A 35year old
male presents with sudden onset of loss of vision in his right visual
field whilst reading. He has no significant medical history and
he neither smokes nor uses alcohol or illicit drugs. Physical
examination reveals a right homonymous hemianopia but no other
abnormalities. Blood pressure is normal and cardiovascular examination does
not reveal any abnormality. Magnetic resonance imaging reveals acute
left occipital infarction and normal head and neck vessels.
haematology and biochemistry are normal, there is no increase in inflammatory
markers and biochemistry including lipid profiles are within the normal range.
In this patient
which of the following would you arrange next to determine the underlying
cause of the patientís condition?
Contrast (bubble) echocardiography