Return to Work 2-5 Years After Stroke: A Cross Sectional Study in a Hospital-Based Population

Purpose To describe factors associated with RTW in patients 2-5 years after stroke. Methods Cross sectional study, including patients 2-5 years after hospitalization for a first-ever stroke, who were <65 years and had been gainfully employed before stroke. Patients completed a set of questionnaires on working status and educational level, physical functioning (Frenchay Activities Index, FAI), mental functioning (Hospital Anxiety and Depression Scale, HADS), Coping Orientations to Problems Experienced, (COPE easy) and quality of life (Short-Form(SF)-36 and EQ(Euroqol)-5D). Caregivers completed the Caregiver Strain Index (CSI). Baseline stroke characteristics were gathered retrospectively. Baseline characteristics and current health status were compared between patients who did and did not RTW by means of logistic regression analysis with odds ratios (OR) and 95 % confidence intervals (CI), adjusted for age and gender. Results Forty-six patients were included, mean age of 47.7 years (SD 9.7), mean time since stroke of 36 months (SD 11.4); 18 (39 %) had RTW. After adjusting for age and gender a shorter length of hospitalization was associated with RTW (OR 0.87; CI 0.77-0.99). Of the current health status, a lower HADS depression score (0.76; 0.63-0.92), a less avoidant coping style (1.99; 0.80-5.00), better scores on the FAI (1.13; 1.03-1.25), the mental component summary score of the SF36 (1.07; 1.01-1.13), the EQ5D (349; 3.33-36687) and the CSI (0.68; 0.50-0.92) were associated with the chance of RTW. Conclusions A minority of working patients RTW after stroke; a shorter duration of the initial hospitalization was associated with a favorable work outcome. The significant association between work status and activities, mental aspects and quality of life underlines the need to develop effective interventions supporting RTW.

Increased admission and fasting glucose are associated with unfavorable short-term outcome after intra-arterial treatment of ischemic stroke in the MR CLEAN pretrial cohort

BACKGROUND

Limited data are available on the impact of fasting glucose on outcome after intra-arterial treatment (IAT). We studied whether hyperglycemia on admission and impaired fasting glucose (IFG) are associated with unfavorable outcome after IAT in acute ischemic stroke.

METHODS

Patients were derived from the pretrial registry of the MR CLEAN-trial. Hyperglycemia on admission was defined as glucose>7.8mmol/L, IFG as fasting glucose>5.5mmol/L in the first week of admission. Primary effect measure was the adjusted common odds ratio (acOR) for a shift in the direction of worse outcome on the modified Rankin Scale at discharge, estimated with ordinal logistic regression, adjusted for common prognostic factors.

RESULTS

Of the 335 patients in which glucose on admission was available, 86 (26%) were hyperglycemic, 148 of the 240 patients with available fasting glucose levels (62%) had IFG. Median admission glucose was 6.8mmol/L (IQR 6-8). Increased admission glucose (acOR 1.2, 95%CI 1.1-1.3), hyperglycemia on admission (acOR 2.6, 95%CI 1.5-4.6) and IFG (acOR 2.8, 95%CI 1.4-5.6) were associated with worse functional outcome at discharge.

CONCLUSION

Increased glucose on admission and IFG in the first week after stroke onset are associated with unfavorable short-term outcome after IAT of acute ischemic stroke.

Comparison of CTA- and DSA-Based Collateral Flow Assessment in Patients with Anterior Circulation Stroke

BACKGROUND AND PURPOSE

Collateral flow is associated with clinical outcome after acute ischemic stroke and may serve as a parameter for patient selection for intra-arterial therapy. In clinical trials, DSA and CTA are 2 imaging modalities commonly used to assess collateral flow. We aimed to determine the agreement between collateral flow assessment on CTA and DSA and their respective associations with clinical outcome.

MATERIALS AND METHODS

Patients randomized in MR CLEAN with middle cerebral artery occlusion and both baseline CTA images and complete DSA runs were included. Collateral flow on CTA and DSA was graded 0 (absent) to 3 (good). Quadratic weighted κ statistics determined agreement between both methods. The association of both modalities with mRS at 90 days was assessed. Also, association between the dichotomized collateral score and mRS 0-2 (functional independence) was ascertained.

