Voxel-based lesion symptom mapping analysis for dysphagia in stroke patients with isolated cerebellar lesions.

Because the cerebellum plays a role in motor coordination, timing, sequencing, and feedback, it is hypothesized to be involved in swallowing-related functions. The role of the cerebellum in deglutition has become increasing evident, but the exact nature of this role remains inconclusive because of limited data from pure cerebellar lesions. Therefore, we conducted location analysis in isolated cerebellar lesions to complement previous findings and provide additional information. We reviewed 40 stroke patients with isolated cerebellar lesion. Lesion location and volume were measured on brain magnetic resonance images. We generated statistical maps of lesions related to VDS using voxel-based lesion symptom mapping (VLSM). We also created an overlay map of subgroups according to VDS score, those who have low risk and those who have high risk. Patients with cerebellar lesion had difficulty swallowing, both in the oral and pharyngeal phases. Multivariate analysis of cognitive function was selected as an independent predictor. In the group of high-risk patients, the overlay map showed some bilateral asymmetry, with a wider distribution in the left hemisphere and involvement of deep cerebellar nuclei. Using VLSM, we found that lesion location was associated with dysphagia. Although these results were not statistically significant, they showed a lesion pattern with predominant distribution in the left posterior lobe. Our results suggest that damage to the posterior lobe of the left cerebellum tends be related to severity of dysphagia in patients with isolated cerebellar lesion.

Prestroke VO2max by the Jurca prediction index as a predictor of functional outcomes in stroke patients.

BACKGROUND: Prestroke cardiopulmonary fitness (CPF) levels can affect post-stroke respiratory function and functional status, including gait and activities of daily living (ADL). OBJECTIVES: To investigate the prestroke CPF level measured by the Jurca prediction index as a predictor of functional outcomes after stroke and to evaluate the association between estimated prestroke CPF and respiratory function after stroke. METHODS: This was a prospective observational study involving 71 inpatients with first-time subacute stroke between June 2017 and July 2019. The prestroke VO2max was assessed using the Jurca prediction index, which was calculated from age, sex, resting heart rate, body mass index, and physical activity level. Linear regression analysis was performed to determine the relationship between the Jurca prediction index, functional outcomes, pulmonary functions, and cough strength variables. RESULTS: The estimated prestroke VO2max was significantly associated with the post-stroke Berg Balance Scale (ß=1.199, P<0.001), Trunk Impairment Scale (ß=0.308, P=0.006), and Functional Independence Measure score (ß=1.102, P=0.004) at admission, and these relationships remained significant at the follow-up evaluation after 1 month of conventional rehabilitation (P<0.001). Among the respiratory function variables, only peak cough flow (PCF) (ß=0.696, P=0.037) was significantly associated with the estimated prestroke VO2max. CONCLUSIONS: Prestroke CPF likely affects the stability of core muscles that are related to PCF and the functional status, including balance function and ADL after stroke. Regular exercise to increase the CPF level should be encouraged in patients with risk factors for stroke, not only for primary prevention but also for functional improvement after stroke.

The Impact of Cortical Cerebral Microinfarcts on Functional Outcomes in Patients With Ischemic Stroke.

The present study examined cortical cerebral microinfarcts (CMIs) on a 3T magnetic resonance imaging and investigated the impact of CMIs on the comprehensive functional outcomes during the post-stroke rehabilitation period. Patients with acute phase of first-ever ischemic stroke were retrospectively recruited (n = 62) and divided into 2 groups with and without CMIs. Clinical parameters including age, sex, stroke lesion laterality, location, the National Institutes of Health Stroke Scale score, as well as history of hypertension, dyslipidemia, diabetes mellitus, and smoking were obtained. Functional outcomes were assessed twice at baseline and one month later with the Korean version of the Mini-Mental State Examination, the Berg balance scale (BBS), and the functional independence measure. Partial correlation and multiple linear regression analyses were used to examine the relationship between the presence of CMIs and the change in functional outcomes. At least one CMI was reported in 27 patients, who were older (p = 0.043). The presence of CMIs was significantly associated with functional impairment in all 3 functional outcomes, after controlling for confounding factors (p < 0.05). CMIs might contribute to poor functional outcomes during the post-stroke rehabilitation period. These results suggest that CMIs should be considered when establishing rehabilitation treatment strategies or making a prognosis.

Hemidystonia after Pontine Hemorrhage Successfully Treated with Pharmacotherapy and Intensive Rehabilitation: a Case Report.

