Ok, sounds good.

RESOLVED

Good point,
I agree with the two intervals, it would be clarifying.
For the counter, though, it might not be always the case.
I will start doing it in my next task, since I would like to change all, to be consistent across the entire code base.

Only a suggestion:
It is a good idea to append the unit to the end of the variable name especially for time. It helps improve readability and clarity.

For instance, here, we have ms and the next one, _pendingInterval is in seconds. and I believe _pendingCounter is in minutes based on the .cpp file's comment.

_interval_ms
_pendingInterval_sec
_pendingCounter_min

RESOLVED

Thanks for the feedback.
Fixed.

The variable, destination, itself is a QString, you don't need to do QString("%1").arg(destination), you can pass destination in directly.

RESOLVED in CODE WALKTHROUGH.

removed spaces.

to align arterial(8 characters) and venous(6 characters) vertically, and to make it easier to compare the variables, to avoid missing a parameter.

Why is there 2 spaces between . and field name?