RESULTS

Of 45 patients with evaluable imaging data, collateral flow was graded on CTA as 0, 1, 2, 3 for 3, 10, 20, and 12 patients, respectively, and on DSA for 12, 17, 10, and 6 patients, respectively. The κ-value was 0.24 (95% CI, 0.16-0.32). The overall proportion of agreement was 24% (95% CI, 0.12-0.38). The adjusted odds ratio for favorable outcome on mRS was 2.27 and 1.29 for CTA and DSA, respectively. The relationship between the dichotomized collateral score and mRS 0-2 was significant for CTA (P = .01), but not for DSA (P = .77).

CONCLUSIONS

Commonly applied collateral flow assessment on CTA and DSA showed large differences, indicating that these techniques are not interchangeable. CTA was significantly associated with mRS at 90 days, whereas DSA was not.

Assessment of Collateral Status by Dynamic CT Angiography in Acute MCA Stroke: Timing of Acquisition and Relationship with Final Infarct Volume

BACKGROUND AND PURPOSE

Dynamic CTA is a promising technique for visualization of collateral filling in patients with acute ischemic stroke. Our aim was to describe collateral filling with dynamic CTA and assess the relationship with infarct volume at follow-up.

MATERIALS AND METHODS

We selected patients with acute ischemic stroke due to proximal MCA occlusion. Patients underwent NCCT, single-phase CTA, and whole-brain CT perfusion/dynamic CTA within 9 hours after stroke onset. For each patient, a detailed assessment of the extent and velocity of arterial filling was obtained. Poor radiologic outcome was defined as an infarct volume of ≥70 mL. The association between collateral score and follow-up infarct volume was analyzed with Poisson regression.

RESULTS

Sixty-one patients with a mean age of 67 years were included. For all patients combined, the interval that contained the peak of arterial filling in both hemispheres was between 11 and 21 seconds after ICA contrast entry. Poor collateral status as assessed with dynamic CTA was more strongly associated with infarct volume of ≥70 mL (risk ratio, 1.9; 95% CI, 1.3-2.9) than with single-phase CTA (risk ratio, 1.4; 95% CI, 0.8-2.5). Four subgroups (good-versus-poor and fast-versus-slow collaterals) were analyzed separately; the results showed that compared with good and fast collaterals, a similar risk ratio was found for patients with good-but-slow collaterals (risk ratio, 1.3; 95% CI, 0.7-2.4).

CONCLUSIONS

Dynamic CTA provides a more detailed assessment of collaterals than single-phase CTA and has a stronger relationship with infarct volume at follow-up. The extent of collateral flow is more important in determining tissue fate than the velocity of collateral filling. The timing of dynamic CTA acquisition in relation to intravenous contrast administration is critical for the optimal assessment of the extent of collaterals.

Early Magnesium Treatment After Aneurysmal Subarachnoid Hemorrhage: Individual Patient Data Meta-Analysis

BACKGROUND AND PURPOSE

Delayed cerebral ischemia (DCI) is an important cause of poor outcome after aneurysmal subarachnoid hemorrhage (SAH). Trials of magnesium treatment starting <4 days after symptom onset found no effect on poor outcome or DCI in SAH. Earlier installment of treatment might be more effective, but individual trials had not enough power for such a subanalysis. We performed an individual patient data meta-analysis to study whether magnesium is effective when given within different time frames within 24 hours after the SAH.

METHODS

Patients were divided into categories according to the delay between symptom onset and start of the study medication: <6, 6 to 12, 12 to 24, and >24 hours. We calculated adjusted risk ratios with corresponding 95% confidence intervals for magnesium versus placebo treatment for poor outcome and DCI.

RESULTS

We included 5 trials totaling 1981 patients; 83 patients started treatment<6 hours. For poor outcome, the adjusted risk ratios of magnesium treatment for start <6 hours were 1.44 (95% confidence interval, 0.83-2.51); for 6 to 12 hours 1.03 (0.65-1.63), for 12 to 24 hours 0.84 (0.65-1.09), and for >24 hours 1.06 (0.87-1.31), and for DCI, <6 hours 1.76 (0.68-4.58), for 6 to 12 hours 2.09 (0.99-4.39), for 12 to 24 hours 0.80 (0.56-1.16), and for >24 hours 1.08 (0.88-1.32).

CONCLUSIONS

This meta-analysis suggests no beneficial effect of magnesium treatment on poor outcome or DCI when started early after SAH onset. Although the number of patients was small and a beneficial effect cannot be definitively excluded, we found no justification for a new trial with early magnesium treatment after SAH.

