Post-stroke Pneumonia Research Articles

Efficacy and safety of ozone therapy administered by autologous blood transfusion for acute ischemic stroke: study protocol for a multi-center open-label large-sample parallel randomized controlled trial

Background: There is still a lack of effective treatments for acute ischemic stroke. Our pre-clinical studies suggest that ozone therapy administered by autologous blood transfusion is a convenient and safe treatment for ischemic stroke, and is popular with patients, but its therapeutic benefits are not clear. We hypothesized that ozone therapy administered by autologous blood transfusion for ischemic stroke is safe and effective, and propose a protocol for a prospective, multi-center, open-label, large-sample, parallel, randomized, non-blinded controlled trial. Methods/Design: This will be a multi-center, open-label, large-sample, parallel, randomized controlled trial. We intend to recruit 5,000 patients with acute ischemic stroke in 30 centers (including General Hospital of Shenyang Military Region, China). Patients will be randomly allocated to a control group (n = 2,500; conventional stroke therapy) or an ozone therapy group (n = 2,500; ozone therapy administered in addition to conventional therapy). The primary outcome will be a modified Rankin Scale score 0-2 at 90 days. Secondary outcomes will be National Institute of Health Stroke Scale score at 14 days, blood lipid and glucose concentrations and coagulation function at 14 days, and the incidence of post-stroke pneumonia, recurrent stroke and other vascular events in the first 90 days after stroke. Discussion: We hope that our results will illuminate the therapeutic benefits of ozone therapy administered by autologous blood transfusion for acute ischemic stroke. Trial registration: This trial was registered at Chinese Clinical Trial Registry (registration No. ChiCTR-ICR-15007093) on 18 September 2015.

Impact of Diabetes on Stroke Risk and Outcomes: Two Nationwide Retrospective Cohort Studies.

Several limitations existed in previous studies which suggested that diabetic patients have increased risk of stroke. We conducted this study to better understand the stroke risk and poststroke outcomes in patients with diabetes.From the claims data of Taiwan's National Health Insurance, we identified 24,027 adults with new-diagnosed diabetes and 96,108 adults without diabetes between 2000 and 2003 in a retrospective cohort study. Stroke events (included hemorrhage, ischemia, and other type of stroke) during the follow-up period of 2000 to 2008 were ascertained and adjusted risk of stroke associated with diabetes was calculated. A nested cohort study of 221,254 hospitalized stroke patients (included hemorrhage, ischemia, and other type of stroke) between 2000 and 2009 was conducted. Adjusted odds ratios (ORs) and 95% confidence intervals (CIs) were calculated for adverse events after stroke hospitalization in patients with and without diabetes.The incidences of stroke in cohorts with and without diabetes were 10.1 and 4.5 per 1000 person-years, respectively. During the follow-up period, diabetic patients had an increased risk of stroke (adjusted hazard ratio: 1.75; 95% CI: 1.64–1.86) than those without diabetes. Associations between diabetes and stroke risk were significant in both sexes and all age groups. Previous diabetes was associated with poststroke mortality (OR: 1.33; 95% CI: 1.19–1.49), pneumonia (OR: 1.30; 95% CI: 1.20–1.42), and urinary tract infection (OR: 1.66; 95% CI: 1.55–1.77). The impact of diabetes on adverse events after stroke was investigated particularly in those with diabetes-related complications.Diabetes was associated with stroke risk, and diabetic patients had more adverse events and subsequent mortality after stroke.

