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.
As a result, the Echo has quickly become one of Amazonâs best-selling products, even more popular than its Kindle line of e-readers. If the original Echo was Amazonâs Trojan Horse to get into your home, the new Echo Dot is Amazonâs army coming in behind it. Itâs smaller and half the price ($89.99 vs. $179.99), yet has all of the same far-field voice recognition technology and voice control capabilities as the larger Echo. You donât need a full-size Echo to use the Dot â it is a fully standalone device.