🧵On the physiology of the RVOT/PA Doppler. Simplified understandings. Corrections are welcome!😃
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Monitoring changes are likely more useful.
➡️AcT correlates with mPAP and PVR.
doi.org
➡️Vmax/AcT does not change after fluid bolus in fluid responsive patients doi.org
➡️Vmax/AcT is improved when PEEP = optimal respiratory compliance doi.org
Cyclic changes in right ventricular output impedance during mechanical ventilation | Journal of Applied Physiology
In a context such as acute respiratory distress syndrome, where optimum tidal volume and airway pres...
Influence of Superior Vena Caval Zone Condition on Cyclic Changes in Right Ventricular Outflow during Respiratory Support
Background. Adequate fluid resuscitation in critically ill patients undergoing mechanical ventilatio...
Positive end-expiratory pressure titration in acute... : Critical Care Medicine
of the respiratory system, to identify specific PEEPs (PEEPS and PEEPA) whose impact on right ventri...
➡️For details on waveforms & physiology➡️doi.org
➡️DT is a potential quantitative metric of wave reflections doi.org
Shape of the Right Ventricular Doppler Envelope Predicts Hemodynamics and Right Heart Function in Pulmonary Hypertension
Rationale: Systolic deceleration or “notching” of the right ventricular outflow tract Doppler flow v...
Unraveling the RV Ejection Doppler Envelope: Insight Into Pulmonary Artery Hemodynamics and Disease Severity
The purpose of this study was to characterize the profiles of right ventricular outflow tract (RVOT)...
➡️PET is increased in PHT, likely due to RV-PA uncoupling doi.org
➡️PET correlates well with RVFAC doi.org
➡️PET increases during mechanical inspiration doi.org
Right ventricular outflow tract spectral signal: a useful marker of right ventricular systolic performance and pulmonary hypertension severity
AbstractAims. Right ventricular outflow tract (RVOT) acceleration shortens with chronic pulmonary hy...
Doppler evaluation of right ventricular outflow impedance during positive-pressure ventilation
Positive-pressure ventilation has often been advocated to increase oxygen delivery. This ventilation...
Alterations of right ventricular systolic time intervals by chronic pressure and volume overloading.
Right ventricular (RV) systolic time intervals and hemodynamic parameters were determined by microma...
➡️ET is decreased in PHT doi.org
➡️ET does not ⬆️after fluids, but decreases during inspiration in fluid responsive patients. doi.org
Influence of Superior Vena Caval Zone Condition on Cyclic Changes in Right Ventricular Outflow during Respiratory Support
Background. Adequate fluid resuscitation in critically ill patients undergoing mechanical ventilatio...
A critical review of the systolic time intervals.
The theoretical basis for the use of the systolic time intervals has been largely established. The m...
Alterations of right ventricular systolic time intervals by chronic pressure and volume overloading.
Right ventricular (RV) systolic time intervals and hemodynamic parameters were determined by microma...
➡️(PET+ET) is correlated with RVFAC; better than PET alone doi.org
➡️(PET+ET) is also increased for RV volume overloaded ASD patients doi.org
Right ventricular outflow tract spectral signal: a useful marker of right ventricular systolic performance and pulmonary hypertension severity
AbstractAims. Right ventricular outflow tract (RVOT) acceleration shortens with chronic pulmonary hy...
A critical review of the systolic time intervals.
The theoretical basis for the use of the systolic time intervals has been largely established. The m...
Assessment of the pulmonary vascular bed by echocardiographic right ventricular systolic time intervals.
Echocardiography was used to measure right ventricular systolic time intervals (RVSTI) in 85 normal...
➡️PET/ET-ratio increases during increased RV afterload from inspiration doi.org
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