Outcomes after Stroke in Patients with Previous Pressure Ulcer: A Nationwide Matched Retrospective Cohort Study

Factors associated with poststroke adverse events were not completely understood. The purpose of this study was to investigate whether stroke patients with previous pressure ulcers had more adverse events after stroke. Using the claims data from Taiwan's National Health Insurance Research Database, we conducted a retrospective cohort study matched by propensity score. Three thousand two first-ever stroke patients with previous pressure ulcer and 3002 first-ever stroke patients without pressure ulcer were investigated between 2002 and 2009. Adjusted odds ratios (ORs) and 95% confidence intervals (CIs) of complications and 30-day mortality after stroke associated with previous pressure ulcer were calculated in the multivariate logistic regressions. Patients with pressure ulcer had significantly higher risk than control for poststroke urinary tract infection (OR: 1.56, 95% CI: 1.38-1.78), pneumonia (OR: 1.35, 95% CI: 1.16-1.58), gastrointestinal bleeding (OR: 1.31, 95% CI: 1.04-1.66), and epilepsy (OR: 1.84, 95% CI: 1.83-1.85). Stroke patients with pressure ulcer had increased 30-day poststroke mortality (OR: 2.01, 95% CI: 1.55-2.61), particularly in those treated with debridement (OR: 2.87, 95% CI: 1.85-4.44) or high quantity of antibiotics (OR: 4.01, 95% CI: 2.10-7.66). Pressure ulcer was associated with poststroke mortality in both genders and patients aged 60 years or older. This study showed increased poststroke complications and mortality in patients with previous pressure ulcer, which suggests the urgent need for monitoring stroke patients for pressure ulcer history.

Can Prophylactic Antibiotics Reduce Poststroke Pneumonia in Patients with Dysphagia

Pneumonia is the most common medical complication after stroke, with an estimated incidence ranging from 5% to 26%. It has been reported to increase

Prophylactic antibiotics after acute stroke for reducing pneumonia in patients with dysphagia (STROKE-INF): a prospective, cluster-randomised, open-label, masked endpoint, controlled clinical trial

Post-stroke pneumonia is associated with increased mortality and poor functional outcomes. This study assessed the effectiveness of antibiotic prophylaxis for reducing pneumonia in patients with dysphagia after acute stroke. We did a prospective, multicentre, cluster-randomised, open-label controlled trial with masked endpoint assessment of patients older than 18 years with dysphagia after new stroke recruited from 48 stroke units in the UK, accredited and included in the UK National Stroke Audit. We excluded patients with contraindications to antibiotics, pre-existing dysphagia, or known infections, or who were not expected to survive beyond 14 days. We randomly assigned the units (1:1) by computer to give either prophylactic antibiotics for 7 days plus standard stroke unit care or standard stroke unit care only to patients clustered in the units within 48 h of stroke onset. We did the randomisation with minimisation to stratify for number of admissions and access to specialist care. Patient and staff who did the assessments and analyses were masked to stroke unit allocation. The primary outcome was post-stroke pneumonia in the first 14 days, assessed with both a criteria-based, hierarchical algorithm and by physician diagnosis in the intention-to-treat population. Safety was also analysed by intention to treat. This trial is closed to new participants and is registered with isrctn.com, number ISRCTN37118456. Between April 21, 2008, and May 17, 2014, we randomly assigned 48 stroke units (and 1224 patients clustered within the units) to the two treatment groups: 24 to antibiotics and 24 to standard care alone (control). 11 units and seven patients withdrew after randomisation before 14 days, leaving 1217 patients in 37 units for the intention-to-treat analysis (615 patients in the antibiotics group, 602 in control). Prophylactic antibiotics did not affect the incidence of algorithm-defined post-stroke pneumonia (71 [13%] of 564 patients in antibiotics group vs 52 [10%] of 524 in control group; marginal adjusted odds ratio [OR] 1·21 [95% CI 0·71-2·08], p=0·489, intraclass correlation coefficient [ICC] 0·06 [95% CI 0·02-0·17]. Algorithm-defined post-stroke pneumonia could not be established in 129 (10%) patients because of missing data. Additionally, we noted no differences in physician-diagnosed post-stroke pneumonia between groups (101 [16%] of 615 patients vs 91 [15%] of 602, adjusted OR 1·01 [95% CI 0·61-1·68], p=0·957, ICC 0·08 [95% CI 0·03-0·21]). The most common adverse events were infections unrelated to post-stroke pneumonia (mainly urinary tract infections), which were less frequent in the antibiotics group (22 [4%] of 615 vs 45 [7%] of 602; OR 0·55 [0·32-0·92], p=0·02). Diarrhoea positive for Clostridium difficile occurred in two patients (<1%) in the antibiotics group and four (<1%) in the control group, and meticillin-resistant Staphylococcus aureus colonisation occurred in 11 patients (2%) in the antibiotics group and 14 (2%) in the control group. Antibiotic prophylaxis cannot be recommended for prevention of post-stroke pneumonia in patients with dysphagia after stroke managed in stroke units. UK National Institute for Health Research.

