Aortic insufficiency causes both volume overload (elevated preload) and pressure overload (elevated afterload due to increased stroke volume) of the heart. The volume overload (due to elevated pulse pressure and the systemic effects of neuroendocrine hormones) causes left ventricular hypertrophy (LVH).
Echo Dot is a hands-free, voice-controlled device that uses the same far-field voice recognition as Amazon Echo. Dot has a small built-in speakerâit can also connect to your speakers over Bluetooth or with the included audio cable.
Samuel Gibbs. Monday 28 November 2016 02.00 EST Last modified on Tuesday 21 February 2017 12.08 EST. The Amazon Echo Dot is essentially all the bits of an Amazon Echo that make it interesting, but without the speaker beneath it â and so it costs just one-third of the price. The Dot is one of three Alexa-enabled products from Amazon that puts the companyâs voice assistant front and centre.