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.
And even if you do buy several Dot speakers, you can't network them, so this isn't Amazon's attempt to replicate a Sonos-like experience (at least, not yet). The main idea is that the Echo Dot that it will bring Amazon's voice assistant, Alexa, to many other devices throughout the home.