiogram in SHHS variables

Minnesota (MN) code 6-3. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

Third degree atrioventricular block

av3deg under Clinical Data/Diagnostic Studies/Electrocardiogram in SHHS variables

Minnesota (MN) code 6-1. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

Incomplete left bundle-branch block

ilbbb under Clinical Data/Diagnostic Studies/Electrocardiogram in SHHS variables

Minnesota (MN) code 7-6. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

Inferior myocardial infarction (MI)

infmi under Clinical Data/Diagnostic Studies/Electrocardiogram in SHHS variables

Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

Incomplete right bundle-branch block

irbbb under Clinical Data/Diagnostic Studies/Electrocardiogram in SHHS variables

Minnesota (MN) code 7-3. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

Indeterminate intraventricular block pattern

iventblk under Clinical Data/Diagnostic Studies/Electrocardiogram in SHHS variables

Minnesota (MN) code 7-4. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.