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.
3 Things to Know About Amazonâs New Echo. The Echo Dot is a miniature Echo and the Amazon Tap is a new portable Bluetooth speaker. As the Amazon Echo smart speaker is establishing itself as a surprise hit, Amazon is adding two new similar devices to its hardware lineup. The Seattle, Wash.