Diseases that affect valvular function

What are some diseases that affect valvular function, and how can they be diagnosed with imaging?

The aortic, pulmonic, mitral, and tricuspid valves can become stenotic, incompetent, or both. A chamber draining through a stenotic valve experiences a pressure load; if this chamber is a ventricle, it responds with muscular hypertrophy. If this chamber is an atrium, however, it responds with enlargement. A chamber draining through an incompetent (regurgitant) valve experiences a volume load ( Figure 12-6 ) and responds with enlargement (whether it is an atrium or a ventricle). Echocardiography and MRI can measure chamber size and velocity and direction of blood flow across a valve orifice, detecting and quantifying valvular disease.


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