Dystonia is a movement disorder characterized by involuntary contraction of muscles resulting in repetitive or twisting movements. Dystonia is generally caused by basal ganglia dysfunction. Recent studies have reported an association between dystonia and brainstem disorders. However, the pathological mechanism is uncertain, and detailed management strategies are limited. Here, we report a case of hemidystonia with abnormal posture and impaired proprioception after pontine hemorrhage that was effectively treated with pharmacotherapy combined with early intensive comprehensive rehabilitation. A 45-year-old man presented with abnormal posture and dystonic movement in the right hand and foot after a pontine hemorrhagic stroke. Pharmacotherapy with clonazepam and benztropine was administered, and comprehensive rehabilitation programs were implemented intensively from the early stages of symptom onset. After 3 months, the patient was able to walk independently, go up and down a few stairs without the use of a handrail, and was able to perform activities of daily living with minimal assistance.

Can Pulmonary Function Testing Predict the Functional Outcomes of Poststroke Patients?: An Observational Study.

OBJECTIVE: Patients with stroke may experience pulmonary dysfunction that reduces movement of the muscles involved in postural control and respiration. This study aimed to evaluate the relationship between postural control and respiratory muscle strength using pulmonary function testing. We sought to identify the respiratory function parameters that predict the functional outcomes patients with stroke at discharge. DESIGN: We prospectively recruited 52 patients with first-ever stroke within 6 mos of onset. Peak cough flow, maximal inspired pressure, maximal expired pressure, forced vital capacity, and forced expiratory volume in 1 sec were measured at baseline and after 4 wks of rehabilitation. The primary outcomes were trunk balance measured using the Trunk Impairment Scale and functional outcomes measured using the Berg Balance Scale and functional independence measure. RESULTS: The initial peak cough flow, forced vital capacity, and forced expiratory volume in 1 sec values correlated with the Trunk Impairment Scale scores at admission; only the initial peak cough flow and forced vital capacity were predictive factors for the final Trunk Impairment Scale score. Multivariable linear regression analysis showed that the initial peak cough flow was a significant predictive factor for follow-up test scores at discharge: Berg Balance Scale (P < 0.001) and functional independence measure (P < 0.025). CONCLUSION: Initial respiratory function was significantly correlated with trunk balance and the functional outcomes.

Efficacy and tolerability of desensitization in the treatment of delayed drug hypersensitivities to anti-tuberculosis medications.

BACKGROUND: Delayed drug hypersensitivity to first-line anti-tuberculosis medication is a major challenge in tuberculosis treatment. OBJECTIVE: This study was performed to investigate the efficacy/tolerability of desensitization therapy in treatment of first-line anti-tuberculosis medication hypersensitivity and the usefulness of immunologic evaluation therein. METHODS: This study was conducted as a prospective, observational cohort study. Subjects who experienced hypersensitivity reactions, including maculopapular exanthema (MPE) and drug reaction with eosinophilia and systemic symptoms (DRESS), to first-line anti-tuberculosis medications (isoniazid [INH], ethambutol [EMB], rifampin [RFP], and pyrazinamide [PZA]) were enrolled. Patch, intradermal, lymphocyte transformation, and oral provocation tests were performed to determine culprit drugs, which were desensitized with rapid and graded challenge protocols. Breakthrough reactions (BTRs) during or after desensitization were assessed. RESULTS: In total, 31 desensitization treatments (INH, 8; EMB, 8; RFP, 11; PZA, 4) to 12 patients (8 with MPE and 4 with DRESS) were performed. The overall success rate of desensitization was 80.7%. All the study subjects except one completed the full course of anti-tuberculosis treatment. The overall BTR free rate was 64.5%. Sixteen (80%) treatments for MPE and four (36.4%) for DRESS were BTR free (P = 0.023). Drugs that were positive on any two of three immunologic studies showed significantly high BTR rates (P = 0.014), although this was not correlated with desensitization failure rate. CONCLUSION: Rapid desensitization therapy to multiple anti-tuberculosis medications for delayed drug hypersensitivity was safe and successful. Combination of multiple immunologic evaluations may predict BTR although it needs validation in larger studies.

Manual function of the unaffected upper extremity can affect functional outcome after stroke.

Traditionally, motor deficits of ipsilesional side, generally considered as the unaffected side, have been investigated less and the influence of the impairment is unknown. To evaluate the association between the manual function test (MFT) of nonparetic limb and poststroke functional outcome. We conducted a retrospective analysis of 71 hemiplegic patients with stroke. MFT on both sides was routinely measured at admission and 1 month later after admission by an experienced occupational therapist. The parameters of functional outcome after stroke were measured with the total score of functional independence measure (FIM) and the self-care subscore of FIM. Age, initial cognitive function, and MFT of the affected hand and unaffected hand were each significant factors for independently predicting short-term functional outcome after stroke. Linear regression analysis showed that initial MFT score of unaffected side is a significant predictor for 1 month follow-up subscore FIM (P<0.0001) and total FIM score (P<0.0001). Our findings suggests that initial MFT score of the nonparetic side has a significant correlation with functional outcome. Therefore, it is important to conduct MFT on the nonparetic side as well as the paretic side. Furthermore, it is necessary to undergo rehabilitation therapy on the nonparetic side.

