Venous Pressure. Venous Pressure. Venous Pressure generally refers to the average pressure within venous compartment of circulation Blood from all the systemic veins flows into the right atrium of the heart, therefore the pressure in the Rt atrium called Central Venous pressure.
Venous Pressure generally refers to the average pressure within venous compartment of circulation
Blood from all the systemic veins flows into the right atrium of the heart, therefore the pressure in the Rt atrium called Central Venous pressure
There is no valves between the Rt atrium and the Internal Jugular Vein . So the degree of distension of this vein is dictated by the Rt atrium pressure.
Pressure changes transmitted from right atrium
The right internal jugular is the best neck vein to inspect
Provides information about hemodynamic changes in right atrium & ventricle
A a positive wave due to atrial contraction.
C a positive deflection due closure of tricuspid
Xa negative deflection due to atrial relaxation
V a positive deflection due to filling of the right atrium against the closed tricuspid valve during ventricular contraction (venous return)
Y a negative deflection due to emptying of the right atrium upon ventricular relaxation
Prominent ‘a’ wave :
Right atrial and right ventricular hypertrophy (due to P.HTN or P.stenosis)
Large ‘a’ wave produce when Rt atrium contract against closed tricuspid valve. This seen in complete heart block
A paradoxical rise of JVP on inspiration. Causes:
Sever Rt ventricular failure
Change in posture ?
Change in respiration ?
Pulsation pattern ?
Position 45 degree
Rest the pt head on pillow to ensure neck muscle relax, and slightly tilted toward the left side.
look acorss the neck from the Rt side of the pt.
Identify the Jugular vein
Confirm the pulse.
Identify the upper limit of venous pulsation
JVP is measured by two pencils method
Place one pencil at sternal angle vertical to ground & other pencil at upper limit of venous pulsation horizontal to the ground
Measure length of the verticbal pencil in cm btw the sternal angle & where it is crossed by the horizontal pencil.
Normal JVP up to 3 cm
JVP + 5 cm = CVP
Right heart failure
Superior vena cava obstruction
Tricuspid valve disease
increased jugular venous pressure
diminished heart sounds