Won Hah Park

Sungkyunkwan University, Sŏul, Seoul, South Korea

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Publications (40)97.12 Total impact

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    Asian spine journal 10/2014; 8(5):659-66. DOI:10.4184/asj.2014.8.5.659
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    ABSTRACT: The aim of this study was to test the hypothesis that blood pressure (BP) increase before exercise stress testing is associated with the incidence of hypertension in a prospective study of 3,805 normotensive men without hypertension at baseline. Changes in BP were defined as the difference between seated BP at rest and BP measured immediately before exercise stress testing. Hypertension was defined as systolic and diastolic BP ≥140/90 mm Hg or hypertension diagnosed by a physician at the second examination. During 18,923 patient-years of follow-up, 371 new cases of hypertension developed (incidence rate 19.6 per 1,000 patient-years). Men with systolic BP changes >0 mm Hg and diastolic BP changes >7 mm Hg had 1.70 times (95% confidence interval [CI] 1.37 to 2.12) and 2.23 times (95% CI 1.76 to 2.82) increased relative risk for incident hypertension compared with men whose systolic BP changes were <0 mm Hg and diastolic BP changes were <7 mm Hg after adjustment for confounders. Men in the highest quartile of mean BP change (>10 mm Hg) had a higher incidence of hypertension (relative risk 2.98, 95% CI 2.19 to 4.06) compared with those in the lowest quartile (<0 mm Hg), and each 1 mm Hg increment in mean BP was associated with a 6% (95% CI 1.05 to 1.09) higher incidence of hypertension after adjustment for risk factors. In conclusion, BP increase before exercise stress testing is associated with incident hypertension, independent of risk factors in normotensive men. The assessment of BP immediately before exercise testing may be a useful addition to the standard exercise stress testing procedures.
    The American Journal of Cardiology 07/2014; 114(8). DOI:10.1016/j.amjcard.2014.07.050 · 3.43 Impact Factor
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    Won Hah Park, Yong Gon Seo, Ji Dong Sung
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    ABSTRACT: A left ventricular assist device (LVAD) is a mechanical circulation support implanted for patients with end-stage heart failure. It may be used either as a bridge to cardiac transplantation or as a destination therapy. The health of a 75-year-old man with a medical history of systolic heart failure worsened. Therefore, he was recommended to have implanted a LVAD (Thoratec Corp.) as a destination therapy. After the surgery, he was enrolled in patient cardiac rehabilitation for the improvement of dyspnea and exercise capacity. In results, there is an improvement on his exercise capacity and quality of life. For the first time in Korea, we reported a benefit of exercise therapy after being implanted with a LVAD.
    06/2014; 38(3):396-400. DOI:10.5535/arm.2014.38.3.396
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    ABSTRACT: BACKGROUND:One of the goals of rotator cuff repair is to restore the torn tendon to its original insertion anatomically. However, it is sometimes difficult to restore the entire footprint. PURPOSE:This study was undertaken to evaluate the variables affecting this repair coverage and to discern the differences in retear rate and clinical results between complete and incomplete footprint coverage in rotator cuff surgery. STUDY DESIGN:Case series; Level of evidence, 4. METHODS:From 2007 to 2009, a total of 85 consecutive repairs for medium-to-large rotator cuff tears were identified as having complete or incomplete coverage of their original footprints. We defined the complete footprint coverage (CC) group as patients who had >50% of their footprint covered during repair and the incomplete (IC) group as <50% of their footprint. Factors affecting the amount of footprint coverage were evaluated, and multivariable analysis was conducted to identify independent factors. To assess the final outcome according to the amount of footprint coverage, retear and clinical outcomes were compared between the CC and IC groups. RESULTS:Fifty-seven repairs were defined in the CC group and 28 repairs in the IC group. Preoperatively, age, tear size in coronal oblique and sagittal oblique planes, Goutallier fatty infiltration, and atrophy of the supraspinatus affected the amount of footprint coverage in univariate analysis. In multivariable analysis, however, tear size in the coronal plane was the only independent factor affecting footprint coverage in rotator cuff repair. On postoperative MRI, 45.6% of the CC group had an intact tendon, 45.6% had a delaminated partial retear, and 8.8% had a full-thickness retear; in the IC group, 17.9% had an intact tendon, 60.7% had a delaminated partial retear, and 21.4% had a full-thickness retear. There was a statistically significant difference in the proportion of tendon integrity between groups (P = .028). Clinical scores and range of motion at final follow-up showed no difference between the 2 groups. CONCLUSION:Tear size in the coronal plane was the only independent factor affecting the amount of footprint coverage. Repair quality based on retear classification was different between the 2 groups. However, both complete and incomplete footprint coverage in rotator cuff repair showed no differences in clinical scores and range of motion at short-term follow-up.