Safety of intra-arterial treatment in acute ischaemic stroke patients on oral anticoagulants. A cohort study and systematic review

BACKGROUND AND PURPOSE

An elevated international normalized ratio (INR) of >1.7 is a contraindication for the use of intravenous thrombolytics in acute ischaemic stroke. Local intra-arterial therapy (IAT) is considered a safe alternative. The safety and outcome of IAT were investigated in patients with acute ischaemic stroke using oral anticoagulants (OACs).

METHODS

Data were obtained from a large national Dutch database on IAT in acute stroke patients. Patients were categorized according to the INR: >1.7 and ≤1.7. Primary outcome was symptomatic intracerebral hemorrhage (sICH), defined as deterioration in the National Institutes of Health Stroke Scale score of ≥4 and ICH on brain imaging. Secondary outcomes were clinical outcome at discharge and 3 months. Occurrence of outcomes was compared with risk ratios and corresponding 95% confidence intervals. Further, a systematic review and meta-analysis on sICH risk in acute stroke patients on OACs treated with IAT was performed.

RESULTS

Four hundred and fifty-six patients were included. Eighteen patients had an INR > 1.7 with a median INR of 2.4 (range 1.8-4.1). One patient (6%) in the INR > 1.7 group developed a sICH compared with 53 patients (12%) in the INR ≤ 1.7 group (risk ratio 0.49, 95% confidence interval 0.07-3.13). Clinical outcomes did not differ between the two groups. Our meta-analysis showed a first week sICH risk of 8.1% (95% confidence interval 3.9%-17.1%) in stroke patients with elevated INR treated with IAT.

CONCLUSION

The use of OACs, leading to an INR > 1.7, did not seem to increase the risk of an sICH in patients with an acute stroke treated with IAT.

Systemic small-vessel disease is not exclusively related to lacunar stroke. A pilot study

BACKGROUND AND PURPOSE

Lacunar infarcts usually results from a vasculopathy of the small vessels of the brain. It is not known whether this small-vessel disease is exclusively related to the brain or part of a more systemic small-vessel disease. In this study, patients with a lacunar stroke were investigated for manifestations of extracerebral small and large-vessel disease in comparison with cortical stroke patients.

METHODS

Twenty-nine patients with a lacunar stroke, presumably caused by small-vessel disease, and 30 patients with a cortical stroke, presumably caused by large-vessel disease, entered the study. Extracerebral large-vessel disease was investigated using carotid and renal duplex scanning and Doppler sonography of the large leg vessels. Extracerebral small-vessel disease was studied from photographs of the retina, renal perfusion scintigraphy before and after angiotensin-converting enzyme inhibition, plasma renin measurement, and capillary microscopy of the nailfold.

RESULTS

Vascular risk factor profile was similar in both stroke subgroups. Carotid large-vessel disease (stenosis > or =50%) was significantly less frequent among lacunar stroke patients (lacunar 3% v cortical 50%, (c)OR=0.04; 95% CI, 0.01 to 0.21, P<.01). Large-vessel disease of the renal artery (lacunar 23% v cortical 27%), and the legs (lacunar 38% v cortical 37%) was similar in both stroke groups. There was a high frequency of mild retinal arteriolosclerosis in both groups (lacunar 92% v cortical 80%). Renal blood flow changes were abnormal in 40% of the lacunar and 38% of the cortical stroke patients as a sign of renal small-vessel disease. Plasma renin concentrations did not differ between both groups. Both lacunar and cortical stroke patients had normal nailford capillary morphology, but red blood cell dynamics were reduced in both stroke groups, indicating small-vessel dysfunction.

CONCLUSION

Lacunar and cortical stroke patients have both manifestations of systemic small-and large-vessel disease. Therefore, systemic small-vessel disease is not exclusively related to lacunar stroke patients who presumably have cerebral small vessel disease. A similar conclusion can be reached in cortical stroke patients.

[Carotid endarterectomy indicated in asymptomatic stenosis]

Carotid endarterectomy (CE) is of proven value for patients with a high-grade symptomatic stenosis of the internal carotid artery (ICA). Recently, the Asymptomatic Carotid Atherosclerosis Study group showed that in patients with an asymptomatic ICA stenosis of more than 60%, CE caused an absolute risk reduction of perioperative death or stroke during 5 year follow-up of 5.4% (95% confidence interval: 3.0-7.8). Half of these strokes were disabling. The number needed to treat to save one patient from death within 30 days or stroke within in the following 5 years was 19. Further studies are needed to isolate a group of patients that will substantially benefit from the operation. CE is probably most effective in males under 75 years of age. A low surgical morbidity and mortality is an absolute prerequisite to justify CE for an asymptomatic ICA stenosis.

