Apical four chamber view of echocardiogram showing Atrial Septal Aneurysm bowing into left and right atria like a swing. As its movement is bi directional, its type 5.
Classification of Inter atrial Aneurysm:
type 1R: bulging is in the right atrium only
type 2L: bulging is in the left atrium only
type 3RL: major excursion bulges to the right atrium and the lesser excursion bulges toward the left
type 4LR: maximal excursion of the atrial septal aneurysm is toward the left atrium with a lesser excursion toward the right atrium
type 5: atrial septal aneurysm movement is bidirectional and equidistant to both atria during the cardiorespiratory cycle.
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