Don't get confused Marchie
This line only appears after medicals are cleared first by New Delhi (regional Office), if you are a Pakistani applicant and then final approval is given by the Medical Board of Ottawa (precisely Surgeon General.
I have my GCMS just recently, which says medicals are passed. So this line only appears when you passed the medicals.
"medicals received" does not have literal meanings but it denotes that Medical after successful clearance have been received at the visa office.