Today we had a massive PE patient with McConnel sign. I explained the pathophysiology of McConnel sign on this👇 glove. It’s all physics. #CardioTwitter #Echo 
McConnell's sign is RV free wall akinesia/hypokinesia with preserved RV apical contraction in massive PE patients.
Here is the physics; the radius of RV inflow(palm of the glove) is much larger than the RV apical radius(thumb of the glove). According to Laplace law, wall tension increases with a larger radius.
So palm of the glove has more surface tension and stiffer than the fingers of the glove which have less radius and less surface tension. RV apex continues to contract during massive PE because has less surface tension than RV inflow/lateral wall. All physics, all Laplace Law
• • •
Missing some Tweet in this thread? You can try to
force a refresh
