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Malattie Cerebrovascolari Prof. V Di Piero [email protected]

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Page 1: Presentazione di PowerPoint - uniroma1.it...Living at home but not independent Independent Living in long-term care institutions Dead 45.000 26.000 52.000 37.000 If 150.000 :outcome

Malattie Cerebrovascolari

Prof. V Di Piero

[email protected]

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The lifetime risk

of stroke

is

1 in 5 for women 1 in 6 for men

Every two seconds, someone in the world suffers a strokeEvery six

seconds, someone dies of a strokeEvery six seconds, someone’s quality of life will forever be changed – they will permanently be physically

disabled due to stroke

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le vasculopatie cerebrali sono

la seconda causa di morte

e

la prima causa di invalidità

nel mondo occidentale

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1500 g di neuroni e glia

150 g di glucosio

72 litri di ossigeno

24 h

minuto per minuto

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dei 70 cc di sangue che entrano

ad ogni battito cardiaco

nell’aorta ascendente

10-15 vanno al cervello

ogni minuto

350 cc passano

da ogni carotide interna

100-200 cc

dal sistemaa vertebrobasilare

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AUTOREGOLAZIONE

DEL

FLUSSO EMATICO CEREBRALE

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CBF variations in relation to PaCO2 changes

100

40 60 80 mmHg 20 0

50

0 5 10 KPa

Carbone Dioxide Tension

.

.

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CBF variations in relation to PaO2 changes

100

100 150 mmHg 50 0

50

0 10 20 KPa

Arterial Oxygen Tension

.

.

150

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ETIOPATOGENESI

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Hemorrhage •Intracerebral

•Subarachnoid

•Subdural/epidural

Ischemic Stroke

STROKE

15% 85%

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FISIOPATOLOGIA ISCHEMIA CEREBRALE

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Cerebral events during progressive vascular constriction

Hakim, 1998

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The ischaemic penumbra

Heiss et al., 1999

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I NUMERI

quanti sono?

chi sono?

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75.000 per year

?150.000?

First-ever brain attacks in Italy

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MORTALITA’:

CVD in generale 23%

Stroke Ischemico 16%

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Living at home but not independent

Independent

Living in long-term care institutions

Dead

45.000

26.000

52.000

37.000

If 150.000 :outcome at 6 months

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Severe stroke is more expensive

Smurawaska et al., Stroke, 1994

In Canada the average cost

per stroke admission:

21.150 USD

11.550 USD 61.500 USD

mild severe

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Diagnostica differenziale nelle CVD

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Abrupt Focal CNS Deficit

Nonvascular •Seizure

•Tumor

•Demyelination

•Psychogenic

Hemorrhage •Intracerebral

•Subarachnoid

•Subdural/epidural

Ischemic Stroke

Vascular

95% 5%

15% 85%

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Abrupt Focal CNS Deficit

Nonvascular •Seizure

•Tumor

•Demyelination

•Psychogenic

Hemorrhage •Intracerebral

•Subarachnoid

•Subdural/epidural

Ischemic Stroke

Vascular

95% 5%

15% 85%

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Abrupt Focal CNS Deficit

Nonvascular •Seizure

•Tumor

•Demyelination

•Psychogenic

Hemorrhage •Intracerebral

•Subarachnoid

•Subdural/epidural

Ischemic Stroke

Vascular

95% 5%

15% 85%

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Fig 15

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Abrupt Focal CNS Deficit

Nonvascular •Seizure

•Tumor

•Demyelination

•Psychogenic

Hemorrhage •Intracerebral

•Subarachnoid

•Subdural/epidural

Ischemic Stroke

Vascular

95% 5%

15% 85%

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Fig 10

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Fig 11

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Abrupt Focal CNS Deficit

Nonvascular •Seizure

•Tumor

•Demyelination

•Psychogenic

Hemorrhage •Intracerebral

•Subarachnoid

•Subdural/epidural

Ischemic Stroke

Vascular

95% 5%

15% 85%

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Atherosclerotic

Cerebrovascular

Disease

Penetrating

Artery Disease

(“Lacunes”)