    The American Journal of Sports Medicine 02/2014; 42(4). DOI:10.1177/0363546513518581 · 4.70 Impact Factor
  • 01/2014; 21(4):160. DOI:10.4184/jkss.2014.21.4.160
  • Do Kyung Kim, Won Hah Park
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    ABSTRACT: The life situation has been changed in patients who underwent anterior cruciate ligament (ACL) rupture and subsequent reconstruction. The main purpose of this study was to assess the quality of life (QOL) of patients with ACL reconstruction through Short-Form 36 (SF-36) survey. And secondary aim was to investigate a relationship between health-related QOL survey and the correlation of results with other clinical test. 70 patients (age, 32.0±11.7 years) with an after 1 year ACL reconstruction participated in this study. As clinical evaluations, the SF-36 Questionnaire was used for the QOL and isokinetic strength test was performed for the knee extensors and flexors. And the anterio tibial translation was measured by KT-2000. Spearman's correlation coefficient showed significant correlations between knee strength (extensor and flexor) deficit and SF-36 score including physical functioning, bodily pain, vitality, social function score (p<0.05). However, there was no correlation between SF-36 scores and mean ratio of anterior tibial translation (p>0.05). In conclusion, the Knee strength is significantly associated with QOL. Therefore after ACL reconstruction, a speedy recovery of muscular strength will help to improve the QOL.
    01/2014; 32(2):139. DOI:10.5763/kjsm.2014.32.2.139
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    ABSTRACT: Abstract This study investigated the relationship of cardiorespiratory fitness (CRF) with incident metabolic syndrome in 810 middle aged Korean men. All subjects were free of metabolic syndrome at baseline examination. The metabolic syndrome was defined by NCEP criteria and CRF was directly measured by peak oxygen uptake during a treadmill test. During an average of 3.3 years of follow-up, 155 (19.1%) men developed the metabolic syndrome. The incidence of metabolic syndrome was inversely associated with CRF quartiles (p < 0.05). The relative risk (RR) of incident metabolic syndrome in the lowest CRF quartile vs the highest CRF quartile was 1.67 (95% CI = 1.07-2.60) after adjustment for covariates. Each metabolic equivalent (MET) increment in peak oxygen consumption was associated with a 17% (RR = 0.83, 95% CI = 0.73-0.94) lower incidence of metabolic syndrome. These results demonstrate that cardiorespiratory fitness was associated with the incidence of metabolic syndrome independent of covariates in middle aged Korean men.
    Annals of Human Biology 11/2013; 41(5). DOI:10.3109/03014460.2013.849756 · 1.15 Impact Factor
  • 01/2013; 31(1):1. DOI:10.5763/kjsm.2013.31.1.1
  • Do Kyung Kim, Won Hah Park
    01/2013; 31(1):7. DOI:10.5763/kjsm.2013.31.1.7
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    ABSTRACT: The aims of this study were to evaluate the incidence of anchor penetration of the far cortex of the glenoid neck after arthroscopic Bankart repair and to compare the biomechanical properties of anchors in the 4- and 5:30- to 6-o'clock positions on the glenoid. Twelve (6 matched pairs) fresh-frozen human cadaveric shoulders were used to simulate arthroscopic Bankart repair in the lateral decubitus position. The most inferior anchor (5:30 to 6 o'clock) and that above it (4 o'clock) were inserted via the anteroinferior portal on the glenoid using the standard technique. After both anchor insertions, anchor perforation of the glenoid far cortex was identified. Biomechanical properties were measured to determine cyclic displacement of anchors at 100 and 500 cycles, stiffness, yield load, and ultimate failure strength. All 12 suture anchors (100%) at 5:30 to 6 o'clock penetrated throughout the far cortex, whereas only 4 anchors (33%) at 4 o'clock did so (P = .005). The mean distance the anchor tip traveled into far cortex was significantly longer at 5:30 to 6 o'clock than at 4 o'clock (6.8 ± 1.6 mm v 2.0 ± 1.6 mm, P = .001). In terms of mechanical strength, anchors at 5:30 to 6 o'clock had greater 100- and 500-cycle mean displacements than those at 4 o'clock (3.0 ± 0.5 mm v 2.5 ± 0.3 mm, P = .018 for 100 cycles; 3.5 ± 0.7 mm v 2.8 ± 0.3 mm, P = .018 for 500 cycles), although no differences in ultimate failure strength after cyclic loading were found between 2 positions (133.4 ± 40.3 and 133.7 ± 29.2 N, respectively; P = .985). For arthroscopic Bankart repair, insertion of the most inferior anchor via the anteroinferior portal with standard technique, in the lateral decubitus position, carries a high risk of perforating the inferior far cortex of the glenoid (100% in our study). This may result in mechanical weakness of the most inferior repair specifically in the early postoperative period. Perforation of the glenoid far cortex by the most inferior anchor and its mechanical weakness should be taken into consideration. Further study is needed to improve surgical technique to place the most inferior anchor in an optimal position by arthroscopy.