Peripheral Arterial Disease: Public and Patient Awareness in the Netherlands

OBJECTIVE

To determine critical issues for future awareness programmes on peripheral arterial disease (PAD).

DESIGN

National Dutch survey.

MATERIALS AND METHODS

A representative sample of 1294 members of the general population, and 281 patients with PAD from the Capi@home database were administered a questionnaire concerning awareness of PAD.

RESULTS

The response rate was 81% for the general population and 78% for patients with PAD. The familiarity with PAD terminology and symptoms amongst the general population was low. Few patients (20%) were aware that PAD was a disease of arteries. Amongst both the general population and the patient populations, PAD risk factors identification was low: hypertension (4% versus 0%); hypercholesterolaemia (9% versus 12%), diabetes (2% versus 8%), and smoking (27% versus 52%). Knowledge was moderate in both populations about treatment with exercise, but low for smoking cessation. The general population was unaware of the central role of general practitioners in the treatment of PAD.

CONCLUSIONS

The awareness of symptoms, risk factors, and treatment options for PAD is low. Both population and patients needed only minimal information to relate PAD to other atherosclerotic diseases. Based on the results of this survey the Dutch Platform of Peripheral Arterial Disease together with the Dutch Heart Foundation are initiating the first awareness campaign on atherosclerosis.

Stroke service in The Netherlands: an exploratory study on effectiveness, patient satisfaction and utilisation of healthcare

Objective

To assess whether shared care for stroke patients results in better patient outcome, higher patient satisfaction and different use of healthcare services.

Design

Prospective, comparative cohort study.

Setting

Two regions in the Netherlands with different healthcare models for stroke patients: a shared care model (stroke service) and a usual care setting.

Patients

Stroke patients with a survival rate of more than six months, who initially were admitted to the Stroke Service of the University Hospital Maastricht (experimental group) in the second half of 1997 and to a middle sized hospital in the western part of the Netherlands between March 1997 and March 1999 (control group).

Main outcome measures

Functional health status according to the SIP-68, EuroQol, Barthel Index and Rankin Scale, patient satisfaction and use of healthcare services.

Results

In total 103 patients were included in this study: 58 in the experimental group and 45 in the control group. Six months after stroke, 64% of the surviving patients in the experimental group had returned home, compared to 42% in the control group (p<0.05). This difference could not be explained by differences in health status, which was comparable at that time. Patients in the shared care model scored higher on patient satisfaction, whereas patients in the usual care group received a higher volume of home care.

Conclusions

The Stroke Service Maastricht resulted in a higher number of patients who returned home after stroke, but not in a better health status. Since patients in the usual care group received a higher volume of healthcare in the period of rehabilitation, the Stroke Service Maastricht might be more efficient.

The user in the design process of an EPR

To optimise the development and implementation process of an electronic patient record, attitudes toward computers in health care and satisfaction with paper records of nurses and physicians of a department in an academic hospital were determined. For this purpose participants received two questionnaires. These results were supplemented with eight semi-structured in-depth interviews. Users who considered themselves as experienced computer users had more positive attitudes. Inexperienced users were more satisfied with the nursing paper record, while no significant differences existed for the paper medical record.

An experimental electronic patient record for stroke patients. Part 1: situation analysis

In this article the paper record and its position in work practices is discussed, and is related to the situation at an inpatient clinic for which an electronic patient record (EPR) is in development. In addition reported research on innovations is discussed. An analysis of 42 clinical paper records gave insight into existing problems with paper records. The current work practices were analysed based on two periods of observations in the ward and eight in-depth interviews with questions about their daily work, communication in the ward and the role of the paper record in communication. The results indicate that several problems described in the literature were recognised only for a part of the medical and nursing records. One probable cause of insufficient communication between health care workers appeared to be the internal organisation of the paper records. The fact that the experimental EPR system will be small-scaled, introduces specific problems regarding communication with other departments that still work with paper records. Nevertheless, we conclude that also an electronic patient record designed for a specific setting has the potential to improve record keeping and communication between health care workers.

