Primary vs secondary valve disease - what's the difference?

In echocardiography, we often talk about "primary" or "secondary" disease. In this video, I explain what this terminology means, using mitral regurgitation as an example.

[@oktayyungul9916]

AMAZİNG WORK. CAN U SEND OPTIMIZING PDA WİEWS?

[@veterinaryechocardiography]

Thank you, Oktay, and thanks for the suggestion. Do you come across PDAs quite often?