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 this is where the Evo comes into play. (Such a long-winded introduction!) Evo is a portable battery pack for the Echo Dot that has the same round shape, magnets to hold it to the Dot, LEDs to indicate battery level, and a minimalist MicroUSB plug that doesn't dangle and goes right into the Dot.