Jugular Venous Pressure It’s easier than it looks © Continuing Medical Implementation …...bridging the care gap JVP Summary • • • • • It’s easier than it looks !!! Just never taught properly Look for descents not waves Time deepest descent with systole This is the x' (prime) descent !!! – Occurs during systole due to RV contraction pulling down the TV valve ring “descent of the base” – A measure of RV contractility – If the dominant descent is systolic-this is the x' descentand JVP waveform is normal © Continuing Medical Implementation …...bridging the care gap JVP Inspection © Continuing Medical Implementation …...bridging the care gap Jugular venous pressure • Level of sternal angle is about 5 cm above the level of mid right atrium IN ANY POSITION. • JVP is measured in ANY position in which top of the column is seen easily. • Usually JVP is less than 8 cm water < 3 cm column above level of sternal angle. © Continuing Medical Implementation …...bridging the care gap © Continuing Medical Implementation …...bridging the care gap Normal JVP Waveform • Consists of 3 positive waves – a,c & v • And 3 descents – x, x'(x prime) and y © Continuing Medical Implementation …...bridging the care gap Normal JVP Waveform • a wave - atrial systole • x' (prime) descent !!! – occurs during systole due • x descent – onset of to RV contraction pulling down the TV valve ring atrial relaxation “descent of the base” • c wave - small – a measure of RV contractility positive notch in the 'x' descent due to bulging • v wave - after the x' descent - slow positive of the AV ring into the wave due to right atrial atria in ventricular filling from venous return contraction. • y descent - rapid emptying of the RA into RV due to TV opening © Continuing Medical Implementation …...bridging the care gap JVP Inspection • Look at the JVP and simultaneously feel the carotid or auscultate to identify systole • Say “systole”, “systole”, “systole”, “down”, “down”, “down”, X', X', X' and look for systolic descent • Descents are easier to see due to greater amplitude and frequency © Continuing Medical Implementation …...bridging the care gap Identifying the Waveform • If the dominant descent is systolic-this is the x' descent-and JVP waveform is normal • The a wave is inferred as the positive wave before the dominant descent • The y descent is sometimes seen but is not as deep as x' descent © Continuing Medical Implementation • The c wave never seen • The y descent sometimes seen – Diastolic descent – Shallower than X' • The v wave is inferred as the positive wave between x' and y • The x descent rarely seen – visible in 1o heart block …...bridging the care gap JVP- HJR & Kussmaul’s sign • Hepato-jugular reflux (various definitions) – sustained rise 1 cm for 30 sec. – venous tone & SVR – RV compliance • Positive HJR correlates with LVEDP > 15 © Continuing Medical Implementation • JVP normally falls with inspiration • Kussmaul’s sign – – – – inspiratory in JVP constriction rarely tamponade RV infarction …...bridging the care gap Specific JVP patterns Condition Pattern Normal waveform X' deeper than Y Post CABG X' shallower, now = Y Atrial fibrillation CV wave Tricuspid regurgitation CV wave Complete heart block Irregular cannon A waves Tamponade JVP brisk X' > Y Constriction JVP brisk X' & Y descents X' less exaggerated than Y RV infarction © Continuing Medical Implementation JVP –low amplitude …...bridging the care gap Pulsus Paradoxus • Venous return normally increases with inspiration • Despite this, BP normally decreases by up to 8 mm Hg on inspiration • This paradoxical response is due to: – Increased pulmonary capacitance – Increased negative intra-thoracic pressure with inspiration and – The phase lag between right and left sided events © Continuing Medical Implementation …...bridging the care gap How to measure Pulsus Paradoxus • Pulsus paradoxus is an exaggerated inspiratory fall in BP – Ask the subject to breath normally – Auscultate Korotkoff’s sounds as the BP cuff is slowly lowered. Time