BACKGROUND:Emergency medical services are an important part of acute stroke management. We devised a prehospital stroke scale, the TOYOTA prehospital stroke scale for tissue plasminogen activator (t-PA) intravenous therapy (TOPSPIN) for triaging patients with ischemic stroke and especial indications for intravenous t-PA therapy in December 2006; this scale comprises 5 items including consciousness, atrial fibrillation, language disorder, disturbance of the upper extremities, and disturbance of the lower extremities. The aim of this study was to analyze the results of 10 years of TOPSPIN implementation and to distinguish ischemic stroke from hemorrhagic stroke in the real world. METHODS:We prospectively enrolled consecutive patients who were transferred to our hospital and evaluated by Toyota city ambulance services using the TOPSPIN from December 2006 to January 2017. We examined definite diagnosis at the time of hospital discharge (ischemic stroke, hemorrhagic stroke, or stroke mimic), positive-predictive value of the stroke, the rate of the recanalization therapy, and clinical differentiation among patients with hemorrhagic stroke, ischemic stroke, and stroke mimics. RESULTS:A total of 1,482 consecutive patients were enrolled; 1,134 (76.5%) were patients with stroke (628 ischemic-type, 34 transient ischemic attack-type, and 472 hemorrhagic-type) and 348 (23.5%) without stroke (80 with seizure, 42 with syncope, 27 with hypoglycemia, and 199 other). Among 628 patients with ischemic stroke, 130 (20.7%) received intravenous recombinant t-PA treatment, endovascular therapy, or both. The presence of atrial fibrillation, older age, lower blood pressure, and lower total TOPSPIN score was more commonly associated with ischemic stroke than with hemorrhagic stroke. In multivariable logistic regression analysis, the presence of atrial fibrillation was independently associated with ischemic stroke (OR 2.33; 95% CI 1.61-3.40). CONCLUSIONS:The TOPSPIN is a simple prehospital stroke scale that includes an assessment of atrial fibrillation. Detection of atrial fibrillation in the prehospital stage may point to a higher probability of ischemic stroke.

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