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Ki Woong Nam

Seoul National University · Medicine

About the Lab

Professor Ki Woong Nam's research lab specializes in cerebrovascular and metabolic medicine, focusing on the pathophysiological links between metabolic markers and cerebrovascular diseases. The lab investigates biomarkers such as the neutrophil-to-lymphocyte ratio (NLR), triglyceride-glucose (TyG) index, and homocysteine in relation to stroke outcomes, including stroke-associated pneumonia, early recurrent lesions, and neurological deterioration. A central theme is identifying accessible, objective, and clinically relevant indicators for predicting stroke complications and progression, particularly in subgroups like patients with cancer or subcortical infarctions. The lab also explores the role of insulin resistance and hypercoagulability in stroke pathogenesis, especially in cryptogenic stroke.

cerebrovascular diseasemetabolic biomarkersstroke prognosisTyG indexneurological deterioration

Research Overview

Papers
136
Total Citations
2,938
Papers (5y)
35
Primary Field
Medicine

Research Output Trend

Figures are computed from collected data and may differ slightly.

Publications per year (5y)
35total
2022
2023
2024
2025
2026
Citations per year (5y)
274total
20222023202420252026

Selected Papers

15
1
Article|239 citations·2018
High Neutrophil-to-Lymphocyte Ratio Predicts Stroke-Associated Pneumonia
Ki‐Woong Nam, Tae Jung Kim, Ji Sung Lee, Hyung‐Min Kwon, Yong-Seok Lee, Sang‐Bae Ko, Byung‐Woo Yoon
SJR Q1StrokeOA

Background and Purpose- Although there are a variety of risk factors and predictive models for stroke-associated pneumonia (SAP), more objective and easily accessible markers are still needed. In this study, we evaluated the relationship between the neutrophil-to-lymphocyte ratio (NLR) and SAP in patients with acute ischemic stroke. Methods- We assessed 1317 consecutive patients with acute ischemic stroke. SAP was defined according to the modified Centers for Disease Control and Prevention crite

EpidemiologyMedicine
2
Article|113 citations·2020
High triglyceride-glucose index is associated with subclinical cerebral small vessel disease in a healthy population: a cross-sectional study
Ki‐Woong Nam, Hyung‐Min Kwon, Han‐Yeong Jeong, Jin‐Ho Park, Hyuktae Kwon, Su‐Min Jeong
SJR Q1Cardiovascular DiabetologyOA

BACKGROUND: The triglyceride-glucose (TyG) index is a marker of insulin resistance (IR) and has been associated with various metabolic syndromes, cardiovascular diseases, and cerebrovascular diseases. However, limited information is available regarding its association with subclinical cerebral small vessel disease (cSVD). In this study, we evaluated the relationship between the TyG index and cSVD, including silent brain infarcts (SBIs) and white matter hyperintensity (WMH). METHODS: We assessed

Endocrinology, Diabetes and MetabolismMedicine
3
Article|84 citations·2021
High triglyceride-glucose index is associated with early recurrent ischemic lesion in acute ischemic stroke
Ki‐Woong Nam, Hyung‐Min Kwon, Yong-Seok Lee
SJR Q1Scientific ReportsOA

The triglyceride-glucose (TyG) index has been associated with various metabolic, cardiovascular, and cerebrovascular diseases. We evaluated the association between the TyG index and early recurrent ischemic lesions (ERILs) in patients with acute ischemic stroke (AIS). We included consecutive patients diagnosed with AIS between 2010 and 2016. ERILs were defined as new diffusion-weighted imaging lesions outside the initial symptomatic lesion area. The TyG index was calculated using the following f

Pulmonary and Respiratory MedicineMedicine
4
Article|84 citations·2019
Serum homocysteine level is related to cerebral small vessel disease in a healthy population
Ki‐Woong Nam, Hyung‐Min Kwon, Han‐Yeong Jeong, Jin‐Ho Park, Hyuktae Kwon, Su‐Min Jeong
SJR Q1Neurology

Serum tHcy level is correlated with cSVD development in a dose-dependent manner. These findings provide us with clues for further studies of the pathophysiology of cSVD.

RheumatologyMedicine
5
Article|78 citations·2016
D‐dimer as a predictor of early neurologic deterioration in cryptogenic stroke with active cancer
Ki‐Woong Nam, C. K. Kim, Tae Jung Kim, S. J. An, Andrew M. Demchuk, Y. Kim, Seunguk Jung, Moon‐Ku Han, Sang‐Bae Ko, Byung‐Woo Yoon
SJR Q1European Journal of Neurology

BACKGROUND AND PURPOSE: The occurrence of stroke in cancer patients is caused by conventional vascular risk factors and cancer-specific mechanisms. However, cryptogenic stroke in patients with cancer was considered to be more related to cancer-specific hypercoagulability. In this study, we investigated the potential of the D-dimer level to serve as a predictor of early neurologic deterioration (END) in cryptogenic stroke patients with active cancer. METHODS: We recruited 109 cryptogenic stroke p

