I just finished the class with an A. I found actively reading using different colored highlighters worked well for me. I'd put general info in yellow, patho reasons in pink, clinical manifestations in orange and treatments in green. If there was a complication leading to death it would get fushia. I also circled in pen any 'unknown' cause....you'd be surprise how many of those there actually are.
I also found doing mind maps helped me a lot, but the time they took was too much (5 hours per chapter w/ 47 chapters) so I stopped doing that. 'Luckily' my class had research papers due for each unit which were weighted the same as exams, so my high marks with my papers would lift up my not so good exams marks.
Good luck with the class. There is TONS of information, but it was a very interesting course.