Immigrant doctors that come to Canada, no matter where they got their degrees, are considered to be the 'best and brightest' if they are recruited as doctors. Immediately your application will be a red flag: a Canadian who chose to study medicine not simply out of Canada (a US or UK medical degree would not raise these flags... but in Russia... in the current geopolitical climate). Any hiring committee would very rightly ask themselves "why did this person go attend a Russian med school, rather than one at home?" and then "is it that s/he was unable to meet the entrance requirements for one of our schools?". Even if you end up being the top student in your cohort in Russia these questions will plague you. Maybe it isn't fair but these will be detriments.

In addition, you need to find out which tests you might need to take afterwards to allow you to practice medicine in Canada with a Russian medical degree. Certain provinces have recruited heavily from certain countries because they are familiar with the training that doctors receive in those areas. Historically, at least in the west, doctors with training from other countries who were emigrating to Canada worked in rural settings for a number of years where there was increased demand for doctors. After they had done the required number of years, the typical pattern was for doctors to leave and go to urban centres and rural communities to get new doctors emigrating to Canada. There were incentives for doctors to do this, in addition to housing within the communities that was often provided free of cost, some Canadian exams could be skipped in lieu of service. But these regions of Canada have not typically recruited from Russia and are unlikely to be familiar with the Russian system. This doesn't mean that they would be unwilling to take someone with a Russian degree, it means that they will know less about your training. In addition, on your end, you might be unwilling to move to a rural setting, especially if all of your family is in another part of the country. [knowledge gained from parents and grandparents on hospital board].

Also, be prepared to accept that there is not a doctor's shortage in Canada, unless you are willing to re-locate to a location such as the one I outlined: and even then you would have obstacles to overcome: http://www.huffingtonpost.ca/2012/11/15/doctors-canada-report-women-rural_n_2139210.html