EpidemiologyMedicine
6
Article|68 citations·2017
Cerebral white matter hyperintensity is associated with intracranial atherosclerosis in a healthy population
Ki‐Woong Nam, Hyung‐Min Kwon, Han‐Yeong Jeong, Jin‐Ho Park, Sang Hyuck Kim, Su‐Min Jeong, Tae Gon Yoo, Shinhye Kim
SJR Q1Atherosclerosis
Pulmonary and Respiratory MedicineMedicine
7
Article|64 citations·2017
High neutrophil to lymphocyte ratio is associated with white matter hyperintensity in a healthy population
Ki‐Woong Nam, Hyung‐Min Kwon, Han‐Yeong Jeong, Jin‐Ho Park, Sang Hyuck Kim, Su‐Min Jeong, Tae Gon Yoo, Shinhye Kim
SJR Q1Journal of the Neurological Sciences
OncologyMedicine
8
Article|59 citations·2021
Triglyceride-glucose index is associated with early neurological deterioration in single subcortical infarction: Early prognosis in single subcortical infarctions
Ki‐Woong Nam, Min Kyoung Kang, Han‐Yeong Jeong, Tae Jung Kim, Eung‐Joon Lee, Jeonghoon Bae, Kipyoung Jeon, Keun‐Hwa Jung, Sang‐Bae Ko, Byung‐Woo Yoon
SJR Q1International Journal of Stroke

BACKGROUND: The research about the influence of triglyceride-glucose index on early prognosis in stroke is lacking. AIMS: In this study, we evaluated the association between triglyceride-glucose index and early neurological deterioration in patients with single subcortical infarctions. METHODS: Consecutive patients with single subcortical infarctions within 72 h of symptom onset between 2011 and 2015. Early neurological deterioration was defined as an increase of ≥2 in the total NIHSS score or ≥

EpidemiologyMedicine
9
Article|56 citations·2021
Different Predictive Factors for Early Neurological Deterioration Based on the Location of Single Subcortical Infarction
Ki‐Woong Nam, Hyung‐Min Kwon, Yong-Seok Lee
SJR Q1StrokeOA

Background and Purpose: Patients with single subcortical infarctions (SSIs) have relatively a favorable prognosis, but they often experience early neurological deterioration (END). In this study, we compared the predictors for END in patients with SSI according to the location of the lesion. Methods: We included consecutive patients with SSIs within 72 hours of symptom onset presenting between 2010 and 2016. END was defined as an increase of ≥2 in the total National Institutes of Health Stroke S

EpidemiologyMedicine
10
Article|56 citations·2017
The presence and severity of cerebral small vessel disease increases the frequency of stroke in a cohort of patients with large artery occlusive disease
Ki‐Woong Nam, Hyung‐Min Kwon, Jae‐Sung Lim, Moon‐Ku Han, Hyunwoo Nam, Yong-Seok Lee
SJR Q1PLoS ONEOA

Cerebral SVD is associated with recurrent stroke in patients with LAA. Additionally, it may affect any mechanisms of recurrent stroke and even with a dose response manner.

Pulmonary and Respiratory MedicineMedicine
11
Article|54 citations·2018
High neutrophil to lymphocyte ratios predict intracranial atherosclerosis in a healthy population
Ki‐Woong Nam, Hyung‐Min Kwon, Han‐Yeong Jeong, Jin‐Ho Park, Sang Hyuck Kim, Su‐Min Jeong
SJR Q1Atherosclerosis
OncologyMedicine
12
Article|52 citations·2022
Systemic immune-inflammation index is associated with white matter hyperintensity volume
Ki‐Woong Nam, Hyung‐Min Kwon, Han‐Yeong Jeong, Jin‐Ho Park, Hyuktae Kwon, Hyuktae Kwon, Hyuktae Kwon
SJR Q1Scientific ReportsOA

Systemic immune-inflammation index (SII) is a novel inflammatory marker based on the composition ratio of blood cell counts. In this study, we evaluated the association between the SII and cerebral small vessel disease (cSVD) in health check-up participants. We evaluated participants from our health check-up registry between 2006 and 2013. The SII was calculated using the following formula: SII = (platelet count × neutrophil count)/lymphocyte count. cSVD was assessed by considering white matter

EpidemiologyMedicine
13
Article|48 citations·2017
Treatment of Cryptogenic Stroke with Active Cancer with a New Oral Anticoagulant
Ki‐Woong Nam, Chi Kyung Kim, Tae Jung Kim, Sang Joon An, Kyungmi Oh, Sang‐Bae Ko, Byung‐Woo Yoon
SJR Q1Journal of Stroke and Cerebrovascular Diseases
Internal MedicineMedicine
14
Article|41 citations·2017
Predictors of 30-day mortality and the risk of recurrent systemic thromboembolism in cancer patients suffering acute ischemic stroke
Ki‐Woong Nam, Chi Kyung Kim, Tae Jung Kim, Sang Joon An, Kyungmi Oh, Heejung Mo, Min Kyoung Kang, Moon‐Ku Han, Andrew M. Demchuk, Sang‐Bae Ko, Byung‐Woo Yoon
SJR Q1PLoS ONEOA

D-dimer levels may predict 30-day mortality in acute ischemic stroke patients with active cancer.

EpidemiologyMedicine
15
Article|35 citations·2019
Neutrophil-to-lymphocyte ratio predicts early worsening in stroke due to large vessel disease
Ki‐Woong Nam, Tae Jung Kim, Ji Sung Lee, Soo Hyun Park, Hae-Bong Jeong, Byung Woo Yoon, Sang‐Bae Ko
SJR Q1PLoS ONEOA

Serum NLR levels were associated with END events in patients with ischemic stroke due to LAA. Since NLR was also closely correlated with the underlying vascular lesions, our results indicated clues for mechanisms of END events.

OncologyMedicine

Research Areas

EpidemiologyPulmonary and Respiratory MedicineCardiology and Cardiovascular MedicineOncologyNeurologyMolecular Biology

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