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Optimize a candidate software algorithm using data collected with the Vivio system for use as an aid in the identification of heart sounds associated with severe aortic stenosis

Prospective, non-randomized, single-center study of adult subjects referred for echocardiography. Total of 200 enrolled subjects at 1 site

Enrolled subjects will undergo:

Vivio system data capture, standard of care transthoracic echocardiogram (TTE). Vivio analysis will not be available to non-Avicena personnel

Inclusion Criteria:

1. Adult subjects (21 years of age or older).
2. Referred for transthoracic echocardiography by physician/primary care provider/cardiologist.
3. Willing and able to participate in all study evaluations and allow access to medical testing and records.
4. Ability to understand and sign an informed consent or have a legally authorized representative to provide informed consent on behalf of the subject.

Exclusion Criteria:

1. Acute coronary syndrome, cardiogenic shock or the need for inotropic/mechanical circulatory support.
2. Need for bedside echocardiogram (inpatient).
3. Prosthetic device previously implanted at aortic valve position.
4. Inability to palpate carotid pulse
5. History of carotid sinus hypersensitivity (i.e. fainting in response to touching or positioning the neck).
6. History of significant carotid artery disease or treatment (surgery, stenting, > 50% stenosis in both left and right carotid artery).
7. Open skin lesions at target site of Vivio examination.

No masking required