Effect of beta-blocker therapy on the risk of infections and death after acute stroke--a historical cohort study.

BackgroundInfections are a frequent cause for prolonged hospitalization and increased mortality after stroke. Recent studies revealed a stroke-induced depression of the peripheral immune system associated with an increased susceptibility for infections. In a mice model for stroke, this immunosuppressive effect was reversible after beta-blocker administration. The aim of our study was to investigate the effect of beta-blocker therapy on the risk of infections and death after stroke in humans.Methods625 consecutive patients with ischemic or hemorrhagic stroke, admitted to a university hospital stroke unit, were included in this historical cohort study. The effect of beta-blocker therapy on post-stroke pneumonia, urinary tract infections and death was investigated using multivariable Poisson and Cox regression models.Results553 (88.3%) patients were admitted with ischemic stroke, the remaining 72 (11.7%) had a hemorrhagic stroke. Median baseline NIHSS was 8 (IQR 5–16) points. 301 (48.2%) patients received beta-blocker therapy. There was no difference in the risk of post-stroke pneumonia between patients with and without beta-blocker therapy (Rate Ratio = 1.00, 95%CI 0.77–1.30, p = 0.995). Patients with beta-blocker therapy showed a decreased risk for urinary tract infections (RR = 0.65, 95%CI 0.43–0.98, p = 0.040). 7-days mortality did not differ between groups (Hazard Ratio = 1.36, 95%CI 0.65–2.77, p = 0.425), while patients with beta-blocker therapy showed a higher 30-days mortality (HR = 1.93, 95%CI 1.20–3.10, p = 0.006).ConclusionsBeta-blocker therapy did not reduce the risk for post-stroke pneumonia, but significantly reduced the risk for urinary tract infections. Different immune mechanisms underlying both diseases might explain these findings that need to be confirmed in future studies.

Causes of death among persons who survive an acute ischemic stroke.

Stroke and especially its complications are a leading cause of death. Despite reduced morbidity in some developed countries, mortality in stroke patients is still high worldwide. In the past decades, treatment of acute stroke has focused on early intervention, such as revascularization and cerebral edema prevention. However, long-term clinical observations indicate that poststroke pneumonia, cardiovascular complications, and vascular embolism are the major reasons for the increased death rate after stroke. Few evidence-based data are available currently to guide the management of these complications. Thus, systematic studies of these adverse events are essential and urgent to improve survival after stroke.

Abstract T P293: Determinants of Early Withdrawal of Care in Patients Who Die During Index Hospitalization for Acute Ischemic Stroke

Introduction: CMS recently announced plans to report risk-standardized stroke mortality. Decisions to withdraw medical care after acute ischemic stroke are based on numerous factors, not just the severity of the incident stroke. Withdrawal of care decisions have the potential to confound these adjusted mortality rates. We investigated factors associated with early withdrawal of care in patients hospitalized with AIS. Methods: We used our institutional GWTG database (1474 consecutive stroke inpatients from 12/2009 - 12/2012) to identify 176 consecutive in-hospital mortalities; of these, 100 patients were transitioned to comfort care during hospitalization. Chart review was performed on these 100 patients to identify factors associated with early (&lt; 5 days) withdrawal of care. Results: Seventy-eight patients (78%) had early withdrawal of care. Table 1 shows the comparison of patients with early (&lt;5 days) versus late (≥ 5 days) withdrawal of care decisions. As shown, Early-CMO patients were younger, and less often were Hispanic, had a college level or higher education, and annual income &gt;$100,000. They had more often expressed a DNR request, had placed limits on life sustaining measures prior to admission or had a known health care proxy (84% vs. 68%). They had pre-existing comorbidities of prior MI, atrial fibrillation, cancer and dementia. They had slightly higher NIHSS scores, and lower rates of thrombolysis. Early-CMO patients had lower rates of post-stroke pneumonia. Conclusion: Several non-clinical variables appear to be associated with early withdrawal of care decisions and contribute substantially to in-hospital stroke mortality. Many of these factors are non-modifiable, and the association with pneumonia may be confounded by the reduced opportunity to develop pneumonia in cases of very early death. Given the vigorous debate about preventable stroke mortality and public reporting, these data suggest the need for more complex mortality risk models.

