'V' Wave in JVP is due to-
Right atrial contraction
Right atrial relaxation
Closure of tricuspid valve
Isovolumetric relaxation
Ans. is 'c' i.e., Closure of tricuspid valveJugular venous pressure (JVP)* The variations in right atrial pressure are transmitted to the jugular veins, producing three positive waves (a, c and v) and two negative waves/descents (x and y).1) a-wave : It is presystolic 'positive' wave due to right atrial contraction (right atrial systole).2) x-descent: It a 'negative' wave due to right atrial relaxation.3) c-wave: This 'positive' wave is produced by bulging of tricuspid valve into right atrium during isovolumetric contration of right ventricle.4) v-wave: It 'positive' systolic wave resulting from increase in blood volume in vena cava during systole, when tricuspid valve is closed.5) y-descent (diatolic collapse): This 'negative' wave is due to tricuspid valve opening and rapid inflow ofbood into right ventricle.
Heart, Circulation, and Blood