Wonchul Cha
Assistant Professor
Samsung Medical Center
Emergency Physician, Associate CMIO, studying about digital health, mobile health, and clinical decision support. Also interested in metadata system and machine learning.
1: Jung KY, Kim T, Hwang SY, Lee TR, Yoon H, Shin TG, Sim MS, Cha WC, Jeon HJ.
Deliberate Self-harm among Young People Begins to Increase at the Very Early Age:
a Nationwide Study. J Korean Med Sci. 2018 May 29;33(30):e191. doi:
10.3346/jkms.2018.33.e191. eCollection 2018 Jul 23. PubMed PMID: 30034304; PubMed
Central PMCID: PMC6052326.
2: Soh JY, Cha WC, Chang DK, Hwang JH, Kim K, Rha M, Kwon H. Development and
Validation of a Multidisciplinary Mobile Care System for Patients With Advanced
Gastrointestinal Cancer: Interventional Observation Study. JMIR Mhealth Uhealth.
2018 May 7;6(5):e115. doi: 10.2196/mhealth.9363. PubMed PMID: 29735478.
3: Cheong IY, An SY, Cha WC, Rha MY, Kim ST, Chang DK, Hwang JH. Efficacy of
Mobile Health Care Application and Wearable Device in Improvement of Physical
Performance in Colorectal Cancer Patients Undergoing Chemotherapy. Clin
Colorectal Cancer. 2018 Jun;17(2):e353-e362. doi: 10.1016/j.clcc.2018.02.002.
Epub 2018 Feb 17. PubMed PMID: 29551558.
4: Ko E, Shin JK, Cha WC, Park JH, Lee TR, Yoon H, Lee G, Hwang SY, Shin TG, Sim
MS, Jo IJ, Rhee JE, Song KJ, Jeong YK, Shin SD, Choi JH; Cardiac Arrest Pursuit
Trial with Unique Registry; Epidemiologic Surveillance investigators. Coronary
angiography is related to improved clinical outcome of out-of-hospital cardiac
arrest with initial non-shockable rhythm. PLoS One. 2017 Dec 29;12(12):e0189442.
doi: 10.1371/journal.pone.0189442. eCollection 2017. PubMed PMID: 29287074;
PubMed Central PMCID: PMC5747431.
5: Kang JS, Jhun BW, Yoon H, Lim SM, Ko E, Park JH, Hwang SY, Lee SU, Lee TR, Cha
WC, Shin TG, Sim MS, Jo IJ. The Utility of Preliminary Patient Evaluation in a
Febrile Respiratory Infectious Disease Unit outside the Emergency Department. J
Korean Med Sci. 2017 Sep;32(9):1534-1541. doi: 10.3346/jkms.2017.32.9.1534.
PubMed PMID: 28776351; PubMed Central PMCID: PMC5546975.
6: Shin J, Ko E, Cha WC, Lee TR, Yoon H, Hwang SY, Shin TG, Sim MS, Jo IJ, Song
KJ, Rhee JE, Jeong YK, Choi JH. Impact of early coronary angiography on the
survival to discharge after out-of-hospital cardiac arrest. Clin Exp Emerg Med.
2017 Jun 30;4(2):65-72. doi: 10.15441/ceem.16.167. eCollection 2017 Jun. PubMed
PMID: 28717775; PubMed Central PMCID: PMC5511956.
7: Hwang SY, Jo IJ, Lee SU, Lee TR, Yoon H, Cha WC, Sim MS, Shin TG. Low Accuracy
of Positive qSOFA Criteria for Predicting 28-Day Mortality in Critically Ill
Septic Patients During the Early Period After Emergency Department Presentation.
Ann Emerg Med. 2018 Jan;71(1):1-9.e2. doi: 10.1016/j.annemergmed.2017.05.022.
Epub 2017 Jun 29. PubMed PMID: 28669551.
8: Park J, Hwang SY, Shin TG, Jo IJ, Yoon H, Lee TR, Cha WC, Sim MS. Emergency
medical service personnel need to improve knowledge and attitude regarding
prehospital sepsis care. Clin Exp Emerg Med. 2017 Mar 30;4(1):48-55. doi:
10.15441/ceem.16.159. eCollection 2017 Mar. PubMed PMID: 28435902; PubMed Central
PMCID: PMC5385514.
9: Lee TR, Hwang SY, Cha WC, Shin TG, Sim MS, Jo IJ, Song KJ, Rhee JE, Jeong YK.
Role of coronary angiography for out-of-hospital cardiac arrest survivors
according to postreturn of spontaneous circulation on an electrocardiogram.
Medicine (Baltimore). 2017 Feb;96(7):e6123. doi: 10.1097/MD.0000000000006123.
PubMed PMID: 28207539; PubMed Central PMCID: PMC5319528.
10: Hwang SY, Shin TG, Jo IJ, Jeon K, Suh GY, Lee TR, Yoon H, Cha WC, Sim MS.
Neutrophil-to-lymphocyte ratio as a prognostic marker in critically-ill septic
patients. Am J Emerg Med. 2017 Feb;35(2):234-239. doi:
10.1016/j.ajem.2016.10.055. Epub 2016 Oct 27. PubMed PMID: 27806894.
11: Park J, Hwang SY, Jo IJ, Jeon K, Suh GY, Lee TR, Yoon H, Cha WC, Sim MS,
Carriere KC, Yeon S, Shin TG. Impact of Metformin Use on Lactate Kinetics in
Patients with Severe Sepsis and Septic Shock. Shock. 2017 May;47(5):582-587. doi:
10.1097/SHK.0000000000000782. PubMed PMID: 27792125.