Risk factors for the onset of aspiration pneumonia among stroke patients in the recovery stage

Post-stroke aspiration pneumonia is one of the most common complications among stroke patients. Although the onset of aspiration pneumonia is caused by a disruption of the balance between invasion (the type and amount of oral flora and aspiration) and host resistance (the protective airway reflex and immune function), several previous studies have focused on invasion, such as aspiration and dysphagia. In this study, we examined the importance of the host resistance to aspiration pneumonia among stroke patients with dysphagia. The study subjects included 76 stroke patients (mean age, 74.7±8.4 years) with dysphagia chosen from 175 stroke patients who were newly admitted to four rehabilitation hospitals. We divided the subjects into two groups based on the onset of pneumonia during the period of admission and compared their status. Ten patients (13.2%) developed pneumonia at the hospital, and all of the affected patients were over 65 years old. Significant differences existed between the two groups with respect to the gender, activity level, albumin level, nutrition method and severity of dysphagia (p<0.05). Our study revealed that recumbency, malnutrition, tube feeding, severe dysphagia and female sex were risk factors for pneumonia. In particular, dysphagia was closely associated with aspiration pneumonia. Moreover, host resistance factors, such as recumbency and malnutrition, also play important roles in the development of aspiration pneumonia.

Sergančiųjų poinsultine pneumonija ir uroinfekcija klinikinių charakteristikų, gydymo trukmės ir kaštų sąsajos

The purpose of the study was to identify relationships between clinical characteristics, time and costs of the treatment in patients with post-stroke pneumonia and uro-infection. The retrospective analysis included 256 patients with acute stroke, who were treated in the stroke unit of Klaipėda university hospital in 2010. Medical records of patients with stroke (form 003/a) were used as a data source. Brain computer tomography was applied to all patients included in the study. Pneumonia and urinary tract infection diagnosis (ICD-10, codes J18 and N39.0, respectively) was established based on the clinical, laboratory and radiological analysis and the appropriate specialist’s consultation. The statistical analysis was performed using SPSS 15. The chi-square (χ2) test and Spearman correlation coefficient (r) were used to determine the relationship between characteristics. The linkage of complications to the type of stroke, gender, age and duration of treatment was established by applying logistic regression. The data difference was statistically significant at p <0.05. The mean age of patients included in the study was 71.3 ± 11.9 years. It was found in the course of the study that 32 patients (12.5 percent) were diagnosed with post-stroke pneumonia and 6 patients (3.2 percent) with urinary tract infection, accordingly. Older age appeared to be linked to the development of after stroke pneumonia OR = 1.08 (1.04 to 1.14), p <0.001. Urinary tract infection, regardless of gender and age, was associated with hemorrhagic stroke (OR = 9.6, p = 0.027). A median of 9 bed days was observed, range 1 to 22 days. Pneumonia and urinary tract infection increased the length of inpatient treatment (median 13 days, range 7 to 22 days). The treatment duration of patients with pneumonia and urinary tract infection exceeded one and a half times that of patients without complications [OR = 1.52 (1.29 to 1.78) and 1.51 (1.17 to 1.94), respectively]. Significantly higher treatment costs per patient were observed in patients with pneumonia (43 percent above the average costs for the treatment of patients without complications, p <0.001) and urinary tract infection (51 percent above the treatment of patients without complications) (p=0,002) compared with treatment costs of patients who had no complications. Conclusions: Post-stroke pneumonia and urinary tract infection (12.5 and 3.2 percent, respectively) are common complications of acute stroke, the frequency of which depends on the stroke severity. The treatment duration of patients who had been diagnosed with pneumonia and urinary tract infection exceeded one and a half times that of patients without complications. Treatment costs for patients with post-stroke pneumonia and uro-infection are significantly higher compared to patients for whom these complications were not diagnosed. Effective prevention and management of early complications after acute stroke is needed. doi:10.5200/sm-hs.2013.083

