Final answer:
The symptoms and MRI findings suggest that the client is experiencing a left-sided cerebrovascular accident (CVA) or stroke, not a transient ischemic attack (TIA) or a right-sided CVA.
Step-by-step explanation:
The symptoms including weakness, expressive aphasia, and right hemianopia, along with the MRI showing an infarct, are indicative of a left-sided cerebrovascular accident (CVA) or stroke. The left side of the brain controls language and the right side of the body, which is consistent with the presented symptoms. It is not a transient ischemic attack (TIA) since the brain MRI reveals an infarct, indicating that the brain tissue has experienced damage, which would suggest the effects are lasting beyond 24 hours and not temporary. A right-sided CVA would not typically cause expressive aphasia because language functions are generally located in the left hemisphere of the brain for most individuals. A 'Completed Stroke' is a term that could indicate the stroke has reached its maximum extent of damage, but in this context, it is more appropriate to specify it as a left-sided CVA since there's clear evidence of permanent damage to the brain tissue rather than suggesting resolution or incompleteness.