Pressure Jugular vein

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the jugular venous pressure (jv) indirectly observed pressure on venous system. can useful in differentiation of different forms of heart , lung disease.



the jugular venous pressure waveform


in jugular veins pressure waveform, upward deflections correspond (a) atrial contraction, (c) ventricular contraction (and resulting bulging of perspicuous right atrium during isovolumic systole), , (v) atrial venous filling. downward deflections correspond (x) atrium relaxing (and perspicuous valve moving downward) , (y) filling of ventricle after tricuspid opens.


the peak caused contraction of right atrium.

the av minimum due relaxation of right atrium , closure of tricuspid valve.

the c peak reflects pressure rise in right ventricle during systole , resultant bulging of tricuspid valve—which has closed—into right atrium.

the x minimum occurs ventricle contracts , shortens during ejection phase, later in systole. shortening heart—with tricuspid valve still closed—pulls on valve opens, v peak begins wane.

the y minimum reflects fall in right atrial pressure during rapid ventricular filling, blood leaves right atrium through open tricuspid valve , enters right ventricle. increase in venous pressure after y minimum occurs venous return continues in face of reduced ventricular filling.







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