Table 1.

Summary of the routine stroke investigations, cardiovascular investigations and MRI, magnetic resonance angiography

Investigation	Comment
Blood investigations—HbA1c, fasting lipid profile	Normal.
Carotid Doppler ultrasonography scan	No plaque formation was seen in the right and left carotid arteries, with normal flow velocities.
Two-dimensional transthoracic echocardiogram	Normal left ventricular systolic function with an estimated ejection fraction of 60%–65%, normal valvular function and type one diastolic dysfunction. There were no visible atheromas in the ascending aorta.
12-lead ECG	Normal sinus rhythm with no acute dynamic changes consistent with ischaemia or infarction.
24-hour Holter monitor	Normal sinus rhythm with no significant arrhythmias such as atrial fibrillation, ventricular tachycardia or advanced heart block.
MRI of the brain magnetic resonance angiography (MRA) of the brain	Left basal ganglia (lentiform nucleus) and left parietal cortical infarct, left middle cerebral artery territory infarction suggestive of an embolic aetiology. On the MRA sequence, normal calibre and contour of the internal carotid and basilar arteries with normal flow were demonstrated in the anterior cerebral, middle cerebral and posterior cerebral vessels.