acute accumulation of as little as 50cc can result in hemodynamic
tamponade, which is a clinical diagnosis. The echocardiographic
findings can only help you decide how aggressive to treat a given
patient (IVF versus paricerdiocentesis if there is a safe approach)

Tamponade = diastolic atrial collapse (this video). You may also see
sistólic RV collapse but it´s in the diastolic cicle when you
diagnose tamponade. This could be hemodinamically significant
(=paradox pulsus) but easily reversible with saline expantion.

There appears to be RV/RA diastolic collapse, although when I try to
pause the video during the clip the "play arrow" is directly over the
RV/RA, agree this is has the likley potential to be hemodynamically
considered Tamponade.

I thought the heart still had to be surrounded in fluid to be called
tamponade? I guess another indication would be weather or not the
patient appeared to be in distress. I've been scanning a year and
still learning. :0)

Yes I think its a tamponade and the amonunt of the effusion is not
necesary be large