Please help - Cardiac + Neuro case.

My Father is 60 years old. For over a month now he is partially unconscious, he is been experiencing this Post CABG and Post AVR after 19-May-2014. Doctors have informed that due to high amount of calcification on the Aortic valve during Valve replacement small plaques would have showered to the brain and hence this has caused the brain to not to function as normal. Cardiac doctors have referred to Neurologists and they have recommended for MRI Scan and it was done 21-May-2014 and 24-May-2014. Here are the details from the MRI reports.
Doctors currently are saying that it will take more than 6months for my father to recover. At this point of time he is partially opening eyes on his will. When we call him intermittently he opens eyes. Along with this he is having both the leg movements in the bed and left hand movements. Right hand reflections and movements are very slow. Kindly help me with any suggestion in this case and if anyone of you has come across any such cases please share your experience and process of treatment that was done. And if so, how much time did it take for those patients to completely recover.

DIFFUSION IMAGING:

TECHNIQUE:
DWI Axials.
SE T1 Axials.
FSE T2 Axials.
FLAIR Axials.
GRE Axials.
3D TOF for MR Angiography of intracranial arterial system.

FINDINGS:
Known case of CAD, post CABG status on 15/5/2014.

Ventricular system is normal.

Multiple punctate and patchy T2/FLAIR hyperintensities noted involving the bilateral caudate and putamen, thalami, bilateral cerebellar hemispheres, cortex and subcortical white matter of bilateral cerebral hemispheres. These lesions are hypointense on T1W images and show diffusion restriction.

Multiple foci of blooming noted in bilateral cerebral and cerebellar hemispheres on susceptibility weighed images.

Rest of the cerebral parenchyma shows normal signal characteristics.

Extracerebral CSF spaces are normal.

No evidence of extra axial fluid collections.

Rest of the brainstem and cerebellar hemispheres are normal

CP angles and internal auditory canals are normal.

MR Angiography of intracranial arterial system reveals normal calibre and flow in all the intracranial branches of anterior and posterior circulation. No evidence of focal stenotic / occlusive pathology.

Multiple subacute embolic infarcts in supra and infra tentorial compartments as described above.

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MRI BRAIN:

TECHNIQUE:
DWI Axials.
SE T1 Axials.
FSE T2 Axials.
FLAIR Axials.
GRE Axials.
2D TOF / 3D PF For MR Venography of intracranial venous system.
3D TOF for MR Angiography of intracranial arterial system.

FINDINGS:
Known case of CAD, post CABG and post AVR status on 15/5/2014.

Ventricular system is normal.

Multiple punctate and patchy T2/FLAIR hyperintensities noted involving the bilateral caudate and putamen, thalami, bilateral cerebellar hemispheres, cortex and subcortical white matter of bilateral cerebral hemispheres. These lesions are hypointense on T1W images and show diffusion restriction.

Multiple foci of blooming noted in bilateral cerebral and cerebellar hemispheres on susceptibility weighed images.

Mild swelling / thickening of cortices of both frontal lobes.

Rest of the cerebral parenchyma shows normal signal characteristics.

Extracerebral CSF spaces are normal.

No evidence of extra axial fluid collections.

Rest of the brainstem and cerebellar hemispheres are normal

CP angles and internal auditory canals are normal.

MR Venogram of the intracranial arterial system reveals normal calibre and flow in the superior sagittal, transverse and sigmoid sinuses on both sides. Deep venous system shows normal flow.

MR Angiography of intracranial arterial system reveals normal calibre and flow in all the intracranial branches of anterior and posterior circulation. No evidence of focal stenotic / occlusive pathology.

Multiple subacute embolic infarcts in supra and infra tentorial compartments as described above.

Current medicines that are used:
TAB.AUGUMENTIN 625MG TID
TAB. STORCIT 5OOMG BD
TAB. NOOTROPHIL 1200MG TID
TAB. WARF 3MG OD
TAB. BETALC 25MG BD
TAB. AMLODEPIN 5MG
TAB. ROLES 20MG
TAB. FRUSELAC
TAB.BEPLEXFORTE
TAB.SPORLAC
TAB. ECOSPRIN 150MG
SYP. MUCAINEGEL 10ML