Intracranial Hemorrhage. Intracerebral haemorrhage Intracerebral haemorrhage causes about 10% of acute stroke It usually results from rupture of a blood.

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Presentation transcript:

Intracranial Hemorrhage

Intracerebral haemorrhage Intracerebral haemorrhage causes about 10% of acute stroke It usually results from rupture of a blood vessel within the brain parenchyma. Causes of intracerebral haemorrhage and associated risk factors: 1-Complex small-vessel disease with disruption of vessel wall (Age Hypertension,High cholesterol) 2-Amyloid angiopathy (Familial, Age)

3-Impaired blood clotting(Anticoagulant therapy,Blood dyscrasia,Thrombolytic therapy) 4-Vascular anomaly (Arteriovenous malformation) 5-Substance misuse (Alcohol,Amphetamines,Cocaine)

Spontaneous ICH results from intracerebral arterial rupture, particularly perforating vessels. The haematoma expands following the path of least resistance, usually along white matter tracts, and occasionally into the ventricular system. Neurological deficit results both from direct tissue destruction and indirectly from local compression and mass effect, usually in proportion to both the volume of haematoma and its rate of expansion.

Hypertensive hemorrhage occurs without warning, most commonly while the patient is awake. Headache is present in 50% of patients and may be severe; vomiting is common. Blood pressure is elevated after the hemorrhage has occurred. Thus, normal or low blood pressure in a patient with stroke makes the diagnosis of hypertensive hemorrhage unlikely, nerveless, it is wrong to believe that patients with less severe stroke syndromes can be diagnosed on clinical grounds to have had ischaemic strokes.

Clinical features vary with the site of hemorrhage: 1. Deep cerebral hemorrhage(putamin & thalamus):produces a contralateral sensorimotor deficit 2. Lobar hemorrhage:the frontal, parietal, temporal, and occipital lobes. Symptoms and signs vary according to the location 3. Pontine hemorrhage:With bleeding into the pons, coma occurs within seconds to minutes and usually leads to death within 48 hours. Ocular findings typically include pinpoint pupils. Horizontal eye movements are impaired

4. Cerebellar hemorrhage:The distinctive symptoms of cerebellar hemorrhage (headache, dizziness, vomiting, and the inability to stand or walk) begin suddenly, within minutes after onset of bleeding. Although patients may initially be alert or only mildly confused

Management of ICH A- investigation:  CT /MRI the best to detect heamoorage is brain CT  CT angiograph or MRA (magnatic resonance angiography ) in case of AVM (arteriovenois maformation ) suspension.  CBC,PT,PTT and INR for bleeding tendency  RBS and electrolyte measurement.

B-Treatment 1.Surgical measures: Cerebellar decompression if patient deteriorating neurologically or have or brain stem compression, is most important therapeutic intervention in hypertensive hemorrhage is surgical decompression for cerebellar hematomas. Unless this step is taken promptly, there may be a fatal outcome or unexpected deterioration. Note that this procedure may also reverse the neurologic deficit.

2.Medical measures o Anticoagulant and antithrombotic medications should be discontinued in the setting of acute intracerebral hemorrhage, and any coagulopathy should be reversed by administering fresh-frozen plasma and vitamin K. o The use of antihypertensive agents,BP should be controlled in all patient, when SBP between 150 and 220 acute lowering of SBP to 140 mmhg is safe.

o Antiedema agents if significant odema present such as use of manitol.

SUBARACHNOID HEMORRHAGE Spontaneous (nontraumatic) subarachnoid hemorrhage (bleeding into the subarachnoid space) is usually the result of a ruptured cerebral arterial aneurysm or an AVM. Rupture of a berry aneurysm accounts for approximately 75% of cases. Rupture occurs most often during the fifth and sixth decades, with an approximately equal sex distribution. The risk of rupture of an intracranial aneurysm varies with patient's age, and aneurysm site and size.

Hypertension has not been conclusively demonstrated to predispose to the formation of aneurysms, but acute elevation of blood pressure (e.g., at orgasm) may be responsible for rupture of aneurysms. Intracranial AVMs, a less frequent cause of subarachnoid hemorrhage (10%), occur twice as often in men and usually bleed in the second to fourth decades.

Pathology Cerebral artery aneurysms are most commonly congenital “berry” aneurysms, which result from developmental weakness of the vessel wall, especially at sites of branching. These aneurysmal dilatations arise from intracranial arteries about the circle of Willis at the base of the brain, Other congenital abnormalities, including polycystic kidney disease and coarctation of the aorta, may be associated with berry aneurysms. AVMs consist of abnormal vascular communications.

Clinical Findings The classic (but not invariable) presentation of subarachnoid hemorrhage is the sudden onset of an unusually severe generalized headache (“the worst headache I ever had in my life”). The absence of headache essentially precludes the diagnosis. A third of patient present with headache alone. In the remainder, loss of consciousness at onset is frequent, as are vomiting and neck stiffness. Symptoms may begin at any time of day and during either rest or exertion.

Investigation  computed tomography (CT) scan:will detect subarachnoid blood in more than 90% of patients  CSF examination may be needed if CT is negative which will reveled grossly bloody or the supernatant of the centrifuged CSF becomes yellow-tinged (xanthochromic) within several hours (certainly by 12 hours) following the hemorrhage

 four-vessel cerebral arteriography,CT angiography and Magnatic resonance angiography my be used to detect aneurysm and AVM.

Complications & Sequelae  RECURRENCE OF HEMORRHAGE  ARTERIAL VASOSPASM  ACUTE OR SUBACUTE HYDROCEPHALUS  SEIZURES  Syndrum of Inappropriate antidiuretic hormone secretion(SIADH) and resultant diabetes insipidus can occur.

MEDICAL TREATMENT: preventing elevation of arterial pressure that might rerupture the aneurysm or AVM. absolute bed rest, mild sedation, and analgesics for headache Drugs impairing platelet function (e.g., aspirin) or anticoagulation should be avoided. Intravenous fluids should be administered with care, since overhydration can exacerbate cerebral swelling. Intravenous fluids should be isotonic to minimize free water exacerbating

brain edema. Normal saline can be given in amounts sufficient to ensure normovolemia. Hyponatremia is frequently seen,serum sodium should be monitor daily.treat hyponatramia Prophylactic use of the calcium channel antagonist drug nimodipine, 60 mg orally every 4 hours for 21 days, may reduce the ischemic sequelae of cerebral vasospasm. SURGICAL TREATMENT : ruptured aneurysm consists of clipping the neck of the aneurysm or the endovascular placement of a coil to induce clotting.

AVMs—Surgically accessible AVMs may be removed by en bloc resection or obliterated by ligation of feeding vessels or embolization via local intra-arterial catheter.

CEREBRAL VENOUS DISEASE: Thrombosis of the cerebral veins and venous sinuses (cerebral venous thrombosis) is much less common than arterial thrombosis. Cerebral venous sinus thrombosis usually presents with symptoms of raised intracranial pressure such as headach and papillodema,also seizures, focal neurological symptoms and sometime coma. The clinical features vary according to the sinus involved

Common causes of cerebral venous thrombosis Dehydration Thrombophilia Pregnancy Oral contraceptive use

Investigations  MR venography demonstrates a filling defect in the affected vessel.

Treatment Anticoagulation, initially with heparin followed by warfarin, is usually beneficial