An experimental electronic patient record for stroke patients. Part 2: system description

This article presents an electronic patient record (EPR) for stroke patients. At the neurology department of the Maastricht University Hospital, coordination and communication of the multidisciplinary team for stroke patients is intended to be supported by an EPR. Existing, structured, paper nursing and medical records served as a starting point for the development of the EPR. In close cooperation with future users, the database structure, and data entry and data retrieval aspects of the user interface were adapted to the domain of stroke. The result is a combined electronic medical and nursing record that has potential to improve record keeping and to truly support daily routines. The challenges encountered in the development process were maintaining continuous user involvement and conflicting points of view regarding the relevance of clinical data. Conclusively, we state that intensive user participation improved the EPR, coupling with the existing hospital information system and other systems will be advantageous and the fact that the paper records were structured in advance will smooth the unavoidable changes in work patterns.

[Thrombolytic therapy of brain infarct: the end of beginning]

Thrombolysis by intravenous application of thrombolytic drugs may improve the outcome of patients with a brain infarct, but it also entails risks. The effect of recombinant tissue plasminogen activator (rtPA) was compared with placebo in three medium-sized randomized controlled clinical trials. One study, performed in North America, showed a clear benefit of rtPA administered within 3 hours after the onset of symptoms. Two European trials showed a less strong effect, but the number of patients who were independent after 3 months' follow-up was also larger after treatment with rtPA within 6 hours. A meta-analysis of all three trials demonstrates a significant advantage of rtPA over placebo for all the usual outcome measures, without significant excess mortality in the rtPA group. The chance of being able to live independently increases by about 8% after treatment with rtPA. In conclusion there is now sufficient evidence to start with thrombolytic treatment for cerebral infarcts in hospitals with a stroke unit, if a number of additional quality standards for the acute diagnosis and treatment of stroke patients are met.

[Thrombolytic therapy in patients with acute brain infarction: favorable preliminary results in Maastricht]

OBJECTIVE

To assess the feasibility of acute thrombolysis for ischaemic stroke in clinical practice.

DESIGN

Prospective.

METHOD

On July 1st, 1998 thrombolytic therapy for ischaemic stroke was introduced in the University Hospital Maastricht, the Netherlands. All patients admitted with ischaemic stroke were prospectively registered during the first year. Of all patients with ischaemic stroke, it was determined how many were potentially eligible for thrombolysis within 3 hours of stroke symptom onset, and how many of these patients were actually treated with thrombolysis. Furthermore, the reasons for exclusion from thrombolytic therapy were assessed. Several baseline and clinical patient characteristics were noted.

RESULTS

During the first year 18 ischaemic stroke patients were treated with thrombolysis within 3 hours of stroke onset. These 18 patients constituted 7% of all 256 ischaemic stroke patients and 18% of the potentially eligible patients who arrived in the hospital within 3 hours. More than 40% of the ischaemic stroke patients were not eligible for thrombolysis due to late arrival in the hospital. There were no major complications in the 18 treated patients: 3 patients developed an asymptomatic haemorrhagic transformation of the infarct.

CONCLUSION

Acute thrombolysis for ischaemic stroke within 3 hours from stroke onset is feasible, and can under specific conditions be applied in clinical practice. Only 7% of all ischaemic stroke patients underwent thrombolysis. This percentage of patients could be increased by an earlier presentation of patients to the hospital.

An experimental electronic patient record for stroke patients

This contribution describes an electronic patient record for stroke patients at the neurology ward of the Maastricht University Hospital. Daily practice at the ward will be supported with the developed electronic patient record that integrates both the medical and the nursing record, that will provide decision support and it will be connected to the hospital information system. In an evaluation project we will study the effects of the usage of the electronic patient record and additional effects of providing decision support.

Interobserver agreement in the assessment of cerebral atrophy on CT using bicaudate and sylvian-fissure ratios

To assess the interobserver variability of cerebral-atrophy measures on CT, three investigators measured the bicaudate ratio (BCR) and the sylvian-fissure ratio (SFR) on 20 CT studies of patients with ischaemic stroke. The intraclass correlation coefficient of BCR measurements was 0.82 [95% confidence interval (CI) 0.75-0.94], and that of SFR measurements 0.69 (95% CI 0.57-0.89). The range of pairwise-calculated Pearson correlation coefficients was smaller for measurement of the BCR (0.89-0.92) than for the SFR measurements (0.66-0.84).

Significant progression of white matter lesions and small deep (lacunar) infarcts in patients with stroke

OBJECTIVE

To investigate whether the extent of white matter lesions (WMLs) and the number of small deep infarcts and territorial infarcts progress over time in patients with stroke and to test the hypothesis that WMLs are associated with small deep infarcts.

DESIGN

Computed tomographic follow-up study in a cohort of 107 patients with ischemic stroke (median follow-up, 3.0 years).

