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Thank you for the prompt reply. Thanks for letting me know that 12 leads ECG and Polysomnography(PSG) are different experiments.
Thank you for the prompt reply. I tried to check ECG signal in 131 records (shhs1-200001~200131), but only shhs1-200074 looks like lead II, other records ECG looks like lead aVR. Is that an ECG upside-down? Is there a marker 'Invert'?
Which one of the ECG 12 lead correspond to ECG in SHHS1 Database?
How does 2 snap electrodes measure 2 ECG Leads in MrOS?
Which ECG 12 leads correspond to ECG R and ECG L in MrOS Database?
Relevant information:
ECG Placement: Medtronic Medclear ECG snap electrodes. 2 leads place R subclavicle-L lower rib. Occasional modesty issues necessitated altering placement to right subclavicle-left suubclavicle. Position 3-5 cm below the middle of the right and left collar bones, in spaces between rib bones.
[White (-) electrode 3-5 cm.(2 finger breadths) below midpoint of right clavicle. Red (+) electrode is below the left ribcage