Performance measures for in-hospital care of acute ischemic stroke in public hospitals in Chile

BackgroundThe aim of this study were to describe acute care of ischemic stroke patients and adherence to performance measures, as well as the outcomes of these events, in a sample of patients treated in public hospitals in Chile.MethodsWe retrospectively reviewed the medical charts of patients with ischemic stroke from a sample of seven public hospitals in the Metropolitan Region of Santiago. We analyzed adherence to the following evidence-based measures: clinical evaluation at admission, use of intravenous thrombolysis, dysphagia screening and prescription of antithrombotic therapy at discharge. As outcome measures we analyzed post-stroke pneumonia and 30-day case-fatality. We used a logistic regression model by each outcome with generalized estimating equations, which accounted for clustering of patients within hospitals and included sex, age (years), clinical status at admission (reduced level of consciousness, speech disturbance, aphasia and hemiplegia), comorbidities, dysphagia screening and neurological evaluation at admission as measures of acute stroke care.ResultsWe reviewed the charts of 677 patients, of which 52.3% were men. The mean age was 69.8 years in women and 66.3 years in men. Diagnosis of stroke was confirmed by a computed tomography scan within 4.5 hours of symptom onset in only 9.6% of the patients. Intravenous thrombolysis was administered in 1.7%. Dysphagia screening was performed in 12.1% (95% CI 9.7-15.0) and antithrombotic therapy was prescribed in 68.9% (95% CI 64.6-72.9). Pneumonia was diagnosed in 23.6% (95% CI 20.4-27.2). Thirty-day fatality was 8.7% (95% CI 6.7-11.3). The variables independently associated with 30-day case fatality were age (OR 1.08, 95% 1.06-1.10), pneumonia (OR 7.7, 95% 95% CI 4.0-14.7), aphasia (OR 2.4, 95% CI 1.1-5.6), reduced level of consciousness (OR 2.4, 95% CI 1.3-4.4), and speech disturbance (OR 1.4, 95% CI 1.0-1.9). No association was found between 30-day case fatality and dysphagia screening or neurological evaluation at admission. The factors associated with post-stroke pneumonia were female sex (OR 1.6, 95% CI 1.0-2.3), age (OR 1.04 95% CI 1.03-1.05), diagnosis of diabetes (OR 1.8, 95% CI 1.4-2.4), aphasia (OR 2.0, 95% CI 1.5-2.7), hemiplegia (OR 1.6, 95% CI 1.1-2.4), and reduced level of consciousness on admission (OR 3.4, 95% CI 2.1-5.5). No association was found between pneumonia and dysphagia screening or neurological evaluation at admission.ConclusionsAdherence to evidence-based performance measures was low. Administration of intravenous thrombolysis was particularly low and diagnostic confirmation of ischemic stroke was delayed. The occurrence of post-stroke pneumonia was frequent and should be reduced. To improve acute stroke care in Chile, organizational change in the health service is urgently needed.