    Arthroscopy The Journal of Arthroscopic and Related Surgery 01/2013; 29(1):31-6. DOI:10.1016/j.arthro.2012.08.013 · 3.10 Impact Factor
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    ABSTRACT: Hypothesis Needle lavage is frequently performed before consideration of surgical removal in shoulders with calcific tendinitis because this may avoid surgery. However, its role in nonoperative treatment has not been fully investigated in terms of clinical and radiographic response. We hypothesized that needle decompression and subacromial steroid injection would show good clinical results in chronic calcific tendinitis patients. Materials and methods Thirty-five shoulders in 30 consecutive patients with painful calcific tendinitis were treated by ultrasound-guided needle decompression and subacromial corticosteroid injection. Patients were prospectively evaluated using American Shoulder and Elbow Surgeons (ASES) and Constant scores at 1, 3, and 6 months after the intervention. Size and morphology of the calcific deposits were compared with those in baseline radiographs at each visit. Results At 6 months after the index procedure, 25 shoulders (71.4%) showed ASES and Constant score improvements from 48.0 and 53.7 to 84.6 and 87.9, respectively (P < .01). Ten shoulders (28.6%) showed no symptom relief at the last follow-up. In shoulders with pain improvement, the mean size of calcific deposits reduced from 13.6 to 5.6 mm (P < .01), and in shoulders with no pain improvement or that underwent operation, mean size was 13.1 mm at initial visits and 12.7 mm at final visits (P = .75). Discussion Shoulders showing little evidence of deposit size reduction at 6 months after needle decompression are less likely to achieve symptomatic improvement and may be considered as candidates for surgical removal. Conclusion Needle decompression with subacromial steroid injection is effective in 71.4% of calcific tendinitis within 6 months. The size of calcific deposits in patients that achieved symptom relief was reduced.
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    ABSTRACT: Low-cardiorespiratory fitness (CRF) has been associated with incident hypertension, but whether temporal changes in CRF are associated with incident hypertension in initially normotensive subjects are not known. We investigated the relationship of baseline CRF and longitudinal changes in CRF with incident hypertension in initially normotensive subjects. Subjects were 3,831 men who participated in two health examinations during 1998-2009. All subjects were free of cardiovascular diseases and hypertension at baseline. CRF was directly measured by peak oxygen uptake using expired gas analysis during a standard treadmill test. During an average of 5 years of follow-up, 373 (9.7%) subjects developed hypertension. The incidence of hypertension was inversely associated with baseline CRF quartiles [Q1 (lowest) 11.8%, Q2 10.4%, Q3 9.1%, and Q4 (highest) 7.5%; P < 0.05 for trend]. The relative risk (RR) of incident hypertension in the lowest CRF quartile versus the highest CRF quartile was 1.69 (95% CI: 1.22-2.34) after adjustment for risk factors. Each metabolic equivalent increment higher peak oxygen uptake at baseline examination was associated with 10% (RR 0.90, 95% CI: 0.83-0.98) lower incidence of hypertension in multivariate adjusted model. Subjects whose CRF decreased (<-1.18 ml/kg/min per year) over time had a 72% increased risk in developing hypertension (RR 1.72, 95% CI: 1.20-2.49) compared to subjects with increased CRF (>0.13 ml/kg/min per year) after adjustment for risk factors. These results demonstrate that both baseline CRF levels and changes in CRF over time were associated with the incidence of hypertension independent of risk factors. Am. J. Hum. Biol. 2012. © 2012 Wiley Periodicals, Inc.
