apoplectic

Now this is a word I like! The Dictionary.com definition is more technical, but Merriam-Webster's captures the modern usage very succinctly:

apoplectic

1: of, relating to, or causing stroke
2: affected with, inclined to, or showing symptoms of stroke
3: of a kind to cause or apparently cause stroke (an apoplectic rage); also : greatly excited or angered (was apoplectic over the news)