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.
Thereâs only one way to buy the Echo Dot, on the other hand, and thatâs from your Echo. (âAlexa, order Echo Dotâ is the magic phrase.) The Dot is sort of a companion for the Echo, kind of, but not necessarily. Itâs just a smaller Echo, with a tiny (and bad) speaker. It still plugs into the wall, still does far-field voice recognition, itâs still named Alexa.