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.
Amazon has unveiled the Amazon Tap and Echo Dot, two new additions to the Alexa-enabled device family. The former is a $130 portable version of the Amazon Echo and works as a speaker for Bluetooth and Wi-Fi, while the latter is a $90 compact, voice-controlled device that can easily connect to your speaker.