Erratum: Two-year clinical outcomes in stable angina and acute coronary syndrome after percutaneous coronary intervention of left main coronary artery disease

In the article cited above, fourth line of the first paragraph in Methods part, page 1085, has an error. Chonbuk National University Hospital should be corrected as “Chonnam National University Hospital.”

Erratum: Two-year clinical outcomes in stable angina and acute coronary syndrome after percutaneous coronary intervention of left main coronary artery disease

In the article cited above, fourth line of the first paragraph in Methods part, page 1085, has an error. Chonbuk National University Hospital should be corrected as “Chonnam National University Hospital.”

Two-year clinical outcomes in stable angina and acute coronary syndrome after percutaneous coronary intervention of left main coronary artery disease

BACKGROUND/AIMS: This study appraised the long term clinical outcomes of patients treated with percutaneous coronary intervention (PCI) for unprotected left main coronary artery (ULMCA) disease. There are limited data regarding long-term clinical outcomes after PCI for ULMCA disease. METHODS: From 2001 to 2011, a total of 448 patients who underwent PCI for ULMCA disease and had 2-year clinical follow-up, were analyzed. The study patients were divided into two groups: group I (stable angina pectoris [SAP], n = 60, 48 men, 62 ± 10 years) and group II (acute coronary syndrome [ACS], n = 388, 291 men, 64 ± 10 years). We evaluated clinical and angiographic characteristics and major adverse cardiac events (MACE) during 2-year clinical follow-up. RESULTS: Mean age of studied patients was 64 ± 10 years with 339 male patients. Average stent diameter was 3.6 ± 0.4 mm and stent length was 19.7 ± 6.3 mm. Stent implantation techniques and use of intravascular ultrasound guidance were not different between two groups. In-hospital mortality was 0% in group I and 7% in group II (p = 0.035). One-month mortality was 0% in group I and 7.7% in group II (p = 0.968). Two-year survival rate was 93% in the group I and 88.4% in the group II (p = 0.921). Predictive factors for 2-year MACE were hypertension, Killip class ≥ 3, and use of intra-aortic balloon pump by multivariate analysis. CONCLUSIONS: Although in-hospital mortality rate was higher in ACS than in SAP, clinical outcomes during 2-year clinical follow-up were similar between SAP and ACS after PCI of ULMCA.

Unilateral Pedicle Screw Fixation in Degenerative Lumbar Spinal Stenosis / 대한척추외과학회지

STUDY DESIGN: We have studied prospectively the clinical and radiological results after unilateral pedicle screw fixation in degenerative lumbar spinal stenosis. OBJECTIVE: To evaluate the clinical significance of unilateral pedicle screw fixation. SUMMARY OF LITERATURE REVIEW: The use of pedicle screw fixation has significantly increased fusion rate in degenerative lumbar spinal surgery. However, the rigid spinal fixation may result in deterioration of the juxta-fusion segments and lead to the stress-shielding of vertebral bodies within the stabilized segments. MATERIALS AND METHODS: From July 1997 to October 1998, we had performed bilateral posterolateral fusion and unilateral pedicle screw fixation for degenerative spinal stenosis in nign cases. The main indications for unilateral pedicle screw fixation included patients undergoing decompressive laminectomies, which preserved the facet joints. One of the patients was initially scheduled for bilateral pedicle screw fixation. However, during the application of the instrumentation, loosening of a pedicle screw was occurred. Only unilateral pedicle screw fixation on the contralateral side was kept. The clinical results were assessed the back pain, radiating pain and claudicaion. We assessed the radiologic results such as fusion status and maintenance of disc height. RESULTS: The back pains were improved in 6 cases , and the radiating pain and claudication were improved in eight cases after the operation. According to Lenke's grade, fusion status were showed grade A in nign segments and grade B in four segments at the last follow-up radiograph. The loss of disc height averaged 7.8(1-25)% in thirteen segments. CONCLUSION: Unilateral pedicle screw fixation is one of the useful methods for patients undergoing decompressive laminec-tomies, which preserve the facet joints in degenerative lumbar spinal stenosis.

The Usefulness of the Dual Energy X-ray Absorptiometry(DEXA) for the Bone Density of the Tricortical Iliac Graft in the Spinal Interbody Fusion / 대한척추외과학회지

STUDY DESIGN: We analyzed the bone mineral density of the thoracolumbar spine after anterior interbody fusion in the thora-columbar spinal fractures. OBJECTIVES: To study the usefulness of the DEXA for the bone density of the tricortical iliac graft in the spinal interbody fusion. MATERIALS AND METHODS: We measured the bone mineral density using the DEXA(Hologic, QDR-2000) in 21 cases who had the anterior interbody fusion of the thoracolumbar spinal fractures. The average length of the graft was 43(35-50) milimeters. We assessed the percentage of the bone mineral density which were obtained by multiplying one hundred after the bone min-eral desity in central graft was divided by the average value of the bone mineral density in above and below vertebra of the fusion. RESULTS: The maximum percentage of the bone mineral density was 188% on the 42nd postoperative months in 6 cases of the L2 burst fracture, 164% on the 32nd postoperative months in 8 cases of L1 burst fracture, and 153% on the 38th stoperative months in 7 cases of T12 burst fracture. The cases which were followed rather than the maximum percentage of the bone min-eral density tended to decrease the percentage of the bone mineral density. CONCLUSION: The measurment of the bone mineral density using the DEXA is one of the useful method for evaluation of the tricortical iliac graft in the spinal interbody fusion.