The Philips PageWriter TC50 cardiograph can run and store 15 minutes at a time of resting ECG data. The Philips PageWriter TC70 series cardiograph can store up to 20 minutes of resting ECG data at a time. Under the scenario spelled out in the article (see link below), the doctors could have hooked up the cardiograph to the patient Sue Palmer and let it start recording. Then a physician could come back and scroll through the 12-lead recording to see what changes were taking place over that time.
Cardiac Events can then be documented by taking a snapshot print or saving of the resting 12-lead ECG in an electronic format to be sent to an ECG Management system like Philips Intellispace ECG or any other reading system or EMR/HIS.
READ: Washington Post Article (3/7/16) – She thought it was only a 24-hour bug. What she really had almost killed her