<prompt> Pulsus bisiferiens is seen in all exceptAoic regurgitation aoic stenosisAoic regurgitationHyperophic cardiomyopathyTetrology of hea  <response>: Ref Harrison 19 th ed pg 1526 Pulsus bisferiens, also known as biphasic pulse, is an aoic waveform with two peaks per cardiac cycle, a small one followed by a strong and broad one. It is a sign of problems with the aoic valve, including aoic stenosis and aoic regurgitation, as well as hyperophic cardiomyopathy causing subaoic stenosis. 