Predicting post-stroke pneumonia: the PANTHERIS score

Stroke-associated pneumonia (SAP) is a common complication with a known negative impact on neurological outcome. We developed a score to identify patients at highest risk of SAP in order to promote prophylactic measures. We conducted a cohort study on a neurological intensive care unit in patients suffering from acute ischemic MCA infarction. Association of predefined demographics, comorbidities, and clinical characteristics with SAP was investigated using logistic regression analysis. Between 2003 and 2010, a total of 335 patients were included in this analysis. Frequency of SAP was 31.3%. A 12-point scoring system was developed based on the following factors: Glasgow Coma Scale (GCS) [GCS < 9 = 5, GCS 9-12 = 2, GCS > 12 = 0], age [<60 = 0, 60-80 = 1, >80 = 2], increase in systolic arterial blood pressure >200 mmHg within the first 24 h after admission [no = 0, yes = 2], and white blood cell count >11.000/μl [no = 0, yes = 3]. The score revealed excellent discrimination (AUC = 0.85) and calibration (Nagelkerke's R² = 0.46) properties. Predictive properties were reproduced in an internal validation group. The PANTHERIS score is a simple scoring system for the prediction of SAP based on easy-to-assess parameters. By identifying patients at high risk, it may guide intense monitoring or prophylactic measures. This score needs to be validated within external datasets.

Superiority of Preventive Antibiotic Treatment Compared with Standard Treatment of Poststroke Pneumonia in Experimental Stroke: A Bed to Bench Approach

Stroke patients are prone to life-threatening bacterial pneumonia. Previous experimental stroke studies have demonstrated that preventive antibiotic treatment (PAT) improves outcome compared with placebo treatment, which however does not model the clinical setting properly. Here we investigate whether PAT is superior to the current clinical 'gold standard' for treating poststroke infections. Therefore, we modeled stroke care according to the current stroke guidelines recommending early antibiotic treatment after diagnosing infections. To reliably diagnose pneumonia in living mice, we established a general health score and a magnetic resonance imaging protocol for radiologic confirmation. Compared with standard treatment after diagnosis by these methods, PAT not only abolished pneumonia successfully but also improved general medical outcome. Both, preventive and standard antibiotic treatment using enrofloxacin improved survival in a similar way compared with placebo treatment. However, in contrast to standard treatment, only PAT improved functional outcome assessed by gait analysis. In conclusion, standard and preventive treatment approach reduced poststroke mortality, however at the cost of a worse neurologic outcome compared with preventive approach. These data support the concept of PAT for treating patients at risk for poststroke infections and warrant phase III trials to prove this concept in clinical setting.

Cough reflex testing in Dysphagia following stroke: a randomized controlled trial.

BackgroundSignificant health issues and service delivery costs are associated with post-stroke pneumonia related to dysphagia. Silent aspiration is known to increase pneumonia and mortality in this population. The utility of cough reflex testing (CRT) for reducing pneumonia in acute stroke patients was the subject of this randomised, controlled trial.MethodsPatients referred for swallowing evaluation (N = 311) were assigned to either 1) a control group receiving standard evaluation or 2) an experimental group receiving standard evaluation with CRT. Participants in the experimental group were administered nebulised citric acid with test results contributing to clinical decisions. Outcomes for both groups were measured by pneumonia rates at 3 months post evaluation and other clinical indices of swallowing management.ResultsAnalysis of the data identified no significant differences between groups in pneumonia rate (P = 0.38) or mortality (P = 0.15). Results of CRT were shown to influence diet recommendations (P < 0.0001) and referrals for instrumental assessment (P < 0.0001).ConclusionsDespite differences in clinical management between groups, the end goal of reducing pneumonia in post stroke dysphagia was not achieved.

