That chart comes from the blog of a young English researcher, Chris Snowdon. As you can see, following smoking bans in some cities the number of heart attacks went up. In others, little or no change. In some, a few, it dropped considerably: and those are the only ones that get reported.
Cherry picking your data this way is, as I’ve said, given the technical term “lying through your teeth”.
It’s worth having a look around Snowdon’s blog, you’ll be surprised at quite what you’ll find there.