Your brain senses trouble and tells your body to release adrenaline-like substances into the bloodstream the so-called fight-or-flight reflex which increases blood pressure, thus the link to sleep apnea and high blood pressure.
Because of an interruption in the usual link between the wage pressure that comes with very low unemployment and the resulting upward pressure on prices.
You can also see an interview with Ann and Nancy Wilson, discussing their pressure-packed performance here ( Video Link ). (Courtesy of Artisan News Service and YouTube).
Yet the analogy with Argentina might have been closer still had Italy retained the lira, and thus been subject to the same sort of speculative pressure that eventually broke Argentina's link to the dollar.
Labour see the Lib Dems as the weak link in the coalition and they will be applying as much pressure as possible to Nick Clegg's party by suggesting that the 'new politics' of partnership should not mean saying one thing in opposition and doing another in government.
The pressure put on constituency Labour party delegates not to support the motion seeking to restore the link between pensions and earnings was similarly attacked.
If you're looking for more technical details you'll find a link to the recently published paper titled, Dexterous manipulation of microparticles using Bessel-function acoustic pressure fields at the source.