The bruce protocol involves a treadmill execise in which you are wired to an ECG monitor.
I have done them numerous times for medical renewals. It involves a minimum of 8 minutes but they may go longer.
You start off at slow walking pace and there is a series of increases in pace and incline. They take you to the stage of heavy breathing and workload depending on your fitness. After you finish you sit down and they monitor your heartrate returns to normal in a normal fashion.
You need to book in with a Cardiologist. It can be done in their rooms either privately or in a hospital. This is to monitor you in case of problems. Purely precautionary. The cardiologist provides a report for your DAME and CASA.
Check out the CASA medical handbook on their website. Also Google search Bruce Protocol for a detailed explanation of the timing and speed and incline parameters.
I did a practice run on a treadmill before my first one to gain an appreciation of what is involved.