Atrial fibrillation and a corresponding enlargement of the left atrium may cause an increase in size of the mitral valve annulus. With a sinus rhythm, the mitral annulus undergoes dynamic changes during the cardiac cycle. For example, at the end of diastole the annular area is smaller than at the end of systole.
To determine who can perform aquatic therapy, we must define what aquatic therapy is. First, notice that aquatic therapy is considered a therapeutic procedure, not a modality. There are many technical and practical distinctions between the practice of aquatic therapy and the application of therapeutic modalities.
An endless pool, sometimes referred to as a treadmill for swimmers, is a small swimming pool designed to provide aquatic exercise for those who do not own a large enough space for a full-size pool. From the moment it was invented in the 1980s, endless pools became popular in the market as an exercise tool for people who wanted to incorporate hydrotherapy into their recovery program.