Monday, October 8, 2018

CVP waveform

Q: Which of the following statement is false regarding "Central Venous Pressure" (CVP)? 

 A) a wave is due to the increased atrial pressure during right atrial contraction.
B) c wave is due to a slight elevation of the mitral valve during early ventricular contraction.

C) x descent is caused by the downward movement of the right ventricle during systole.

D) v wave arises when the blood fills up the right atrium against a closed tricuspid valve.  

E) y descent is produced by the tricuspid valve opening in the diastole. 

Answer: B

CVP is directly produced due to the cardiac function on the right side of the heart.

B is a wrong answer as the mitral valve has no direct contribution to the CVP wave, despite CVP is a good measurement of left ventricular function. Mitral valve lies on the left side between the left atrium and left ventricle. Instead, it's a tricuspid valve slight elevation during early ventricular systole which produces c wave.

CVP is consist of 3 waves (a, c and v) and 2 descents (x and y)

All other choices are correct!



Drazner MH, Rame JE, Dries DL. Third heart sound and elevated jugular venous pressure as markers of the subsequent development of heart failure in patients with asymptomatic left ventricular dysfunction. Am J Med 2003; 114:431.

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