The ECG shows atrial fibrillation (AF)- this is common in older patients and may be not cause any symptoms. However AF is associated with an increased risk of stroke/ thromboembolism- it is likely that this was the cause for the patient’s previous mini-stroke.
Echocardiogram- to cardiac size and function and look for any valvular heart disease
24 hour Holter monitor- assess AF rate over a longer period of time
Blood tests- check renal function, thyroid function and full blood count