Neurology Flashcards
Recall some important initial investigations following a suspected TIA
BP
ECG
Carotid USS
Bloods to include cholesterol, lipids, glucose + clotting
What is the CHA2DS2VASc score used to estimate?
Risk of stroke in patients with atrial fibrillation
What scoring system predicts stroke risk following a TIA?
ABCD2
Recall the mainstay of immediate management for TIA, including some contraindications to this mainstay
Aspirin 300mg Contraindicated if: - >7 days since signs and symptoms - Bleeding disorder/ on anti-coagulation - Already on regular low-dose aspirin
Recall some cases in which you would admit someone following a TIA to investigate them further
>1 TIA ('crescendo' TIA) Severe carotid strenosis Suspected cardioembolic source Patient is on warfarin/DOAC Patient has bleeding disorder
What should be the ongoing management for patients who have had a TIA? (1st and 2nd line)
1st line: 75mg clopidogrel OD + statin
2nd line: Aspirin + dypiridamole + statin
What is the indication for a carotid artery endarterectomy?
Stenosis >50% with <2w of signs/ symptoms
Define stroke
Rapid onset neurological deficit of a vascular origin that does not completely resolve within 24 hours
What % of strokes are ischaemic vs haemorrhagic?
Ischaemic = 80% (thrombotic/ embolic) Haemorrhagic = 20% (intracerebral haeomorrhage, SAH)
What classification system is used for strokes, and how does it classify them?
Bamford classification
Based on initial presenting signs and symptoms
What are the 4 broad classifications of stroke under the Bamford classification?
Total anterior circulation stroke
Partial anterior circulation stroke
Posterior circulation stroke
Lacunar anterior circulation stroke
How does weakness compare in the legs vs arms in anterior vs middle cerebral artery infarcts?
Anterior cerebral artery: weakness in legs > arms
Middle cerebral artery: weakness in arms > legs
What are the 3 best forms of initial investigation in stroke?
Non-contrast CT
ECG
Carotid dopplers
Recall 2 scoring systems that can be used acutely in admission for stroke
NIHSS (max score 42)
ROSIER (professional version of FAST)
What is CT ASPECT?
Grading system used to assess early CT ischaemic changes following a stroke
What is the ‘penumbra’?
Area of hypoxic parenchyma following a stroke that is still salvageable
Describe the approach to imaging investigations in suspected subarachnoid haemorrhage
1st CT head
If this is negative –> LP to assess for xanthochromia (bilirubin in CSF)
Recall the general principles of management of subarachnoid haemorrhage
21 day course of nimodipine (CCB)
1st line: Coiling (IR procedure)
2nd line: Surgical clipping (requires craniotomy)
Recall the steps of managing an ischaemic stroke
- Exclude haemorrhagic stroke using CT
Then:
- If <4.5 hours –> thrombolysis (alteplase)
ALSO do a thrombectomy IF proximal anterior circulation
- If >4.5 hours –>
After 2 WEEKS:
1. 300mg aspirin PO OD + statin
If NO AF: add clopidogrel (aspirin 2nd line)
If AF: add Xa inhibitor (eg apixaban) (warfarin 2nd line)
Recall some aspects of management of stroke outside of immediate thrombolysis/ anti-coagulation
Control:
- Fluid management (hypo/hypervolaemia can both worsen symptoms)
- Glycaemic control (hyperglycaemia –> tissue acidosis, free radicals and increased BBB permeability)
- BP control - ONLY use if BP is dangerously high as hypotension so dangerous - eg hypertensive emergency + hypertensive encephalopathy/ cardiac failure/ nephropathy/ eclampsia or aortic dissection
- Cholesterol control (eg with statin)
- Feeding assesment and management
What is the Barthel index and how is it used?
Index of disability post-stroke
10 tasks scored on a scale of independence from 0 to 10 to give a total score out of 100
What is the typical frequency of tremor in Parkinson’s?
4-6 Hz
Recall 3 signs of Parkinson’s disease that might be seen in the eyes
Nystagmus (in MSA)
Vertigal gaze palsy (in PSP)
Saccades slow
Recall some autonomic nervous system symptoms of Parkinson’s
Postural hypotension (in MSA) Urgency/ frequency (in MSA) Constipation Hypersalivation Hyperhidrosis ED