Journal of Yeungnam Medical Science

Original articles

Emergency and Critical Care Medicine
Shockable rhythm as an independent prognostic factor in patients with non-ST elevation undergoing percutaneous coronary intervention after out-of-hospital cardiac arrest: a registry-based cohort study: Su Jeong Shin, Jae Yun Ahn, Sung Bae Moon, Do Won Lee, Yun Jeong Kim, Dong Eun Lee, Jung Ho Kim, Sang Hun Lee, Hyung Jun Hoh, Hyun Wook Ryoo; J Yeungnam Med Sci. 2026;43:62. Published online September 4, 2026; DOI: https://doi.org/10.12701/jyms.2026.43.62 [Epub ahead of print]

49 View
5 Download

Abstract PDF: Background
Although the timing and indications for coronary angiography (CAG) after out-of-hospital cardiac arrest (OHCA) have been widely studied, the characteristics associated with favorable outcomes in patients with non-ST-elevation (non-STE) undergoing percutaneous coronary intervention (PCI) remain unclear.
Methods
This retrospective cohort study used a citywide, prospectively collected OHCA registry in Daegu, Korea (2018–2022), which included adult patients with non-STE after OHCA who underwent both CAG and PCI. Given the limited number of outcome events relative to the covariates, Firth’s penalized logistic regression identified factors independently associated with survival to hospital discharge and favorable neurological outcomes (cerebral performance category 1–2).
Results
Of the 5,026 patients treated by Emergency Medical Services for OHCA, 371 underwent CAG; 258 (69.5%) had no ST elevation on the initial electrocardiogram, and 105 (40.7%) underwent PCI and formed the study cohort. Sixty-nine patients (65.7%) survived to discharge, and 55 (52.4%) had favorable neurological outcomes. Initial shockable rhythm (adjusted odds ratio [aOR], 5.38; 95% confidence interval [CI], 1.77–18.02), prehospital return of spontaneous circulation (ROSC) (aOR, 10.30; 95% CI, 3.62–33.06), and shorter scene time interval (aOR, 0.88 per minute; 95% CI, 0.79–0.98) were independently associated with survival. Initial shockable rhythm (aOR, 11.02; 95% CI, 3.39–43.00) and prehospital ROSC (aOR, 11.69; 95% CI, 3.69–45.03) were independently associated with favorable neurological outcomes.
Conclusion
Among patients with non-STE after OHCA who underwent CAG and PCI, initial shockable rhythm and prehospital ROSC were independently associated with survival and neurological outcomes, whereas shorter scene time interval was independently associated with only survival. Because the cohort was restricted to patients who survived to undergo PCI, these findings reflect prognostic stratification within an already treated group and cannot infer the benefits of CAG or PCI. Therefore, prospective confirmation is warranted.

Emergency and Critical Care Medicine
Outcomes in patients with out-of-hospital cardiac arrest according to prehospital advanced airway management timing: a retrospective observational study: Sang-Hun Lee, Hyun Wook Ryoo; J Yeungnam Med Sci. 2024;41(4):288-295. Published online July 18, 2024; DOI: https://doi.org/10.12701/jyms.2024.00332

5,872 View
86 Download
2 Web of Science
2 Crossref

Background
In patients with out-of-hospital cardiac arrest (OHCA), guidelines recommend advanced airway (AA) management at the advanced cardiovascular life support stage; however, the ideal timing remains controversial. Therefore, we evaluated the prognosis according to the timing of AA in patients with OHCA.
Methods
We conducted a retrospective observational study of patients with OHCA at six major hospitals in Daegu Metropolitan City, South Korea, from August 2019 to June 2022. We compared groups with early and late AA and evaluated prognosis, including recovery of spontaneous circulation (ROSC), survival to discharge, and neurological evaluation, according to AA timing.
Results
Of 2,087 patients with OHCA, 945 underwent early AA management and 1,142 underwent late AA management. The timing of AA management did not influence ROSC in the emergency department (5–6 minutes: adjusted odds ratio [aOR], 0.97; p=0.914; 7–9 minutes: aOR, 1.37; p=0.223; ≥10 minutes: aOR, 1.32; p=0.345). The timing of AA management also did not influence survival to discharge (5–6 minutes: aOR, 0.79; p=0.680; 7–9 minutes: aOR, 1.04; p=0.944; ≥10 minutes: aOR, 1.86; p=0.320) or good neurological outcomes (5–6 minutes: aOR, 1.72; p=0.512; 7–9 minutes: aOR, 0.48; p=0.471; ≥10 minutes: aOR, 0.96; p=0.892).
Conclusion
AA timing in patients with OHCA was not associated with ROSC, survival to hospital discharge, or neurological outcomes.

