In aortic stenosis, the carotid impulse is classically "parvus and tardus" -- or decreased in volume and upstroke. The degree of carotid upstroke delay reflects the severity of the aortic stenosis ...

Note the double systolic sound associated with the double summit of the pulsus bisferiens in this case of severe aortic stenosis ... indirect tracings of the carotid or brachial pulse wave ...