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Soe Hee Ann - Top 30 Publications

Evaluation of the impact of statin therapy on the obesity paradox in patients with acute myocardial infarction: A propensity score matching analysis from the Korea Acute Myocardial Infarction Registry.

The phenomenon of obesity paradox after acute myocardial infarction (AMI) has been reported under strong recommendation of statin therapy. However, the impact of statin therapy on this paradox has not been investigated. This study investigated the impact of statin therapy on 1-year mortality according to obesity after AMI. A total of 2745 AMI patients were included from the Korea Acute Myocardial Infarction Registry after 1:4 propensity score matching analysis (n = 549 for nonstatin group and n = 2196 for statin group). Primary and secondary outcomes were all-cause and cardiac death, respectively. During 1-year follow-up, the incidence of all-cause (8.4% vs 3.7%) and cardiac (6.2% vs 2.3%) death was higher in nonstatin group than in statin (P < .001, respectively). In nonstatin group, the incidence of all-cause (7.2% vs 9.0%) and cardiac (5.5% vs 6.5%) death did not differ significantly between obese and nonobese patients. However, in statin group, obese patients had lower 1-year rate of all-cause (1.7% vs 4.8%) and cardiac (1.2% vs 2.9%) death (P < .05, respectively), and lower cumulative rates by Kaplan-Meier analysis of all-cause and cardiac death compared with nonobese patients (log-rank P < .05, respectively). The overall risk of all-cause death was significantly lower in obese than in nonobese patients only in statin group (hazard ratio: 0.35; P = .001). After adjusting for confounding factors, obesity was independently associated with decreased risk of all-cause death in statin group. In conclusion, the greater benefit of statin therapy for survival in obese patients is further confirmation of the obesity paradox after AMI.

Prediabetes is not a risk factor for subclinical coronary atherosclerosis.

There are limited data regarding the influence of glycemic status on the risk of subclinical coronary atherosclerosis on coronary computed tomographic angiography (CCTA) in asymptomatic individuals.

Sudden Cardiac Death with Myocardial Infarction after Free-flap Lower Extremity Reconstruction.

Thrombus and Plaque Erosion Characterized by Optical Coherence Tomography in Patients With Vasospastic Angina.

Vasospastic angina (VSA) can result in endothelial damage and thrombus formation. The aim of this study was to evaluate the incidence of thrombus and plaque characteristics at coronary spasm segments compared with nonspasm segments by using optical coherence tomography (OCT) in patients with suspected VSA.

Gender differences in plaque characteristics of culprit lesions in patients with ST elevation myocardial infarction.

There is limited research on plaque characteristics of ST elevation myocardial infarction (STEMI) patients according to the gender and age. 280 Consecutive STEMI patients who underwent VH-IVUS imaging on culprit before percutaneous coronary intervention (PCI) were enrolled in this study. Women were significantly older than men (69.8 ± 10 vs. 55.9 ± 11.3, p < 0.001). After propensity matching, men had higher plaque burden (79.7 ± 7.8 vs. 73.7 ± 13.0 %, p = 0.010), more fibro-fatty tissue (12.8 ± 9.9 vs. 9.5 ± 6.8 %, p = 0.04) and less dense calcium than women (8.4 ± 5.8 vs. 12.3 ± 8.7 %, p = 0.007). Subgroups dividing by 50, 65, 75 years old, plaque burden was higher in elderly men aged 66-75 years compared to the young men aged less than 50 (75.5 ± 9.2 vs. 68.4 ± 10.1 %, p = 0.012). And middle aged men ranged 51-65 years showed significantly more plaque burden at minimal lumen area site than matched aged women (77.5 ± 8.0 vs. 69.0 ± 17.6 %, p = 0.012). Elderly women aged 66-75 years showed significantly more necrotic core (28.6 ± 7.3 %) and dense calcium (14.9 ± 7.5 %) compared to all the younger or matched subgroups of men. These differences in plaque composition are blunted in the very elderly of men and women aged over 75 years. The findings may explain the gender differences in clinical prognosis in STEMI patients.

Serial Morphological and Functional Assessment of the Paclitaxel-coated Balloon for de Novo Lesions.

There is limited data on the serial morphological and functional assessment of paclitaxel-coated balloon treatment using coronary angiography, optical coherence tomography, and fractional flow reserve.