Sleep disturbances negatively affect balance and gait function in post-stroke patients.

BACKGROUND: Impaired gait function after stroke contributes strongly to overall patient disability. Recently, sleep disturbance was reported to negatively affect functional recovery after stroke. OBJECTIVE: The aim of this study was to identify the impact of sleep disturbance on balance and gait function in stroke patients. METHODS: We retrospectively reviewed 140 patients with first-ever stroke. The patients were divided into two groups according to the presence of sleep disturbances, and differences in characteristics, such as demographic information, lesion factors, initial balance, and gait function. Lesion volume was measured on magnetic resonance images. Linear regression analyses were performed to examine predictors of balance and gait function after a 1-month rehabilitation program. RESULTS: Of the 140 patients, 35 had sleep disturbance (25%). The patients with sleep disturbance were older than those without. Patients who had sleep disturbance had worse balance and gait function. BBS and FAC were also predicted by the initial BBS and sleep disturbance. The 10-m velocity was strongly associated with initial BBS, onset duration, and the presence of sleep disturbance. CONCLUSIONS: Our study showed that sleep disturbances negatively affected functional outcomes, especially balance and gait function. Therefore, sleep problems should be controlled to improve outcomes in stroke patients.

Lesions Responsible for Delayed Oral Transit Time in Post-stroke Dysphagia.

INTRODUCTION: Some stroke patients show oral phase dysphagia, characterized by a markedly prolonged oral transit time that hinders oral feeding. The aim of this study was to clarify the clinical characteristics and lesions responsible for delayed swallowing. METHODS: We reviewed 90 patients with stroke. The oral processing time plus the postfaucial aggregation time required to swallow semisolid food was assessed. The patients were divided into two groups according to oral transit time, and we analyzed the differences in characteristics such as demographic factors, lesion factors, and cognitive function. Logistic regression analyses were performed to examine the predictors of delayed oral transit time. Lesion location and volume were measured on brain magnetic resonance images. We generated statistic maps of lesions related to delayed oral phase in swallowing using voxel-based lesion symptom mapping (VLSM). RESULTS: The group of patients who showed delayed oral transit time had significantly low cognitive function. Also, in a regression model, delayed oral phase was predicted with low K-MMSE (Korean version of the Mini Mental Status Exam). Using VLSM, we found the lesion location to be associated with delayed oral phase after adjusting for K-MMSE score. Although these results did not reach statistical significance, they showed the lesion pattern with predominant distribution in the left frontal lobe. CONCLUSION: Delayed oral phase in post-stroke patients was not negligible clinically. Patients' cognitive impairments affect the oral transit time. When adjusting it, we found a trend that the lesion responsible for delayed oral phase was located in the left frontal lobe, though the association did not reach significance. The delay might be related to praxis function.

Long-term Results of Bladder Neck Suspension: Valsalva Leak Point Pressure as a Predictive Factor of Surgical Outcome in Female Stress Urinary Incontinence / 대한비뇨기과학회지

PURPOSE: We retrospectively reviewed the cases of female stress incontinence at our institution to evaluate the value of VLPP(valsalva leak point pressure) in predicting surgical outcome of BNS(bladder neck suspension). MATERIALS AND METHODS: Ninety-four female patients with stress incontinence who underwent BNS after urodynamic study were investigated retrospectively. Surgical outcomes and patient?s satisfaction were assessed by questionnaires. Surgical outcomes were then analyzed in relation to VLPP and MUCP(maximal urethral closing pressure). Follow-up averaged 27 months. RESULTS: Mean age was 50 years and mean parity was 2.9. Urinary incontinence completely disappeared in 36 patients(38.2%), significantly improved in 29 patients(30.9%), failed in 29 patients(30.9%). There was a significant relationship between VLPP and failure rate. The failure rate was 44.8%(p=0.015) in patients with low VLPP(< or =60cmH2O) and 36.4%(p=0.67) with low MUCP(< or =20cmH2O). CONCLUSIONS: We conclude that VLPP is superior to MUCP in predicting surgical outcome after bladder neck suspension for female stress incontinence. This study demonstrates that bladder neck suspension is not a effective procedure for surgical correction of intrinsic sphincter deficiency, therefore another treatment modality should be considered. VLPP is a useful guide in selecting appropriate surgical modality on female stress urinary incontinence.