see: [RV POCUS -- melbourneUS](https://www.melbourneus.com/rv-matters-on-echo/) see also: [[ECHO]], [[Right heart failure]] #incomplete ## RVSP estimate RVSP with #pocus using modified bernoulli equation > **RVSP** = 4V^2 + Right Atrial pressure > ↑ *modified Bernoulli equation* > > - *Velocity* (v) is measured by peak velocity of tricuspid regurg (TRmax) in m/s using continuous Doppler (not pulse wave) > - normal regurg jet < 2m/s > - ==\> 3m/s would correspond to pulm art pressure of at least 36 mmHg== (4 x 3^2) > - Right atrial pressure approximated by IVC measurement (see below) > > 21 mmHg - normal RVSP > 44 mmHg - mod RVSP > 70 mmHg - severe RVSP ![[image.png]] | IVC size | collapsibility | RA pressure | | -------- | -------------- | ----------- | | < 1.2 | | < 10 | | > 1.7 | >50% | 5 | | > 1.7 | >50% | 10 | | > 1.7 | no collapse | 20 | 5mmHg - normal RAP 5-10 - mod RAP 10-15 severe RAP ## TAPSE - measure in apical 4-chamber view - normal > 17mm (can use m-mode to measure this)