&;V' wave in JVP is due to: (A) Atrial contraction, (B) Mitral valve closure, (C) Atrial relaxation, (D) Tricuspid valve closure
Answer is D. The V wave mirrors the rise in atrial pressure before the tricuspid valve opens during diastole.Ref: Ganong&;s Review of medical physiology, 25th edition.Pg no. 542