MIT-LCP / MIT-LCP/physionet

GainQRSdetect hardcoded to 2000 leading to errors

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Dominant language
Python
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Description

Hi,

ConvertRawDataToRRIntervals seemed to not process some files and I finally found that it was because of the line 48 that hardcode amplifies the signal by 2000 before the signal is processed by wqrsm_fast where the gain default is 200 (line 80: WFDB_DEFGAIN = 200.0). When I remove the gain of 2000 in ConvertRawDataToRRIntervals, I don't get the error.

Is there a strong reason why I should keep the hardcoding for the gain of 2000 in ConvertRawDataToRRIntervals or is it an error?

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Research direction

Start with ConvertRawDataToRRIntervals at the reported line 48 and compare its hardcoded gain of 2000 with wqrsm_fast and WFDB_DEFGAIN at line 80. Reproduce the files that fail, determine which gain is expected for the input signal, and confirm that RR-interval conversion completes without errors.

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Assessment

Tech stack
python
Domain
data
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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