Angiographic and Hemodynamic Features in Asymptomatic Hemispheres of Patients With Moyamoya Disease

Background and Purpose: There is also a risk of stroke in the asymptomatic hemispheres of moyamoya disease (MMD), but it does not draw enough attention. The study investigated the differences between the three types of asymptomatic hemispheres in MMD and their associations with the two types of symptomatic hemispheres, respectively. Methods: Retrospectively reviewed clinical and imaging characteristics of asymptomatic and symptomatic hemispheres in consecutive cases of single-center MMD patients, with an emphasis on imaging characterization regarding vascular morphology and cerebral perfusion. MMD hemispheres were categorized into 5 types: hemorrhagic hemispheres, ischemic hemispheres, asymptomatic hemispheres in unilateral hemorrhagic MMD, asymptomatic hemispheres in unilateral ischemic MMD, and bilateral asymptomatic hemispheres in MMD. Angiographic feature was assessed by Suzuki’s angiographic stage, while hemodynamic feature was assessed by preinfarction period stage. Results: One hundred ninety-four MMD patients with 388 hemispheres were enrolled. Asymptomatic hemispheres in unilateral hemorrhagic MMD were largely similar to hemorrhagic hemispheres, both had more advanced Suzuki’s angiographic stage and lower degree of hemodynamic failure compared with bilateral asymptomatic hemispheres in MMD and asymptomatic hemispheres in unilateral ischemic MMD. Asymptomatic hemispheres in unilateral ischemic MMD were similar to ischemic hemispheres, both had less advanced Suzuki’s angiographic stage and higher degree of hemodynamic failure compared with bilateral asymptomatic hemispheres in MMD and asymptomatic hemispheres in unilateral hemorrhagic MMD. Bilateral asymptomatic hemispheres in MMD were different from the other hemispheres and had less advanced Suzuki’s angiographic stage and lower degree of hemodynamic failure. ConclusionS: The three types of asymptomatic hemispheres in MMD are defined and have unique angiographic and hemodynamic features. Different combinations of the two features can reflect the tendency of pathological evolution in these different asymptomatic hemispheres.

Development of a New Score for Early Mortality Prediction in Trauma ICU patients. RETRASCORE

BackgroundSeverity scores are commonly used for outcome adjustment and benchmarking of trauma care provided. No specific models performed only with critically ill patients are available. Our objective was to develop a new score for early mortality prediction in trauma ICU patients.MethodsRetrospective study using the Spanish Trauma ICU registry (RETRAUCI) 2015-2019. Patients were divided and analysed into the derivation (2015-2017) and validation sets (2018-2019). We used as candidate variables to be associated with mortality those available in RETRAUCI that could be collected in the first 24 hours after ICU admission. Using logistic regression methodology, a simple score (RETRASCORE) was created with points assigned to each selected variable. The performance of the model was carried out according to global measures, discrimination and calibration.ResultsThe analysis included 9465 patients. Derivation set 5976 and validation set 3489. Thirty-day mortality was 12.2%. The predicted probability of 30-day mortality was determined by the following equation: 1 / (1+exp (-y)), where y=0.598 (Age 50–65) + 1.239 (Age 66–75) + 2.198 (Age > 75) + 0.349 (PRECOAG) + 0.336 (Pre-hospital intubation) + 0.662 (High risk mechanism) + 0.950 (unilateral mydriasis) + 3.217 (bilateral mydriasis) + 0.841 (Glasgow ≤ 8) + 0.495 (MAIS-Head) - 0.271 (MAIS-Thorax) + 1.148 (Hemodynamic failure) + 0.708 (Respiratory failure) + 0.567 (Coagulopathy) + 0.580 (Mechanical ventilation) + 0.452 (Massive haemorrhage) - 5.432. The AUROC was 0.913 (0.903-0.923) in the derivation set and 0.929 (0.918-0.940) in the validation set.ConclusionsThe newly developed RETRASCORE is an early, easy-to-calculate and specific score to predict in-hospital mortality in trauma ICU patients. Although it has achieved adequate internal validation, it must be externally validated.