Citations

Citations to this article as recorded by

The association of prehospital advanced airway management time and outcome in out-of hospital cardiac arrest patients
Thongpitak Huabbangyang, Pramote Papukdee, Rossakorn Klaiangthong, Fahsai Jaibergban, Pannika Paharat, Patcharaporn Doungkaew, Fatiha Chanthep, Menatthinee Suntimetaneedol, Sitthichai Chuanart
Scientific Reports.2026;[Epub] CrossRef
Early Advanced Airway Management and Clinical Outcomes in Out-of-Hospital Cardiac Arrest: A Nationwide Observational Study
Jung Ho Lee, Dahae Lee, Eujene Jung, Hyun Ho Ryu, Jeong Ho Park, Young Sun Ro, Kyoung Jun Song
Journal of Clinical Medicine.2025; 14(21): 7652. CrossRef

Emergency and Critical Care Medicine
Impact of an emergency department resident strike during the coronavirus disease 2019 (COVID-19) pandemic in Daegu, South Korea: a retrospective cross-sectional study: Yo Han Cho, Jae Wan Cho, Hyun Wook Ryoo, Sungbae Moon, Jung Ho Kim, Sang-Hun Lee, Tae Chang Jang, Dong Eun Lee; J Yeungnam Med Sci. 2022;39(1):31-38. Published online August 10, 2021; DOI: https://doi.org/10.12701/yujm.2021.01130

10,735 View
137 Download
11 Web of Science
14 Crossref

Abstract PDF

Background
To prepare for future work stoppages in the medical industry, this study aimed to identify the effects of healthcare worker strikes on the mortality rate of patients visiting the emergency department (ED) at six training hospitals in Daegu, Korea.
Methods
We used a retrospective, cross-sectional, multicenter design to analyze the medical records of patients who visited six training hospitals in Daegu (August 21–September 8, 2020). For comparison, control period 1 was set as the same period in the previous year (August 21–September 8, 2019) and control period 2 was set as July 1–19, 2020. Patient characteristics including age, sex, and time of ED visit were investigated along with mode of arrival, length of ED stay, and in-hospital mortality. The experimental and control groups were compared using t-tests, and Mann-Whitney U-test, chi-square test, and Fisher exact tests, as appropriate. Univariate logistic regression was performed to identify significant factors, followed by multivariate logistic regression analysis.
Results
During the study period, 31,357 patients visited the ED, of which 7,749 belonged to the experimental group. Control periods 1 and 2 included 13,100 and 10,243 patients, respectively. No significant in-hospital mortality differences were found between study periods; however, the results showed statistically significant differences in the length of ED stay.
Conclusion
The ED resident strike did not influence the mortality rate of patients who visited the EDs of six training hospitals in Daegu. Furthermore, the number of patients admitted and the length of ED stay decreased during the strike period.