Remote Ischemic Preconditioning for the Prevention of Contrast-Induced Acute Kidney Injury in Diabetics Receiving Elective Percutaneous Coronary Intervention.

Remote ischemic preconditioning (RIPC) induces transient episodes of ischemia by the occlusion of blood flow in non-target tissue, before a subsequent ischemia-reperfusion injury. When RIPC is applied before percutaneous coronary intervention (PCI), the kidneys may be protected against ischemia-reperfusion injury and subsequently contrast-induced acute kidney injury (CI-AKI). The aim of this study was to evaluate the efficacy of RIPC for the prevention of CI-AKI in patients with diabetes with pre-existing chronic kidney disease (CKD) undergoing elective PCI.

Sirolimus-eluting stent is superior to paclitaxel-eluting stent for coronary intervention in patients with renal insufficiency: Long-term clinical outcomes.

Renal insufficiency (RI) is an independent risk factor for the adverse cardiovascular events. Long-term clinical outcome of percutaneous coronary intervention (PCI) in patients with RI is unknown especially in the era of first generation drug-eluting stents (DES). This study aims at comparing clinical outcomes between sirolimus-eluting stents (SES) and paclitaxel-eluting stents (PES) based on large scaled registry.

Thienopyridine reloading in clopidogrel-loaded patients undergoing percutaneous coronary interventions: The PRAISE study.

The impact of thienopyridine reloading on clinical outcomes, and residual high platelet reactivity (HPR) is unclear. We sought to compare the HRP-related effect of prasugrel and clopidogrel reloading in the already clopidogrel-loaded patients undergoing percutaneous coronary intervention (PCI).

Gender differences in risk factors and clinical outcomes in young patients with acute myocardial infarction.

There are limited data on the influence of gender on risk factors and clinical outcomes in young patients with acute myocardial infarction (AMI).

Serial Morphological Changes of Side-Branch Ostium after Paclitaxel-Coated Balloon Treatment of De Novo Coronary Lesions of Main Vessels.

The effects on the side-branch (SB) ostium, following paclitaxel-coated balloon (PCB) treatment of de novo coronary lesions of main vessels have not been previously investigated. This study was aimed at evaluating the serial morphological changes of the SB ostium after PCB treatment of de novo coronary lesions of main vessels using optical coherence tomography (OCT).

Comparison of Paclitaxel-Coated Balloon Treatment and Plain Old Balloon Angioplasty for De Novo Coronary Lesions.

This study compared the angiographic outcomes of paclitaxel-coated balloon (PCB) versus plain old balloon angioplasty (POBA) treatment for de novo coronary artery lesions. At present, there is no available data comparing the efficacy of PCB versus POBA for the treatment of de novo coronary lesions.

Anatomical and Physiological Changes after Paclitaxel-Coated Balloon for Atherosclerotic De Novo Coronary Lesions: Serial IVUS-VH and FFR Study.

To assess the serial changes of de novo coronary lesions treated with paclitaxel-coated balloon (PCB) using intravascular ultrasound virtual histology (IVUS-VH) and fractional flow reserve (FFR).

Prediction of Coronary Atherosclerotic Ostial Lesion with a Damping of the Pressure Tracing during Diagnostic Coronary Angiography.

When performing coronary angiography (CAG), diagnostic catheter intubation to the ostium can cause damping of the pressure tracing. The aim of this study was to determine the predictors of atherosclerotic ostial stenosis in patients showing pressure damping during CAG.

Segmental assessments of coronary plaque morphology and composition by virtual histology intravascular ultrasound and fractional flow reserve.

