To report the epidemiology, outcomes and the predictors of survival in patients with out-of-hospital cardiac arrest (OHCA) with pre-hospital shockable cardiac rhythms in Hong Kong. Methods: It was a prospective study based on data from the cardiac arrest registry of emergency departments (ED) in two regional hospitals in Hong Kong from 1st August 2010 to 31st January 2012. All non-traumatic patients aged 18 years or above presented with OHCA with shockable pre-hospital cardiac rhythm and received pre-hospital defibrillation were included. The characteristics of patients, pre-hospital data, management and outcomes were recorded in a standardised form compatible with Utstein template at the time of patient consultation. Binominal logistic regression was applied to evaluate the relationship between survival to admission (STA) and patients' variables. Results: A total of 135 patients fulfilled the inclusion criteria. The mean age was 67.0 years old. The STA rate was 34.8% and the survival to discharge (STD) rate was 6.7%. Factors independently associated with better prognosis in terms of STA were presence of bystander cardiopulmonary resuscitation (CPR) (OR 5.76, 95% CI=1.08-30.5), restoration of spontaneous circulation (ROSC) before arrival to ED (OR 43.94, 95% CI= 4.19-460.43) and short time from calling emergency medical services (EMS) to first defibrillation (OR 0.82, 95% CI=0.70-0.96). Conclusion: STA rate for adults presenting with shockable OHCA in our study was 34.8%. Patients with shockable OHCA with bystander CPR, short call-to-shock time and achieved ROSC before arrival to ED are significantly associated with higher STA rate. (Hong Kong j.emerg.med. 2013;22:131-137) 目的:報告香港院前有可電擊除顫心律的心跳驟停(OHCA)患者的流行病學,結果和患者生存的預測 因子。方法:這是一項前瞻性研究,時間從 2010 年 8 月 1 日至 2012 年 1 月 31 日,數據的基礎來自香港兩 個區域醫院急診室(ED)的心臟驟停登記冊。所有年滿 18 歲或以上的非外傷 OHCA 患者,有可電擊心 律並獲院前除顫者都包括。患者的特性,院前的數據,治療和結果,以一個符合烏特斯坦模板的標準化形 式記錄。應用二項式 logistic 回歸,評估活著入院(STA)和病人的變量之間的關係。結果:共有 135 例 符合納入標準。平均年齡為 67.0 歲。 STA 率為 34.8% ,活著出院率(STD)為 6.7% 。與 STA 相關預後 較好的獨立因素,包括有旁觀者心肺復甦(CPR) (OR5.76 , 95 % CI=1.08-30.5),抵達 ED 前恢復自 主循環(ROSC) (OR43.94 , 95%CI=4.19-460.43)和從呼叫緊急醫療服務(EMS)到首次除顫的 時間短(OR0.82 , 95%CI=0.70-0.96)。結論:在我們的研究中,可電擊 OHCA 成年人的 STA 率為 34.8% 。 STA 率較高的顯著相關因素有:旁觀者 CPR ,呼叫到除顫的時間短,抵達 ED 前達到 ROSC 。
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