Can't agree more, if she has a stroke in HK, then you are in big trouble without dangerous illness insurance. Fire her, pay her 1 month and a ticket. the agent should give you a second maid for free, no agent fee, I mean...but wait for 3 months.
Can complain to association for overseas maid... this is total irresponsibility, passed 2 health checks in 2 countries with blood pressure over 200? Even 140 is considered to high.