Citations

Citations to this article as recorded by

Impact of the 2024 Korean medical workforce crisis on transfers in a pediatric emergency center: including comparative analyses with adults
Sung-Ha Kim, Jin Hee Kim, Jae-Hyun Kwon, Soo Hyun Park, Min-Jung Kim, Young-Hoon Byun, Ho-Young Song, So-Hyun Paek, Inge Roggen
PLOS One.2026; 21(5): e0348189. CrossRef
Impact of Mass Resignation of Junior Doctors in Korea on Major Interventions: Interrupted Time Series Analysis
Youngjin Kim, Sung Ju Kim, Tae Hyun Ban, Sukil Kim
Journal of Korean Medical Science.2026;[Epub] CrossRef
Otolaryngology Involvement in Emergency Care for Dizziness During the 2024 Korean Resident Physician Workforce Disruption and Subsequent Return: A Single-Center Retrospective Study
Jung Min Kim, Hye Ok Kim, Jae Min Lee, Dong Gu Hur, Seung Geun Yeo
Healthcare.2026; 14(16): 2618. CrossRef
Impact of the South Korean government’s medical school expansion announcement on pediatric emergency department visits
Arum Choi, Beom Joon Kim, Jooyoung Lee, Sukil Kim, Woori Bae
BMC Emergency Medicine.2025;[Epub] CrossRef
Impact of Medical Residency Programs on Emergency Department Efficiency
Myeong Namgung, Sung Jin Bae, Ho Sub Chung, Kwang Yul Jung, Yun Hyung Choi, Chan Woong Kim, Ye Lim Gong, Ji Yun Lee, Dong-Hoon Lee
Medicina.2025; 61(6): 999. CrossRef
A deliberative framework to assess the justifiability of strike action in healthcare
Ryan Essex
Nursing Ethics.2024; 31(2-3): 148. CrossRef
Impact of junior doctor strikes on patient flow in the emergency department: a cross-sectional analysis
Svenja Ravioli, Raeesa Jina, Omar Risk, Fleur Cantle
European Journal of Emergency Medicine.2024; 31(1): 53. CrossRef
What Do Trainees Want? The Rise of House Staff Unions
Debra Malina, Lisa Rosenbaum
New England Journal of Medicine.2024; 390(3): 279. CrossRef
Medical students’ professionalism attributes, knowledge, practices, and attitudes toward COVID-19 and attitudes toward care provision during pandemic amidst the COVID-19 outbreak according to their demographics and mental health
Eun Kyung Choi, Sanghee Yeo
Korean Journal of Medical Education.2024; 36(2): 157. CrossRef
Impacts of industrial actions, protests, strikes and lockouts by health and care workers during COVID-19 and other pandemic contexts: a systematic review
Isabel Craveiro, Pradeep Kumar Choudhury, Ana Paula Cavalcante de OLiveira, Alessandra Pereira, Inês Fronteira, Raphael Chança, Giorgio Cometto, Mario Roberto Dal Poz, Paulo Ferrinho
Human Resources for Health.2024;[Epub] CrossRef
Why Did All the Residents Resign? Key Takeaways From the Junior Physicians’ Mass Walkout in South Korea
Jinwook Park, Chang Ho Shin, Joo-Young Lee
Journal of Graduate Medical Education.2024; 16(4): 402. CrossRef
Comparison of the postoperative complications for gastric cancer surgery before and during the medical crisis in South Korea: a retrospective observational study
Kyoungdong Lee, Ba Ool Seong, Moon-Won Yoo
Annals of Surgical Treatment and Research.2024; 107(6): 354. CrossRef
Experience of operating a medical humanities course at one medical school during the COVID-19: a retrospective study
Yu Ra Kim, Hye-won Shin, Young Hwan Lee, Seong-Yong Kim
Journal of Yeungnam Medical Science.2023; 40(2): 179. CrossRef
Study on the Learning Environment of Medical Students in the COVID-19
Yu Ra Kim, Hye Jin Park, Saeyoon Kim
Keimyung Medical Journal.2023; 42(2): 80. CrossRef

Emergency and Critical Care Medicine
Determining the correlation between outdoor heatstroke incidence and climate elements in Daegu metropolitan city: Jung Ho Kim, Hyun Wook Ryoo, Sungbae Moon, Tae Chang Jang, Sang Chan Jin, You Ho Mun, Byung Soo Do, Sam Beom Lee, Jong-yeon Kim; Yeungnam Univ J Med. 2019;36(3):241-248. Published online July 2, 2019; DOI: https://doi.org/10.12701/yujm.2019.00248

10,217 View
84 Download
1 Crossref

Abstract PDF

Background
Heatstroke is one of the most serious heat-related illnesses. However, establishing public policies to prevent heatstroke remains a challenge. This study aimed to investigate the most relevant climate elements and their warning criteria to prevent outdoor heatstroke (OHS).
Methods
We investigated heatstroke patients from five major hospitals in Daegu metropolitan city, Korea, from June 1 to August 31, 2011 to 2016. We also collected the corresponding regional climate data from Korea Meteorological Administration. We analyzed the relationship between the climate elements and OHS occurrence by logistic regression.
Results
Of 70 patients who had heatstroke, 45 (64.3%) experienced it while outdoors. Considering all climate elements, only mean heat index (MHI) was related with OHS occurrence (p=0.019). Therefore, the higher the MHI, the higher the risk for OHS (adjusted odds ratio, 1.824; 95% confidence interval, 1.102–3.017). The most suitable cutoff point for MHI by Youden’s index was 30.0°C (sensitivity, 77.4%; specificity, 73.7%).
Conclusion
Among the climate elements, MHI was significantly associated with OHS occurrence. The optimal MHI cutoff point for OHS prevention was 30.0°C.

Citations

Citations to this article as recorded by

Ambient heat exposure and kidney function in patients with chronic kidney disease: a post-hoc analysis of the DAPA-CKD trial
Zhiyan Zhang, Hiddo J L Heerspink, Glenn M Chertow, Ricardo Correa-Rotter, Antonio Gasparrini, Niels Jongs, Anna Maria Langkilde, John J V McMurray, Malcolm N Mistry, Peter Rossing, Robert D Toto, Priya Vart, Dorothea Nitsch, David C Wheeler, Ben Caplin
The Lancet Planetary Health.2024; 8(4): e225. CrossRef

First
Prev
Page of 1
Next
Last

Search