12: Kim GB, Hwang SY, Shin TG, Lee TR, Cha WC, Sim MS, Jo IJ, Song KJ, Rhee JE,
Jeong YK. Upper airway obstruction resulting from acute mucosal injury induced by
direct ingestion of sodium picosulfate/magnesium citrate powder. Clin Exp Emerg
Med. 2016 Jun 30;3(2):109-111. eCollection 2016 Jun. PubMed PMID: 27752627;
PubMed Central PMCID: PMC5051613.
13: Oh TG, Cha WC, Jo IJ, Kang MJ, Lee DW. A survey-based study on the protocols
for therapeutic hypothermia in cardiac arrest patients in Korea: focusing on the
differences between level 1 and 2 centers. Clin Exp Emerg Med. 2015 Dec
28;2(4):210-216. eCollection 2015 Dec. PubMed PMID: 27752600; PubMed Central
PMCID: PMC5052908.
14: Ko E, Lee JH, Chae MK, Lee TR, Sim MS, Shin TG, Cha WC, Jo IJ, Song KJ, Rhee
JE, Jeong YK. Successful fibrinolytic and therapeutic hypothermic management of
cardiac arrest following massive pulmonary embolism. Clin Exp Emerg Med. 2015 Sep
30;2(3):193-196. eCollection 2015 Sep. PubMed PMID: 27752597; PubMed Central
PMCID: PMC5052846.
15: Lim SM, Cha WC, Chae MK, Jo IJ. Contamination during doffing of personal
protective equipment by healthcare providers. Clin Exp Emerg Med. 2015 Sep
30;2(3):162-167. eCollection 2015 Sep. PubMed PMID: 27752591; PubMed Central
PMCID: PMC5052842.
16: Cha WC, Ahn KO, Shin SD, Park JH, Cho JS. Emergency Department Crowding
Disparity: a Nationwide Cross-Sectional Study. J Korean Med Sci. 2016
Aug;31(8):1331-6. doi: 10.3346/jkms.2016.31.8.1331. Epub 2016 May 18. PubMed
PMID: 27478347; PubMed Central PMCID: PMC4951566.
17: Choe EA, Shin TG, Jo IJ, Hwang SY, Lee TR, Cha WC, Sim MS. The Prevalence and
Clinical Significance of Low Procalcitonin Levels Among Patients With Severe
Sepsis or Septic Shock in the Emergency Department. Shock. 2016 Jul;46(1):37-43.
doi: 10.1097/SHK.0000000000000566. PubMed PMID: 27299586.
18: Chae MK, Ko E, Lee JH, Lee TR, Yoon H, Hwang SY, Cha WC, Shin TG, Sim MS, Jo
IJ, Song KJ, Rhee JE, Jeong YK. Better prognostic value with combined optic nerve
sheath diameter and grey-to-white matter ratio on initial brain computed
tomography in post-cardiac arrest patients. Resuscitation. 2016 Jul;104:40-5.
doi: 10.1016/j.resuscitation.2016.04.001. Epub 2016 Apr 30. PubMed PMID:
27143123.
19: Ahn JY, Ryoo HW, Park J, Kim JK, Lee MJ, Kim JY, Shin SD, Cha WC, Seo JS, Kim
YA. New Intervention Model of Regional Transfer Network System to Alleviate
Crowding of Regional Emergency Medical Center. J Korean Med Sci. 2016
May;31(5):806-13. doi: 10.3346/jkms.2016.31.5.806. Epub 2016 Mar 22. PubMed PMID:
27134506; PubMed Central PMCID: PMC4835610.
20: Park JH, Ahn KO, Shin SD, Cha WC, Ryoo HW, Ro YS, Kim T. The
first-door-to-balloon time delay in STEMI patients undergoing interhospital
transfer. Am J Emerg Med. 2016 May;34(5):767-71. doi: 10.1016/j.ajem.2015.12.058.
Epub 2015 Dec 23. PubMed PMID: 26926589.
21: Chae MK, Lee JH, Lee TR, Yoon H, Hwang SY, Cha WC, Shin TG, Sim MS, Jo IJ,
Song KJ, Rhee JE, Jeong YK. Early central diabetes insipidus: An ominous sign in
post-cardiac arrest patients. J Crit Care. 2016 Apr;32:63-7. doi:
10.1016/j.jcrc.2015.12.002. Epub 2015 Dec 11. PubMed PMID: 26783152.
22: Park HA, Ahn KO, Shin SD, Cha WC, Ro YS. The Effect of Emergency Medical
Service Use and Inter-hospital Transfer on Prehospital Delay among Ischemic
Stroke Patients: A Multicenter Observational Study. J Korean Med Sci. 2016
Jan;31(1):139-46. doi: 10.3346/jkms.2016.31.1.139. Epub 2015 Dec 24. PubMed PMID:
26770050; PubMed Central PMCID: PMC4712573.
23: Shin TG, Jo IJ, Hwang SY, Jeon K, Suh GY, Choe E, Lee YK, Lee TR, Cha WC, Sim
MS. Comprehensive Interpretation of Central Venous Oxygen Saturation and Blood
Lactate Levels During Resuscitation of Patients With Severe Sepsis and Septic
Shock in the Emergency Department. Shock. 2016 Jan;45(1):4-9. doi:
10.1097/SHK.0000000000000466. PubMed PMID: 26674449.