respiration simultaneously – Mark when BP sounds are heard only in expiration – Mark when BP sounds are heard both in expiration & inspiration. Korotkoff’s sounds seem to double at this point. – The difference is the measured pulsus paradoxus © Continuing Medical Implementation …...bridging the care gap Pulsus Paradoxus An exaggerated drop in SBP (>10mmHg) with inspiration © Continuing Medical Implementation …...bridging the care gap Tamponade versus Constriction • Tamponade – in tamponade, filling is restricted throughout diastole • Constriction – in constrictive pericarditis, filling is truncated in early to mid diastole • Kussmaul’s Sign – in constriction, venous return increases with inspiration and a high right atrial pressure resists filling resulting in an increased JVP © Continuing Medical Implementation …...bridging the care gap Pulsus Paradoxus Tamponade without pulsus – – – – – atrial septal defect severe aortic stenosis aortic insufficiency LVH with LVEDP left ventricular dysfunction – decreased intravascular volume (low-pressure tamponade) © Continuing Medical Implementation Pulsus without tamponade – – – – COPD RV infarct pulmonary embolism effusive constrictive pericarditis – restrictive cardiomyopathy – extreme obesity – tense ascites …...bridging the care gap Central Venous Pressure Cardiac Tamponade Constrictive Pericarditis presence of a rapid Y-descent argues against cardiac tamponade © Continuing Medical Implementation …...bridging the care gap Constrictive Physiology Hemodynamics • End-diastolic pressures – elevated and equalized (<5 mm Hg difference) • RA pressure tracing – rapid X- and Y-descent, “W” or “M” pattern – failure to decrease with inspiration (Kussmaul’s sign) • RV pressure – RVEDP > 1/3 of RVSP – dip and plateau configuration of RVDP (square root sign) • LV and RV pressures – discordant changes © Continuing Medical Implementation …...bridging the care gap Phono-echocardiography Pericardial Knock (early diastolic sound) Venous Pulse (X- and Y-descend) © Continuing Medical Implementation M-Mode Echo (thickened pericardium) …...bridging the care gap Validity of the Hepato-jugular Reflux as a Clinical Test for Congestive Heart Failure John Ducas MD, Sheldon Magder MD, Maurice McGregor MD (Am J Cardiol 1983;52:1299-1303) © Continuing Medical Implementation …...bridging the care gap Normal JVP • Normal JVP < SA at 45o • Visible when exceeds 7 cm above reference point in RA = 5 cm < SA • Visible to height 20 cm > SA (25 cm > reference point) • Correlate with CVP 5-19 mm Hg © Continuing Medical Implementation …...bridging the care gap Methods: • 25 patients studied – 6 with normal resting LV function – 16 with potential bi-ventricular dysfunction – 3 with RV dysfunction • Abdominal pressure 35mm Hg applied with rolled up manometer • Patient instructed to breath normally • JVP estimated 12 seconds after compression • Hemodynamics, esophageal and gastric pressure recordings obtained simultaneously © Continuing Medical Implementation …...bridging the care gap Validity of the HJR as a Clinical Test for CHF • In patients with normal LV function abdominal compression did not increase > 2 mm Hg (2.7 cm H2O ) • In 16/19 patients with impaired ventricular function CVP increased by > 3 mm Hg (4 cm H2O) • CVP stabilized over 12 seconds and did not change over subsequent 60 seconds • An increase of 3 cm H2O (2.2 mm Hg) in the height of the neck veins is a reasonable upper limit of normal for HJR John Ducas MD,Medical Sheldon Magder MD, Maurice McGregor MD © Continuing Implementation (Am J Cardiol 1983;52:1299-1303) …...bridging the care gap The Abdominojugular Test: Technique and Hemodynamic Correlates Gordon A. Ewy MD (Annals Int Med 1988;109:456-460) © Continuing Medical Implementation …...bridging the care gap Results: • PCW mean 10.5 +/- 1 mm Hg in patients with negative HJR • PCW mean 19 +/- 3 mm Hg in patients with positive HJR • Positive HJR correlated with PCW > 15 mm Hg © Continuing Medical Implementation …...bridging the care gap