Bacterial pneumonia following acute ischemic stroke

BackgroundThe most common serious complication following acute ischemic stroke is pneumonia, which may increase mortality and worsen clinical outcomes. The purpose of this study was to investigate the predictors of 30-day mortality in patients with pneumonia following acute ischemic stroke. MethodsFrom June 2006 to May 2011, we retrospectively included 51 patients with pneumonia following acute ischemic stroke. We analyzed the clinical features, microbiologic data, and outcomes. Predictors of 30-day mortality were investigated by univariate and multivariate analysis. ResultsThe acute ischemic strokes were caused by large-artery atherosclerosis in 37 (72.5%) of the 51 patients. We found that the most common pathogen responsible for poststroke pneumonia was Klebsiella pneumoniae, followed by Pseudomonas aeruginosa and Escherichia coli. Ultimately, 12 patients died of progressive sepsis due to pneumonia after the acute ischemic stroke. The 30-day mortality rate was 23.5%. In the univariate analysis, patients who died within 30 days had higher National Institutes of Health Stroke Scale scores, higher CURB-65 scores, elevated instability of hemodynamic status, and lower Glasgow Coma Scale (GCS) scores. In Cox regression analysis, a GCS score of <9 on the day of pneumonia onset was only significant indicator for 30-day mortality (hazard ratio, 6.72; 95% confidence interval, 2.12–21.30, p = 0.001). ConclusionPneumonia after acute ischemic stroke is a severe complication. Once stroke-related pneumonia develops, neurologic assessment, CURB-65 score, and shock can be used to predict the ultimate prognosis.

Infection in Patients with Acute Stroke

Stroke is a major cause of mortality and morbidity worldwide and efforts to reduce the impact of the disease are strongly needed. Patients with acute stroke have an increased risk of in-hospital complications, in particular pneumonia and urinary tract infections. These infections are associated with an adverse patient outcome and increased health care costs. Here we review the existing knowledge on the risk and consequences of post-stroke pneumonia and UTI in adult patients and discuss the evidence of possible targets for intervention.

Post-Stroke Pneumonia Prevention by Angiotensin-Converting Enzyme Inhibitors: Results of a Meta-analysis of Five Studies in Asians

Angiotensin-converting enzyme inhibitors (ACEIs) are reported to reduce the incidence of aspiration pneumonia in hypertensive patients. In this study, a metaanalysis was conducted to obtain statistically more reliable estimates of outcome. The MEDLINE and JMEDICINE databases were searched and the following study selection criteria were applied: (1) comparative controlled studies identified with the following keywords: drug therapy, ACEI, hypertension, swallowing function, dysphagia, stroke, and pneumonia; (2) a minimum follow-up period of 6 months; and (3) a minimum number of patients of more than 100. Patients with hypertension and a history of stroke or transient ischemic attack (TIA) in five controlled studies that reported the incidence of pneumonia were included in the analysis. A total of 8,693 post-stroke patients were given ACEIs with another antihypertensive agent or placebo as a control. In all studies, ACEIs, particularly imidapril, exhibited preventive effects equating to a relative risk that ranged from 0.32 to 0.81 compared with controls. In the combined studies the overall relative risk of ACEI-treated patients versus controls was 0.61 (95% confidence intervals [CI] 0.51-0.75; P < 0.001). Among Asian patients, the relative risk was 0.42 (95% CI 0.32-0.56; P < 0.001). Among Japanese patients, an even greater preventive effect was found for ACEIs versus other antihypertensives (relative risk: 0.38 [95% CI 0.27-0.54; P < 0.001]). ACEIs appear to be more effective than other antihypertensive agents or placebo in reducing pneumonia risk in post-stroke patients, especially in Asian populations.

Reduced Risk of Poststroke Pneumonia in Thrombolyzed Stroke Patients with Continued Statin Treatment

Pneumonia is a frequent complication after stroke with strong impact on clinical outcome. Statins have pleiotropic immunmodulatory properties and were recently shown to exert beneficial effects on the development and clinical course of pneumonia. We aimed to investigate whether statin use is associated with a reduced risk of poststroke pneumonia in acute ischemic stroke patients treated with tissue plasminogen activator within 4·5hours. Data was extracted from a local register including all consecutive stroke patients who received thrombolysis at our institution. Prior statin use was identified retrospectively from clinical records and had to be continued after hospital admission. Poststroke pneumonia was diagnosed according to standardized criteria of US Centers for Disease Control and Prevention. Mortality and functional outcome at three-months were further assessed. Overall, 481 ischemic stroke patients were analyzed. Continued statin use was documented in 17% of the patients. Frequency of pneumonia was 11%. Patients with statin use were less likely to develop poststroke pneumonia (5% vs. 13%, P = 0·04). After multivariable adjustment for known risk factors for poststroke pneumonia (age, stroke severity, dysphagia, male sex and diabetes), statin treatment was negatively associated with pneumonia (OR 0·31; 95% CI 0·10-0·94). Occurrence of pneumonia independently predicted three-month mortality and functional outcome. Use of statins in acute ischemic stroke patients who receive thrombolysis might reduce the risk of poststroke pneumonia. Further studies are warranted to validate this finding.

