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Thrombolysis was used in 3.7% of stroke patients who were admitted to the Neurological Departments of Vienna. High doses of heparin were associated with an increased risk of secondary symptomatic hemorrhage (OR 10.3; 95% CI 2.4-43.2). But none of the patients with TIA or minor stroke who received high dosages of heparin suffered from secondary symptomatic hemorrhage. Spontaneous or therapeutically induced decrease of the diastolic blood pressure by more than 20 mmHg was associated with a three-fold risk of an unfortunate functional outcome. Complications following stroke are frequent and most likely to occur within the first 5 days. Pneumonia was found to be an independent risk factor for an unfortunate functional outcome after three months. A main field of activity of stroke units should be to prevent or to early recognize and treat complications.

Carotid endarterectomy (CEA) is proven to be beneficial in symptomatic patients with high-grade carotid stenosis (70% to 99%; residual lumen as a percentage of the normal distal internal carotid artery) on condition that the peri-operative risk for mortality and morbidity is less than 6%. A minority of the "leading experts" in North America (48%) and Western Europe (28%) recommends carotid endarterectomy in asymptomatic patients in general. Most experts suggest to perform surgery only in asymptomatic patients who are at risk for carotid occlusion in the near future or embolism. At its present state, angioplasty and stenting is an experimental although promising technique which will have to be compared to carotid endarterectomy. Criteria for duplex grading of internal carotid stenosis have been established and systematically validated to results of angiography. Pre-surgical use of angiography will more and more be restricted to selected patients in whom the results of duplex sonography remain inconclusive. The detection of microemboli with transcranial doppler sonography seems to be of particular importance before and during carotid angioplasty and stenting.

Cocaine abuse as a risk factor for acute cerebrovascular events has received too little attention, in particular in young patients. Cocaine hydrochloride causes mainly intracerebral and subarachnoidal bleeding, while crack (freebase) causes intracranial hemorrhage and ischemic infarctions with equal frequency. Although no specific antidote is known, an attempt should be made to detect the substance or its metabolites in the urine so as to provide optimal management, and encourage the patient to seek expert counselling.

Fifty-nine patients with transient ischaemic attacks or minor strokes were re-evaluated after a mean observation period of 16 months. The aim of this study was to assess their somatic and/or psychic complaints semiquantitatively. Judging from the Beschwerdenliste and the Depressivitätsskala (von Zerssen) filled in by the patients, they exhibited hardly more complaints than healthy controls; their scores were considerably lower than those of patients suffering from other organic or psychiatric diseases. Patients who not only suffered from cerebrovascular disease but also from coronary heart disease showed significantly higher scores on both scales than patients with cerebrovascular disease without clinically manifest coronary heart disease. Patients under observation for more than 2 years exhibited considerably fewer psychic complaints than those under observation for shorter periods of time. The Beschwerdenliste and the Depressivitätsskala (von Zerssen) proved useful for assessing somatic and/or psychic complaints in patients after transient ischaemic attacks or minor strokes.

The total of free and protein-bound homocysteine including its derivatives is usually summarised as "homocyst(e)ine [H(e)]". Several congenital enzyme deficiencies may cause markedly elevated H(e) plasma levels, leading to the well-known clinical syndromes of homocystinuria. Recently, mild hyperhomocyst(e)inemia has been recognised as an independent risk factor for ischaemic cerebrovascular disease, coronary heart disease, and peripheral artery disease. H(e) levels are also related to the extent of atherosclerotic vessel wall alterations. The role of mild hyperhomocyst(e)inemia in venous thromboembolic disease, however, is not yet clear. A considerable proportion of patients with mild hyperhomocyst(e)inemia suffers from a deficiency of folate, vitamin B12, and/or vitamin B6. Supplementation of these agents--alone or combined with betain--leads to a decrease or even to a normalisation of elevated H(e) levels in the majority of such patients. Hitherto, no prospective randomised studies dealing with the clinical efficacy of such a--probably innocuous--supplementation have been performed. In the meantime, adequate alimentary intake of folate should be ensured.

The role of drug abuse as a risk factor for cerebrovascular events has been underestimated, particularly in patients with juvenile stroke. The drug most often associated with acute cerebrovascular events is cocaine. After cocaine hydrochloride abuse intracerebral hemorrhages or subarachnoid hemorrhages--predominantly caused by ruptured aneurysms or arteriovenous malformations--are by far the most frequently observed cerebrovascular complications, whereas on abuse with the alkaloidal form ("crack") intracranial hemorrhages and ischemic strokes are encountered with equal frequency. In most cases, the time interval between drug abuse and the cerebrovascular event is less than 3 hours. Several pathophysiological mechanisms are discussed as serving as triggers for the cerebrovascular event, either alone or in combination. No specific antidote to cocaine is known. Nevertheless drug screening (urine analysis) should be performed immediately to allow optimal management of patients with drug-associated acute cerebrovascular events, especially in cases with juvenile stroke.