    American Journal of Human Biology 11/2012; 24(6):763-7. DOI:10.1002/ajhb.22313 · 1.93 Impact Factor
  • Journal of Musculoskeletal Pain 05/2012; 20(2). DOI:10.3109/10582452.2012.673547 · 0.32 Impact Factor
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    ABSTRACT: Arterial stiffness is increased in hypertension, even at an earlier stage. The blood pressure (BP) response to exercise reflects the future risk of developing hypertension. We investigated the relationship between the pulse wave velocity (PWV) and the BP response to exercise to evaluate whether arterial stiffness is increased in normotensive persons with higher exercise BPs. The participants of the study were adults with normal BP (SBP < 120 mmHg and DBP < 80 mmHg) without history of clinical cardiovascular diseases, who had undergone health screening. Treadmill exercise tests were done by modified Bruce protocol, and brachial-ankle PWV (baPWV) was measured. The participants were 2156 men and women (69 : 31%) with mean age of 52 ± 5 years. The baPWV correlated significantly to variables such as age, sex, baseline SBP and DBP, pulse pressure, maximal oxygen consumption (VO(2max)), SBP at stage 1, at stage 2 and peak exercise and hemoglobin A1c (HbA1c). In multiple regression model, SBP at stage 1 had a significant association with baPWV after an adjustment with age, sex, VO(2max) and SBP at rest, current smoking and HbA1c. For every 10 mmHg increase in exercise SBP, baPWV increased by 18 ± 0.3 cm/s (P < 0.001). In normotensive individuals, increased arterial stiffness, as reflected by baPWV, is accompanied by higher SBP at the early stage of treadmill exercise test. This finding suggests that arterial stiffening processes are present even in the normotensive setting and are correlated with BP changes during exercise.
    Journal of Hypertension 03/2012; 30(3):587-91. DOI:10.1097/HJH.0b013e32834f41b1 · 4.22 Impact Factor
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    ABSTRACT: The purpose of this study was to do the surveillance study of sports injuries which were suffered to National players of South Korea Team during the summer Asian Games 2010 in Guangzhou. All medical staffs of Korea Delegation were asked to report all sports injuries newly incurred during the Games on injury report form, and the physicians made clinical diagnoses of the injuries. Total 725 injuries (430 athletes) were reported, and 288 injuries (209 athletes) were newly incurred: 68 injuries (58 athletes) were recurrent with previous history, resulting in total incidence rate: 45.5 injuries/1000 athlete exposures (AE) (95% confidence interval [CI]: 40.1-50.6 injuries/1000 AE) and incidence proportion: 26% (95% CI: 23-29). The new injury was highest in athletics (n=37, 12.8%), hockey (n=26, 9.0%), and basketball (n=23, 8.0%). While 162 injuries (56.2%) were incurred during practice, 126 injuries (43.8%) were incurred in competition. The most frequent diagnoses were lateral ankle ligament sprain (n=28, 9.7%, 95% CI: 6.3-13.1), calf muscle cramp (n=23, 95% CI: 4.9-11.1), and hamstring strain (n=22, 95% CI: 4.6-10.7). The relapsed injury was highest in athletics (n=16, 23.5%), basketball (n=6, 8.8%), and wrestling (n=5, 7.4%). While 50 injuries (73.5%) were recurred during practice, 18 injuries (26.5%) were recurred in competition. The most frequent diagnoses of relapsed injury were calf muscle cramp (n=11, 16.2%, 95% CI: 7.4-25.0), low back strain (n=6, 8.8%, 95% CI: 2.1-15.6), and hamstring strain (n=6, 8.8%, 95% CI: 2.1-15.6). Our data indicated incidence rates, incidence proportions, characteristics and frequent diagnoses of acute and recurrent sports injuries during the games, therefore these results could provide relevant information for the sports injury prevention at elite level.
    01/2011; 29(1):49. DOI:10.5763/kjsm.2011.29.1.49
  • Do Kyung Kim, Won Hah Park
    Medicine &amp Science in Sports &amp Exercise 01/2011; 43(Suppl 1):263. DOI:10.1249/01.MSS.0000400722.08410.fa · 4.46 Impact Factor
  • Do Kyung Kim, Won Hah Park
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    ABSTRACT: Reconstruction of the anterior cruciate ligament (ACL) restores knee stability. The remnant preserving technique was developed to preserve mechanoreceptor function, promote revasularzation and facilitate ligamentation. The purpose of this study was to analyze the clinical results of ACL reconstruction with remnant preserving. Between October in 2008 and September in 2009, 40 patients underwent ACL reconstruction using auto graft-hamstring tendon. On the basis of the ACL's condition patients were divided into 2 groups. In the trial group (preserved remnant group, PRG; n=20), there were 20 males with an average age of 26.2 years. In the control group (no remnant group, NRG; n=20) were 20 males with an average of age 27.1 years. We measured concentric peak torque of the knee extensors and flexors at 60°/s and 180°/s on an Isokinetic dynamometry. Proprioceptive functions have been assessed using Joint position sense and threshold to detection of passive motion. Dynamic postural stability was measured as a stability index in the anterior-posterior and medial-lateral planes with the Biodex Stability System. All tests were measured post-operative 1year. We found significant difference between the PRG and NRG for Joint position sense at 15° (2.40°±1.00° vs. 3.36°±0.95°; p=0.0145) and threshold to detect passive motion at 45° (2.02°±0.59° vs. 3.12°±0.94°; p=0.0213). But, we found no significant difference between the groups for the test results of the dynamic postural stability and knee strength. Therefore, preservation of the remnant ACL reconstruction is helpful in preserving the proprioception and function to stabilize the knee.