Development of a Clinical Score (A 2 DS 2 ) to Predict Pneumonia in Acute Ischemic Stroke

Poststroke pneumonia is a potentially preventable complication after stroke associated with poor outcome. We developed and externally validated a prognostic score for predicting risk of pneumonia after ischemic stroke. The prognostic score was developed based on clinical data routinely collected after admission from the Berlin Stroke Register, Germany. The association of demographics, comorbidities, and clinical characteristics with poststroke pneumonia was investigated using multivariable logistic regression analyses. Independent predictors of poststroke pneumonia were translated into a point scoring system based on the corresponding regression coefficients. The predictive properties of the developed prognostic score were externally validated using an independent data set from the Stroke Register Northwest-Germany. Between 2007 and 2009, 15 335 patients with ischemic stroke were registered within the Berlin Stroke Register. The observed rate of pneumonia in hospital was 7.2%. A 10-point score was derived for prediction of poststroke pneumonia (Age ≥ 75 years=1, Atrial fibrillation=1, Dysphagia=2, male Sex=1, stroke Severity, National Institutes of Health Stroke Scale 0-4=0, 5-15=3, ≥ 16=5; A(2)DS(2)). The proportion of pneumonia varied between 0.3% in patients with a score of 0 point to 39.4% in patients with a score of 10 points. The score demonstrated excellent discrimination (C-statistic 0.84; 95% CI, 0.83-0.85) and calibration (McFadden R(2)=0.21). Prediction, discrimination, and calibration properties were reproduced in the validation cohort consisting of 45 085 patients with ischemic stroke. The A(2)DS(2) score is a valid tool for predicting poststroke pneumonia based on routinely available data. A(2)DS(2) might be useful for guiding monitoring of high-risk patients or prophylactic pneumonia management in clinical routine.

Dynamics of nutritional status in dying patients with acute cerebral infarction in central China: a preliminary study

<title/>Background and aims: Stroke is the number one cause of death in China. Although the effective management has reduced the mortality and lengthened survival, little attention has been paid to nutritional issues in patients with stroke in China. This study aimed to assess the premorbid nutrition status in dying patients with acute cerebral infarction.Methods: In this study, a total of 185 acute ischemic stroke patients dying within 30 days were recruited from medical records. Characteristics of dying patients were assessed on admission, and serum biochemical parameters including serum total protein, serum albumin, and serum prealbumin were measured within 24 hours after stroke onset and every week routinely.Results: Among 185 ischemic stroke patients, 86 dying patients experienced their first-ever acute cerebral infarction, while 99 dying patients were experiencing a recurrent cerebral infarction. The prevalence of dysphagia, post-stroke pneumonia, and gastrointestinal hemorrhage in recurrent stroke groups were higher than those in the first-ever stroke group (P<0·01). There were gradually declines in serum total protein, serum albumin, and serum prealbumin in dying patients from admission to death, especially in the recurrent ischemic stroke group, as compared to their normal range. The sensitive sequence of serum nutritional index for dying patients with ischemic infarction was: serum prealbumin>serum albumin>serum total protein.Conclusions: This study showed that hypoproteinemia and undernutrition were serious in dying patients with acute ischemic stroke, especially in patients with recurrent ischemic stroke. This study also confirmed that serum prealbumin is more sensitive than serum albumin to assess nutritional status. The strategies to improve malnutrition in stroke patients are urgently needed in China.