近年來，路跑運動的盛行，2019年有超過五百場的馬拉松，但每年都有跑者在路跑中發生猝死，而當發生猝死，四至六分鐘，腦細胞開始受損，超過十分鐘，會造成腦部無法復原的損傷及死亡。
   在本研究中，我們利用穿戴式裝置監測跑者的心率變異度及定位，並由穿戴式裝置計算跑者風險，將風險值與定位回傳至雲端，當跑者為中風險，縮短回傳間隔時間，當跑者為高風險，通知附近救護人員注意該跑者狀況，當跑者發生心肺功能停止，立即派遣救護人員及救護車前往。

Marathon has become very popular in recent years ,there are more than 500 marathons in 2019. However Sudden Cardiac Death(SCD) was happened in marathons every years. The brain may sustain damage after blood flow has been stopped for about 4~6 minutes. There is irreversible damage to the brain after blood flow has stopped for 10 minutes. To be successful, CPR should be started as soon as possible.
In this paper, we designed and implemented an Emergency Medical Dispatch System (EMDS)for marathons .This system will monitor the runner's Heart rate variability (HRV) and location in real time with wearable devices, determining risk level by wearable devices. Moderate risk: keep monitoring and send a reminder to the dispatcher . High risk: EMDS will send a reminder to the nearest Emergency Medical Technician(EMT).When sudden cardiac death occurs, EMDS will dispatch the nearest EMT and ambulance.

目錄
目錄	IV
圖目錄	VI
表目錄	VII
第一章 簡介	1
第二章 相關知識	4
2.1 ECG 心電圖	4
2.2 SCD 猝死	10
2.3 SCDI Sudden Cardiac Death Index	13
第三章 系統架構	15
3.1 感測資料處理	16
3.2 雲端資料串接	17
3.3 後台系統	18
第四章 系統實作	20
4.1 感測資料處理	20
4.2 資料傳輸串接	24
4.3 後台系統	25
第五章 模擬與實驗結果	27
5.1 實驗1	27
5.2 實驗2	28
第六章 結論與未來展望	29
參考文獻	32
附錄-英文論文	35

圖目錄
圖1: 心臟傳導圖	6
圖2: 心電圖電極位置	10
圖3: 系統架構圖	15
圖4: 離散小波轉換	23
圖5: AD8232，Pycom Pytrack，Pycom Sipy，Raspberry Pi Zero W/H	24
圖6: 感測裝置	24
圖7: 從訊息發送到後台資料庫更新時間分佈圖	28
圖8: SCDIndex 模擬結果圖	29

表目錄
表1: 近年來因跑步猝死案件	1
表2: 從訊息發送到後台資料庫更新時間統計表	28
表3:SCDI統計表	29

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