Cardiogenic

Embolism

Other, Unusual

Causes

•Atrial Fibrillation

•Valve Disease

•Ventricular thrombi

•Many others

•Prothrombotic states

•Dissections

•Arteritis

•Migraine

•Vasospasm

•Drug abuse

•Many more

Intracranial

Microatheroma

Large Artery

Atheroma

Hypoperfusion Arteriogenic Emboli

60% 20% 15% 5%

Ischemic Stroke

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Fig 26

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Fig 27

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Fig 28

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Fig 32

a b

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Fig 29

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Ostruzione prossimale della cerebrale media

Fig 51

b b a

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Fig 31

a b

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Fig 25

a b

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Atherosclerotic

Cerebrovascular

Disease

Penetrating

Artery Disease

(“Lacunes”)

Cardiogenic

Embolism

Other, Unusual

Causes

•Atrial Fibrillation

•Valve Disease

•Ventricular thrombi

•Many others

•Prothrombotic states

•Dissections

•Arteritis

•Migraine

•Vasospasm

•Drug abuse

•Many more

Intracranial

Microatheroma

Large Artery

Atheroma

Hypoperfusion Arteriogenic Emboli

60% 20% 15% 5%

Ischemic Stroke

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INQUADRAMENTO DIAGNOSTICO CLINICO

1. Anamnesi 2. Definizione dei sintomi 3. Diagnosi di sede 4. Sindromi cliniche 5. Diagnosi di causa 6. Identificazione dei fattori di rischio 7. Esame obiettivo generale

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INQUADRAMENTO DIAGNOSTICO CLINICO

Obiettivi generali della raccolta anamnestica sono: - definizioni delle caratteristiche temporali e topografiche dei sintomi - inquadramento diagnostico differenziale - identificazione dei fattori di rischio e patologie concomitanti -Riconoscimento di cause insolite di ictus

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INQUADRAMENTO DIAGNOSTICO CLINICO

Caratteristiche cliniche dell’ ictus ischemico ed emorragico Ictus ischemico: * deterioramento a gradini o progressivo * segni neurologici focali corrispondenti ad un territorio vascolare * segni indicativi di una lesione focale corticale o sottocorticale Ictus emorragico: * precoce e prolungata perdita di coscienza * cefalea importante * rigidità nucale * segni neurologici focali che non corrispondono ad un territorio vascolare

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INQUADRAMENTO DIAGNOSTICO CLINICO

Diagnosi di causa Criteri TOAST validi per i sottotipi di ictus ischemico - Aterosclerosi dei vasi di grosso calibro - Cardioembolia (possibile/probabile) - Occlusione dei piccoli vasi - Ictus da cause diverse - Ictus da cause non determinate

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INQUADRAMENTO DIAGNOSTICO DI LABORATORIO

•Esami ematochimici di routine •Coagulazione (INR, aPTT, PT, fibrinogeno)

Nell’ ictus “giovanile” * Ricerca di Autoanticorpi (aCLA, aB2glicoproteina…) * Dosaggio Omocisteina * Biologia molecolare dei fattori della coagulazione (Fattore V di Leiden, omozigosi MTHFR, alterazioni proteina C e S…)

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INQUADRAMENTO DIAGNOSTICO RADIOLOGICO

TC cerebrale La TC cerebrale è indicata in urgenza per: * la diagnosi differenziale tra ictus ischemico ed emorragico ed altre patologie non cerebrovascolari * l’identificazione di eventuali segni precoci di sofferenza ischemica encefalica ( segno dell’ iperdensità ACM, ipodensità precoce)

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INQUADRAMENTO DIAGNOSTICO RADIOLOGICO

Risonanza magnetica La RM convenzionale in urgenza non fornisce informazioni più accurate della TC. Le tecniche di DWI e PWI in RM consentono un più accurato inquadramento patogentico e pronostico.

