Shape of the aerial pulse is influenced by:
C i.e. Aerial wall expansionThe blood forced into the aoa during systole not only moves the blood in the vessels forward but also sets up a pressure wave that travel along the aeries. The pressure wave expends the aerial wallQ as it travels, and expansion is palpable as the pulse.
Viscosity of blood
Velocity of blood
Aerial wall expansion
Cross sectional area of aery.