    01/2011; 29(2):99. DOI:10.5763/kjsm.2011.29.2.99
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    ABSTRACT: Although suprascapular nerve injury after SLAP (superior labrum anterior to posterior) repair has rarely been reported, the direction of anchor insertion is toward the suprascapular nerve. The purpose of this study was to evaluate the risk of suprascapular nerve injury during the drilling and anchor insertion for anterior SLAP repair. Twelve cadaveric shoulders were mounted in a lateral decubitus position (to mimic actual surgery) and 1 suture anchor for anterior SLAP repair was inserted arthroscopically from the anterior portal at 00:30-1:00 o'clock in right shoulders (11-11:30 in left). Then, cadaveric shoulders were dissected to determine the pathway of suprascapular nerve, the location of suture anchor, and anchor perforation of the glenoid wall. Distances from suprascapular nerve to suture anchor tips (which perforated medial cortex of glenoid)-that is, nerve-anchor interval (NAI)--were measured. Glenoid widths and heights were also measured to evaluate the correlation between glenoid areas and NAI. Depth of drilling was also determined. All suture anchors perforated the glenoid wall. Mean drill depth was 14.2 (±2.8) mm and mean NAI was 3.1 (±2.7) mm. In 4 shoulders, suture anchor tips contacted the suprascapular nerve. The mean height of the glenoid surface was 30.0 mm (±2.5), its mean width was 22.9 mm (±1.9), and its mean area was 2164.3 mm(2) (±334.1). No correlation was found between glenoid areas and NAI (P = .277). Suprascapular nerve lies very close to drilling sites and suture anchors during arthroscopic anterior SLAP repair. The present study cautions that care should be taken when anterior anchors are being inserted.
    Journal of shoulder and elbow surgery / American Shoulder and Elbow Surgeons ... [et al.] 10/2010; 20(2):245-50. DOI:10.1016/j.jse.2010.06.004 · 1.93 Impact Factor
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    ABSTRACT: We tested the hypothesis that high cardiorespiratory fitness (fitness) is associated with lower levels of arterial stiffness in 1035 (age 52 ± 6 years) men with and without the metabolic syndrome. Arterial stiffness was derived from brachial-ankle pulse wave velocity (baPWV). Fitness was directly measured by peak oxygen uptake during a standard treadmill test. Men with the metabolic syndrome (n = 168) had significantly higher baPWV than men without the metabolic syndrome (1424 ± 175 cm/s vs. 1333 ± 150 cm/s, p < 0.05). When separated according to quartiles of fitness, men with and without the metabolic syndrome in the highest quartile of fitness had significantly lower baPWV compared to men in the lowest quartile of fitness (p < 0.05). Fitness was inversely correlated with baPWV in men with (p = -0.29, p < 0.05) and without the metabolic syndrome (p = -0.22, p < 0.05). There was no differences in baPWV levels between fit men with the metabolic syndrome and unfit men without the metabolic syndrome (fit/MetS; 1366 ± 140 vs. unfit/no MetS; 1401 ± 194 cm/s, p = 0.81). These results demonstrate that high fitness is inversely associated with arterial stiffness in men with and without the metabolic syndrome. Increased arterial stiffness in the metabolic syndrome is attenuated by high fitness.
    Diabetes research and clinical practice 10/2010; 90(3):326-32. DOI:10.1016/j.diabres.2010.08.025 · 2.74 Impact Factor
  • Journal of shoulder and elbow surgery / American Shoulder and Elbow Surgeons ... [et al.] 04/2010; 19(4):e19-23. DOI:10.1016/j.jse.2010.01.009 · 1.93 Impact Factor

Publication Stats

313 Citations
97.12 Total Impact Points

Institutions

  • 2006–2014
    • Sungkyunkwan University
      • • Department of Orthopedic Surgery
      • • Samsung Medical Center
      Sŏul, Seoul, South Korea
    • University of Illinois, Urbana-Champaign
      • Department of Kinesiology and Community Health
      Urbana, IL, United States
  • 2009
    • University of Seoul
      Sŏul, Seoul, South Korea
  • 2008
    • Samsung Medical Center
      Sŏul, Seoul, South Korea