SETTING

Primary and referral care center.

PATIENTS

Sixty-three of 144 registered patients with a first-ever symptomatic lacunar stroke and 44 of 155 with a territorial stroke entered this study. Forty-seven (33%) of the nonparticipating patients with a lacunar stroke and 54 (35%) of those with a territorial stroke died, and 34 (24%) and 57 (37), respectively, refused computed tomographic follow-up.

MAIN OUTCOME MEASURES

The extent of the WMLs and the number of small deep and territorial infarcts on computed tomographic scans at study entry and at follow-up.

RESULTS

Progression of WMLs occurred in 26 patients (26%), and multivariate regression analysis showed that it was associated with symptomatic lacunar stroke at study entry (adjusted odds ratio [aOR], 5.0; 95% confidence interval [CI], 1.2-20.3), silent small deep infarcts at study entry (aOR, 6.0, 95% CI, 1.0-34.6), old age (aOR, 5.5; 95% CI, 1.3-23.1), and longer follow-up (aOR, 12.7; 95% CI, 1.8-89.0). We found progression of small deep infarcts in 41 patients (38%). The progression was associated with symptomatic lacunar stroke at study entry (aOR, 27.7; 95% CI, 6.3-120.9) and longer follow-up (aOR, 7.7; 95% CI, 1.4-41.3). Progression of both WMLs and small deep infarcts, which occurred in 16 patients (16%), was associated with symptomatic lacunar stroke at study entry (aOR, 34.1; 95% CI, 2.5-471.7), silent small deep infarcts at study entry (aOR, 12.5; 95% CI, 1.4-112.0), and longer follow-up (aOR, 29.7; 95% CI, 1.8-501.0). The number of territorial infarcts increased in 14 patients (13%). The increase was associated with symptomatic territorial stroke at study entry (aOR, 7.9; 95% CI, 1.5-40.8) and a history of ischemic heart disease (aOR, 6.6; 95% CI, 1.3-34.8).

CONCLUSIONS

The marked progression of WMLs and small deep infarcts that occurred mainly in patients with lacunar stroke suggests that both WMLs and small deep (lacunar) infarcts are caused by a similar vasculopathy that affects small vessels, which is progressive despite standard stroke treatment.

Isolated hemiataxia after supratentorial brain infarction

Acute isolated hemiataxia is in most cases due to infratentorial (cerebellar) stroke. It has only twice been described in supratentorial stroke--namely, after thalamic infarction and a capsular haemorrhage. Three patients with isolated hemiataxia after a supratentorial brain infarct are described. These patients were seen in a period of five years during which 899 patients with a first supratentorial brain infarct were registered. Clinically the hemiataxia was of the cerebellar type. In two patients, CT and MRI showed a small, deep (lacunar) infarct restricted to the posterior limb of the internal capsule, a site not previously reported in isolated hemiataxia. The third patient had a small, deep (lacunar) infarct in the thalamus extending into the adjacent posterior limb of the internal capsule. Isolated hemiataxia after a supratentorial brain infarct is a very rare clinical stroke syndrome. The cerebellar type hemiataxia was most likely caused by interruption of the cerebellar pathways at the level of the internal capsule. Our cases confirm prior observations that the cerebellar pathways run through the posterior part of the posterior limb of the internal capsule separately from the motor and sensory pathways.

What causes false clinical prediction of small deep infarcts?

BACKGROUND AND PURPOSE

Our goal was to identify factors that play a role in false clinical diagnosis of small deep infarcts.

METHODS

In 350 prospectively registered patients with a first supratentorial ischemic stroke, we clinically differentiated between lacunar and nonlacunar syndromes. Using computed tomography (CT), we distinguished small deep and territorial infarcts and also recorded leukoaraiosis and asymptomatic infarcts. Degree of initial handicap, potential source of cardioembolic stroke, and hypertension were also noted.

