110 South Paca Street 6th Floor, Suite 200
Education and Training
1997-2000 B.S., Biology, American University of Beirut
2000-2004 M.D., American University of Beirut
2009-2011 M.P.H, Boston University School of Public Health, Health Policy &
2015-2017 M.H.C.M., Harvard T.H. Chan School of Public Health, Health Care
Post Graduate Education and Training
2004-2005 Internship, General Surgery, American University of Beirut Medical
2005-2006 Internship, General Surgery, MedStar Washington Hospital Center
2006-2009 Residency, Emergency Medicine, University of Maryland
2009-2011 Fellowship, Emergency Medical Services, Boston University & Boston
Physician executive with American board certification in Emergency Medicine, Emergency Medical Services, and in Clinical Informatics
Emergency medicine, Emergency Medical Services, EMS priority conditions, Trauma systems, Out of hospital cardiac arrest, Disaster preparedness and response.
Bou Saba G, Bachir R, El Sayed M. Impact of Trauma Center Designation Level on the Survival of Trauma Patients Transported by Police in the United States. Prehosp Emerg Care. 2021 Sep 22:1-12. doi: 10.1080/10903127.2021.1983092. Epub ahead of print. PMID: 34550042.
Ariss AB, Bachir R, El Sayed M. Factors associated with survival in adult patients with traumatic arrest: a retrospective cohort study from US trauma centers. BMC Emerg Med. 2021 Jul 5;21(1):77. doi: 10.1186/s12873-021-00473-9. PMID: 34225649; PMCID: PMC8256602.
El Sibai RH, Bachir RH, El Sayed MJ. Seasonal variation in incidence and outcomes of out of hospital cardiac arrest: A retrospective national observational study in the United States. Medicine (Baltimore). 2021 May 7;100(18):e25643. doi: 10.1097/MD.0000000000025643. PMID: 33950942; PMCID: PMC8104224.
Sakr F, Bachir R, El Sayed M. Association Between Mode of Transportation and Survival in Adult Trauma Patients with Blunt Injuries: Matched Cohort Study between Police and Ground Ambulance Transport. Prehosp Disaster Med. Accepted Mar 7, 2021.
Bou Chebl R, Kattouf N, Assaf M, Abou Dagher G, Kassir A, Mahmassani D, Bachir R, El Sayed M. The Weekend Effect in Septic Shock Patients Using the Nationwide Emergency Department Sample Database. Shock. 2021 Feb 25. doi: 10.1097/SHK.0000000000001766. Epub ahead of print. PMID: 33651724
El Sayed MJ. Beirut Ammonium Nitrate Explosion: A Man-Made Disaster in Times of COVID19 Pandemic. Disaster Med Public Health Prep. 2020 Nov 18:1-18. doi: 10.1017/dmp.2020.451. Epub ahead of print. PMID: 33203497.
Colnaric J, Bachir R, El Sayed M. Association Between Mode of Transportation and Outcomes in Penetrating Trauma Across Different Prehospital Time Intervals: A Matched Cohort Study. J Emerg Med. 2021 Jan 26:S0736- 4679(20)31345-7
Mahmassani D, Bachir R, El Sayed M. Patterns and Predictors of Firearm related Spinal Cord Injuries in Adult Trauma Patients. West J Emer Med. 2021 Feb 15;22(2):270-277
Colnaric J, Bachir R, El Sayed M. Association Between Mode of Transportation and Outcomes of Adult Trauma Patients With Blunt Injury Across Different Prehospital Time Intervals in The United States: A Matched Cohort Study. J Emerg Med. 2020 Sep 29:S0736-4679(20)30846-5. doi: 10.1016/j.jemermed.2020.08.004.
Colnaric JM, Bachir RH, El Sayed MJ. Factors Associated with Survival in Adult Trauma Patients Transported to US Trauma Centers by Police. Prehosp Disaster Med. 2021 Feb;36(1):58-66. doi: 10.1017/S1049023X20001314. Epub 2020 Nov 3. PMID: 33138881.
Elsemesmani H, Bachir R, El Sayed MJ. Association Between Trauma Center Level and Outcomes of Adult Patients with Motorcycle Crash-Related Injuries in the United States. J Emerg Med. 2020 Oct;59(4):499-507. doi: 10.1016/j.jemermed.2020.06.018. Epub 2020 Jul 22. PMID: 32709374.
Zgheib H, Wakil C, Shayya S, Bachir R, El Sayed M. Effectiveness and outcomes of 2 therapeutic interventions for cardiac tamponade: A retrospective observational study. Medicine (Baltimore). 2020 Jul 17;99(29):e21290. doi: 10.1097/MD.0000000000021290. PMID: 32702923; PMCID: PMC7373604.
Elhajj A, Dakessian A, Bachir R, El Sayed M. Factors Associated with Survival After Emergency Department Thoracotomy for Adult Trauma Patients in the United States. J Emerg Med. 2020 Aug;59(2):169-177. doi: 10.1016/j.jemermed.2020.05.005. Epub 2020 Jun 24. PMID: 32591301.
Dakessian A, Bachir R, El Sayed MJ. Association Between Trauma Center Designation Levels and Survival of Patients With Motor Vehicular Transport Injuries in the United States. J Emerg Med. 2020 Mar;58(3):398-406. doi: 10.1016/j.jemermed.2019.12.029. Epub 2020 Feb 15. PMID: 32070648.
Dakessian A, Bachir R, El Sayed M. Impact of trauma designation levels on survival of drowning victims: An observational study from trauma centers in the United States. Medicine (Baltimore). 2019 Oct;98(43):e17721. doi: 10.1097/MD.0000000000017721. PMID: 31651907; PMCID: PMC6824668.
Dakessian A, Bachir R, El Sayed M. Impact of trauma level designation on survival of patients arriving with no signs of life to US trauma centers. Am J Emerg Med. 2020 Jun;38(6):1129-1133. doi: 10.1016/j.ajem.2019.158390. Epub 2019 Aug 6. PMID: 31405725.
El Asmar A, Dakessian A, Bachir R, El Sayed M. Out of hospital cardiac arrest outcomes: Impact of weekdays vs weekends admission on survival to hospital discharge. Resuscitation. 2019 Oct;143:29-34. doi: 10.1016/j.resuscitation.2019.08.004. Epub 2019 Aug 8. PMID: 31401136.