Pressed on Professor Channer's findings that the ECG chart was inconsistent with a heart attack, Dr Patel said Mr Tomlinson may have died from "hypoxia mixed with acidosis" – his body had been deprived of adequate oxygen.
As well as providing a heart rate reading in numerical form, it gives the ECG trace (which charts the electrical activity of the heart over time and flags up potential anomalies) and measures skin surface temperature.
For ECG data editing, the ECG signal was exported to Chart software (Chart 5.0, AD Instruments, Germany) as a text file as previously described (Gaburro et al., 2011).
The case notes included surgical pre-operative assessment, including details of known co-morbid disease and smoking status, anaesthetic assessment, including cardiovascular evaluation and ECG interpretation, nursing notes and drug prescription charts.
A lead II electrocardiogram (ECG) was recorded on a computer by Chart V3.5 program.
During the follow-up, participants were diagnosed with AF if AF or atrial flutter was present on an ECG that was obtained from hospital or physician chart or from a routine clinic examination in our clinic (i.e., a 12-lead ECG was performed yearly in all participants.
When the animals had stabilized, measurements were taken at 2000 samples/s using lab chart version 7/8 pro (AD Instruments) to record ECG and BP pulse waveforms.
Oxygen consumption in immobilized bears was checked on a subsample of animals with an open flow respirometry system during blood sampling just prior to euthanasia via a tracheal tube, and ECG was recorded for at least 40s on a chart recorder or recorded at 400 Hz sampling frequency with data acquisition system (LabGraph with Scientific Solutions LAbmaster TM40-PGL board).
Cases with ECG recordings were prospectively identified and had identity confirmed by querying ED charts and records.
We also excluded patients whose charts were incomplete with respect to location of arrest, initial ECG, cause of cardiac arrest or initial post-resuscitation outcome.
