'c' wave of JVP
Occurs during rapid filling phase of cardiac cycle
Occurs due to opening of tricuspid valve
Occurs due to closure of tricuspid valve into right atrium
Occurs at the end of T wave
c' wave of JVP

Occurs due to bulging of tricuspid valve into right atrium
Occurs during isovolumetric contraction phase
In tricuspid regurgitation, v wave merge with c wave.