RESULTS

One hundred forty-seven patients had a lacunar and 203 a nonlacunar syndrome. Forty-two (12%) had a lesion visualized by CT that was compatible with a recent infarct but was considered inappropriate for the clinical syndrome: nineteen had a nonlacunar syndrome but a small deep infarct, and 23 had a lacunar syndrome but a territorial infarct. Patients with a nonlacunar syndrome but a small deep infarct were more severely disabled (a modified Rankin scale rating of 5) (odds ratio [OR], 4.31; 95% confidence interval [CI], 1.25 to 14.88) and had a cardioembolic source (OR, 4.07; 95% CI, 1.04 to 15.95), leukoaraiosis (OR, 3.79; 95% CI, 1.32 to 10.05), or asymptomatic infarcts visualized by CT (OR, 4.13; 95% CI, 1.45 to 11.71) compared with 124 patients with a correctly diagnosed small deep infarct. Twelve of 19 patients with a nonlacunar syndrome but a small deep infarct had a lesion in the left hemisphere, and 9 of these 12 had "aphasia." Patients with a lacunar syndrome but a territorial infarct more often had a cardioembolic source (OR, 4.02; 95% CI, 1.15 to 14.03) and a pure motor syndrome (OR, 4.52; 95% CI, 1.55 to 13.18) than those with lacunar syndrome but a small deep infarct, although 21 (91%) were in the right hemisphere. Of the first 103 patients with lacunar stroke diagnosed by two of the study neurologists, 5 had an inappropriate lesion compared with 14 of the later 40 diagnosed by colleagues without a specific interest in cerebrovascular diseases (OR, 0.09; 95% CI, 0.03 to 0.26).

CONCLUSIONS

(1) Diagnosis of lacunar syndromes should not be influenced by deficit severity or the presence of a potential cardiac source of embolism. (2) Speech disorders should carefully be classified. (3) Routine tests of nondominant higher functions may be inadequate. (4) Doctors interested in cerebrovascular neurology have a lower failure rate in differentiating small deep infarcts from territorial infarcts than those less well-trained or interested in neurology. (5) Among the lacunar syndromes, pure motor syndrome may be the least specific predictor of a small deep infarct.

Two clinically distinct lacunar infarct entities? A hypothesis

BACKGROUND AND PURPOSE

We investigated the hypothesis that patients with one or more asymptomatic lacunar infarcts and those with only one symptomatic lacunar infarct represent two clinically distinct lacunar infarct entities.

METHODS

In a prospective series of 100 lacunar infarct patients, univariate and multivariate logistic regression analysis was performed on clinical features, vascular risk factors, and leukoaraiosis between patients with and without asymptomatic lacunar infarcts.

RESULTS

Patients with asymptomatic lacunar infarcts had hypertension significantly more often (71% versus 43%; [crude] odds ratio, 3.31; 95% confidence intervals, 1.16-9.43; p < 0.05) and had leukoaraiosis significantly more often (71% versus 19%; [crude] odds ratio, 10.67; 95% confidence intervals, 3.81-32.10; p < 0.001) than those with only a symptomatic lacunar infarct. After multivariate logistic regression analysis, only leukoaraiosis was significantly associated with the presence of asymptomatic lacunar infarcts. The asymptomatic lacunar infarcts differed in location, involved vascular territory, and volume from the symptomatic infarcts.

CONCLUSIONS

Two distinct lacunar infarct entities might be broadly distinguished during life: lacunar infarct patients with a single, symptomatic lacunar infarct, and patients with multiple lacunar infarcts and a high frequency of hypertension and leukoaraiosis, in which the underlying small-vessel vasculopathy might be different.

Magnetic resonance imaging of progressive hydrosyringomyelia in two patients with meningomyelocele

Two patients who postoperatively developed extensive multiseptated hydrosyringomyelia following surgical repair of a lumbal meningomyelocele are reported. Since MRI has been available, an increasing number of reports showed that MRI is useful in the diagnosis of hydrosyringomyelia. Hydrosyringomyelia can be considered as a dysraphic lesion. Etiology and pathogenesis of hydrosyringomyelia are still not fully understood. Probably arachnoidal adhesions and cord tethering in both patients may be potential factors in producing cystic degeneration of the underlying structure secondary to ischemia.

Large striatocapsular infarcts: clinical presentation and pathogenesis in comparison with lacunar and cortical infarcts

In a well-defined prospective series of 247 patients with a first-ever supratentorial brain infarct, 15 patients (6%; 95% confidence interval 3-9%) had a large striatocapsular infarct. Twelve (80%) had signs of cortical dysfunction, whereas risk factor profile, frequency of significant carotid stenosis, and frequency of potential cardioembolic sources did not differ between patients with striatocapsular and those with cortical infarction. However, patients with striatocapsular infarction more frequently had potential cardioembolic source and significant carotid stenosis than patients with lacunar infarction. Our findings show that large striatocapsular infarcts differ from lacunar infarcts with regard to both presenting signs and symptoms, and pathogenesis, whereas they resemble infarcts involving the cortex. Such patients should therefore be managed and treated as patients with cortical infarction.

