APPROACH 2D DOPPLER AND COLOR FLOW REGURGITATION OBSTRUCTION TEE
2D DEHISENCE VEGETATION THROMBUS/PANNUS DEGNERATION OF TISSUE DIFFICULTIES: ECHO REVERBERATIONS
TYPES OF PROSTHETIC VALVES
2D GOALS
M MODE
DOPPLER GOALS
ABNORMAL STRUCTURES
PRIMARY GOAL OF DOPPLER
DOPPLER ASSESMENT
DOPPLER Flow velocity across prosthetic valve Pressure gradient using bernolius eqaution 4V2 Continuity eqa : to find EOA PHT Prosthetic has mild gradient compared with native valve( location,type,size , various degree) Baseline echo after post operative to followup echo for reference
High velocity and PHT Regurgitation and obstruction has high velocity PHT is prolonged for Obstruction. Where pht normal in regurgitation in mitral and tricuspid prosthetic, forward flow is decreased.
PHT Pressure half-time (PHT) is defined as the time required for the pressure gradient to decrease to half of its maximal value, and is an index of stenosis severity.Â
Uses of PHT MITRAL PHT OBSTRUCTION : INCREASE REGURGITATION: NORMAL OR DECREASE