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INQUADRAMENTO DIAGNOSTICO NEUROSONOLOGICO

Eco-color Doppler dei tronchi sopraortici (TSA) Si tratta di una metodica semplice, non invasiva, a basso costo, abbastanza accurata capace di individuare una patologia stenosante od occlusiva dell’arteria carotide interna (ACI). Può identificare anche un’eventuale dissecazione della carotide o dell’arteria vertebrale. Tramite l’utilizzo del Doppler transcranico (TCD) si può valutare il circolo intracranico, l’eventuale stenosi e circoli di compenso.

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TERAPIA

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Therapeutic Strategies in

Acute Ischemic Stroke

•Reperfusion

‹‹ Recanalization

‹‹ Increase collaterals

• Neuroprotection

• Avert clot propagation

• Prevent complications

‹‹ thrombolysis

‹‹ Supportive care

‹‹ Supportive care

‹‹ Aspirin

‹‹ Supportive care

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Time is brain

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CRITERIO “ TEMPO “

il TIA

lo STROKE

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Definition and Evaluation of TIA A Scientific Statement for Healthcare Professionals From the American Heart

Association/American Stroke Association Stroke Council; Council on Cardiovascular Surgery and Anesthesia; Council on Cardiovascular Radiology and Intervention; Council on Cardiovascular

Nursing; and the Interdisciplinary Council on Peripheral Vascular Disease

10-15% of patients have a stroke within 3 months, with half occurring within 48 hours. Acute treatments for TIA also have evolved, with new data supporting early rather than delayed carotid endarterectomy for TIA patients with carotid stenosis.

Easton, 2009

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Definition and Evaluation of TIA A Scientific Statement for Healthcare Professionals From the American Heart

Association/American Stroke Association Stroke Council; Council on Cardiovascular Surgery and Anesthesia; Council on Cardiovascular Radiology and Intervention; Council on Cardiovascular

Nursing; and the Interdisciplinary Council on Peripheral Vascular Disease

Easton, 2009

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(American Stroke Association - May, 2009)

Acute neurovascular syndrome

TIA

Stroke

Manifest Silent

Hospitalized: ABCD2 ≥ 4

or ABCD2 < 4 if

Work-up > 2 days

Evidences of focal ischemia

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(American Stroke Association - May, 2009)

Acute neurovascular syndrome

TIA

Stroke

Manifest Silent

Hospitalized: ABCD2 ≥ 4

or ABCD2 < 4 if

Work-up > 2 days

Evidences of focal ischemia

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Validation and refinement of scores to predict very early stroke risk after TIA

Claiborne, 2007

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Does ABCD2 Score Below 4 Allow More Time to Evaluate Patients

With a Transient Ischemic Attack?

1176 patients with definite or possible TIA or minor stroke

24.7% (n291) criteria for emergency treatment: presence of symptomatic internal carotid stenosis 50%, symptomatic intracranialstenosis 50%, or a major cardiac source of embolism.

Amarenco, 2009

ABCD2 ≥ 4 (31.6%, n157) ABCD2 <4 (19.7%, n134) ABCD2 score

Sensitivity 54.0% (95% CI, 48.2 to 59.7) Specificity 61.6% (95% CI, 58.4 to 64.8)

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Does ABCD2 Score Below 4 Allow More Time to Evaluate Patients

With a Transient Ischemic Attack?

In conclusion, no patients with ipsilateral symptomatic carotid stenosis 50% or with atrial fibrillation should be

missed or overlooked regardless of ABCD2 score.

Based on our data, when triaging patients based on ABCD2 score above or below 4, clinicians should perform

immediate (within 24 hours) carotid ultrasound examination (or default angiographic CT scan) and an electrocardiogram

in patients with a TIA before deciding to postpone the workup beyond the 24-hour window.

Amarenco, 2009

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TIA

a basso rischio ad alto rischio

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TIA: quod agendum?

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Acute Neurovascular Syndrome is an emergency

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