Lacunar infarcts. Pathogenesis and validity of the clinical syndromes

BACKGROUND AND PURPOSE

In this study, we investigated the lacunar hypothesis to answer three questions: 1) Is the lacunar syndrome valid for diagnosing lacunar infarction? 2) What is the frequency of potential cardiac versus carotid sources of embolism in patients with lacunar versus cortical infarct? 3) What is the frequency of vascular risk factors in these two groups of patients?

METHODS

The study was performed in a well-defined prospective series of 103 patients with a first-ever lacunar infarct and 144 other patients with a first-ever infarct involving the cortex.

RESULTS

Sensitivity and specificity of the lacunar syndromes in diagnosing lacunar infarction were 95% and 93%, respectively. Positive and negative predictive values of diagnosing lacunar infarction in patients with lacunar syndromes were 90% and 97%, respectively. Risk factor analysis showed no differences for either group of cerebral infarction. A cardiac source of embolism was significantly less frequent in patients with lacunar infarction (odds ratio = 0.32, 95% confidence interval = 0.17-0.61, p less than 0.001). Significant carotid stenosis (diameter reduction greater than or equal to 50%) was also less frequent in patients with lacunar infarction (odds ratio = 0.35, 95% confidence interval = 0.16-0.76, p less than 0.001).

CONCLUSIONS

These findings show that the lacunar syndrome is an excellent clinical test for diagnosing lacunar infarction and that cardiac and carotid embolism are unlikely causes of lacunar infarction, supporting the hypothesis that lacunar infarcts are usually caused by small vessel disease.

Discrete lesions in the sensorimotor control system. A clinical-topographical study of lacunar infarcts

In 50 patients with computed tomography-verified small, deep, lacunar, infarcts from a prospective stroke registry, we studied the lesion site in relationship with the clinical syndromes pure motor stroke, sensorimotor stroke and ataxic hemiparesis. Seventy per cent (95% confidence interval: 57-83%) of the lesions were located in the posterior limb of the internal capsule or adjacent paraventricular region, affecting the corticospinal tract in pure motor stroke, as well as the thalamocortical tract in sensorimotor stroke, and the cerebellar (dentato(rubro)thalamocortical and corticopontocerebellar) pathways in ataxic hemiparesis. This most frequently involved area is supplied by the anterior choroidal artery, indicating that this artery is the predominant deep, penetrating artery involved in small vessel disease causing lacunar stroke syndromes.

Ataxic hemiparesis following thalamic infarction

We describe a 73-year-old man with ataxic hemiparesis following infarction of the ventrolateral nucleus of the thalamus demonstrated by computed tomography and magnetic resonance imaging. Cerebellar ataxia was most likely due to interruption of the dentatorubrothalamocortical fibers at the level of the injured ventrolateral nucleus. Hemiparesis was probably caused by local edema compressing the corticospinal tract in the adjacent posterior limb of the internal capsule. We believe this to be the first reported case of classic ataxic hemiparesis following thalamic infarction.

[An unusual sequela of a frequently occurring neurologic disorder: delirium caused by brain infarct]

Six patients are described with delirium after cerebral infarction. Five had a right-sided parietal infarction with involvement of the inferior parietal lobule. One patient presented with a right-sided medial temporo-occipital infarction. The mild neurological signs were dominated by the delirium. The outcome was good in all patients. Delirium after cerebral infarction is probably caused by injury to one of the convergence sites for integration of sensory information with disturbance of the directed attention to relevant stimuli. These sites are localized in the right parietal cortex and the medial temporo-occipital regions. This cause of delirium is probably compatible with the supposition that the right hemisphere is mainly responsible for the distribution of directed attention within extrapersonal space. The importance of an accurate neurological examination in delirious patients is emphasized.

Von Recklinghausen neurofibromatosis (VRNF) and pregnancy. A single case study

A case of Von Recklinghausen neurofibromatosis (VRNF) with progression during two pregnancies and obstetrical complications is described to illustrate the effect of pregnancy on VRNF and vice versa. The interaction between VRNF and pregnancy is discussed. The obstetrical complications and progression of VRNF lesions during pregnancy necessitate close follow-up of these patients by neurologist and obstetrician.

The conservative treatment of patients presenting with Grisel's syndrome

Two cases of Grisel's syndrome are described to demonstrate that early recognition of this condition allows effective conservative treatment. To explain the good response to early conservative treatment, a combination of hypotheses is proposed.