Veno-Arterial Extracorporeal Membrane Oxygenation for Severe Heatstroke with Refractory Hemodynamic Failure

A 68-year-old male was found unconscious in a hot bathtub on a cold winter’s day and was brought to our hospital. On arrival, the patient’s systolic blood pressure was 65 mm hg, heart rate was 134 beats per min, and rectal temperature was 40.5°C. A large volume infusion of acetated Ringer’s solution and vasopressors were administered as an immediate treatment for circulatory failure due to heatstroke. Although the circulatory failure temporarily improved, the blood pressure dropped almost to the point of cardiac arrest. Veno-arterial extracorporeal membrane oxygenation (VA-ECMO) was implemented and the hemodynamics were soon stabilized. Subsequently, VA-ECMO was withdrawn on the third hospital day. The patient recovered enough to feed normally on the 40th hospital day and was transferred to another hospital on the 116th hospital day. Based on this case study, we consider that VA-ECMO implementation before cardiac arrest might be a suitable strategy.

Impact of cortical hemodynamic failure on both subsequent hemorrhagic stroke and effect of bypass surgery in hemorrhagic moyamoya disease: a supplementary analysis of the Japan Adult Moyamoya Trial

OBJECTIVEHere, the authors aimed to determine whether the presence of cerebral hemodynamic failure predicts subsequent bleeding attacks and how it correlates with the effect of direct bypass surgery in hemorrhagic moyamoya disease.METHODSData from the Japanese Adult Moyamoya (JAM) Trial were used in this study: 158 hemispheres in 79 patients. A newly formed expert panel evaluated the SPECT results submitted at trial enrollment and classified the cortical hemodynamic state of the middle cerebral artery territory of each hemisphere into one of the following three groups: SPECT stage (SS) 0 as normal, SS1 as decreased cerebrovascular reserve (CVR), and SS2 as decreased CVR with decreased baseline blood flow. In the nonsurgical cohort of the JAM Trial, the subsequent hemorrhage rate during the 5-year follow-up was compared between the SS0 (hemodynamic failure negative) and SS1+2 (hemodynamic failure positive) groups. The effect of direct or combined direct/indirect bypass surgery on hemorrhage prevention was examined in each subgroup.RESULTSThe hemodynamic grade was SS0 in 59 (37.3%) hemispheres, SS1 in 87 (55.1%), and SS2 in 12 (7.6%). In the nonsurgical cohort, subsequent hemorrhage rates in the SS0 and SS1+2 groups were 12 cases per 1000 person-years and 67 cases per 1000 person-years, respectively. Kaplan-Meier analysis revealed that hemorrhagic events were significantly more common in the SS1+2 group (p = 0.019, log-rank test). Cox regression analysis showed that hemodynamic failure was an independent risk factor for subsequent hemorrhage (HR 5.37, 95% CI 1.07–27.02). In the SS1+2 subgroup, bypass surgery significantly suppressed hemorrhagic events during 5 years (p = 0.001, HR 0.16, 95% CI 0.04–0.57), with no significant effect in the SS0 group (p = 0.655, HR 1.56, 95% CI 0.22–11.10). Examination of effect modification revealed that the effect of surgery tended to differ nonsignificantly between these two subgroups (p = 0.056).CONCLUSIONSHemodynamic failure is an independent risk factor for subsequent hemorrhage in hemorrhagic moyamoya disease. Direct bypass surgery showed a significant preventive effect in the hemodynamically impaired hemispheres. Thus, hemodynamic failure, as well as previously proposed factors such as choroidal anastomosis, should be considered for the surgical indication in hemorrhagic moyamoya disease.Clinical trial registration no.: C000000166 (umin.ac.jp)