Fractional flow reserve (FFR) is an index for identifying functionally significant stenotic lesions. A FFR value of ≤0.75 is considered clinically significant and indicative of physiological ischemia. Focal lesions with 30-80 % stenosis by angiography with lesion lengths of less than 20 mm were selected from left anterior descending arteries of 74 patients. The analysis for the total lesion was processed first, and then each lesion was divided into three segments to assess the each segment. Data on plaque geometry and composition of two FFR groups, FFR ≤ 0.75 and FFR > 0.75, were compared by total and segmental analysis. Lesions with FFR ≤ 0.75 had more fibrofatty tissue (13.5 ± 7.4 vs. 10.2 ± 6.5%, p = 0.05) and less dense calcium (7.2 ± 5.3 vs. 11.9 ± 7.5%, p = 0.01) compared to lesions with FFR > 0.75. The content of necrotic core in mid segments was higher compared to proximal and distal segments (22.9 ± 10.6, 20.2 ± 10.9, 17.1 ± 11.2%, respectively, p = 0.032) in lesions with FFR > 0.75 but the difference was less obvious in lesions with FFR ≤ 0.75 (17.9 ± 9.9, 18.7 ± 9.9, 15.8 ± 9.0%, respectively, p = 0.533). Coronary lesions with FFR > 0.75 have larger content of dense calcium and slightly less fibrofatty tissue compared to lesions with FFR ≤ 0.75. While segmental plaque compositions for each segment show noticeable variations in lesions with FFR > 0.75 such as high concentrations of necrotic core in mid segment, these differences in each segment become obscure in FFR ≤ 0.75 and are evenly distributed across the lesion.

Fractional flow reserve-guided paclitaxel-coated balloon treatment for de novo coronary lesions.

To assess the safety and efficacy of fractional flow reserve (FFR) guided paclitaxel-coated balloon (PCB) treatment for de novo coronary artery lesions.

Noninvasive detection of myocardial ischemia: a case of magnetocardiography.

OCT-Defined Morphological Characteristics of Coronary Artery Spasm Sites in Vasospastic Angina.

The aim of this study was to define the morphological features of coronary artery spasm sites using optical coherence tomography (OCT) in patients with vasospastic angina (VSA).

Combined Usefulness of the Platelet-to-Lymphocyte Ratio and the Neutrophil-to-Lymphocyte Ratio in Predicting the Long-Term Adverse Events in Patients Who Have Undergone Percutaneous Coronary Intervention with a Drug-Eluting Stent.

The aim of this study was to investigate the combined usefulness of platelet-to-lymphocyte ratio (PLR) and neutrophil-to-lymphocyte ratio (NLR) in predicting the long-term adverse events in patients who have undergone percutaneous coronary intervention (PCI) with a drug-eluting stent (DES).

Assessment of stent edge dissections by fractional flow reserve.

Edge dissections after intervention have been studied with imaging techniques, however, functional assessment has not been studied yet. We investigated the relationship between fractional flow reserve (FFR) and the angiographic type of stent edge dissections and tried to assess the use of FFR-guided management for edge dissection.

Validation of magnetocardiography versus fractional flow reserve for detection of coronary artery disease.

Although magnetocardiography (MCG) has been proposed as a non-invasive technique with high accuracy for functional diagnosis of myocardial injury, the validation of MCG against fractional flow reserve FFR in diagnosing coronary artery disease (CAD) has not yet been established. The goal of the study was to determine the diagnostic accuracy of MCG versus invasively determined FFR in patients with suspected or known CAD.

Reproducibility of coronary artery calcium measurements using 0.8-mm-thickness 256-slice coronary CT.

Coronary artery calcium (CAC) measurement has been utilized as an important indicator of coronary artery disease and predictor of cardiovascular risk. The reproducibility of CAC measurements makes it clinically useful for the assessment of progression and regression of coronary atherosclerosis. This study assessed the reproducibility of the Agatston CAC score among patients undergoing 256-slice multidetector computed tomography (MDCT) scans using 0.8-mm slice thickness.

Differences in ward-to-cath lab systolic blood pressure predicts long-term adverse outcomes after drug-eluting stent implantation.

We sought to investigate the effect of ward-to-cath lab blood pressure (BP) differences on long-term clinical outcomes in patients undergoing percutaneous coronary intervention (PCI) with drug-eluting stent (DES). There are limited data available on the association between PCI with DES and BP differences on long-term clinical outcomes. This study enrolled 994 patients who underwent PCI with DES from March 2003 to August 2007. Resting BP was measured in a ward environment before transfer to the cardiac catheterization lab (cath lab), and again when the patient was laid down on the cath lab table. Patients were divided into two groups according to the difference in ward-to-cath lab systolic BP. Large difference group (n = 383) was defined as the absolute systolic difference of >20 mmHg and small difference group (n = 424) as the absolute systolic difference of ≤20 mmHg. The primary endpoints were all-cause mortality, cardiac death, nonfatal myocardial infarction and stroke. A total of 807 patients (mean age 60 ± 10 years, 522 males) received follow-up for 5.1 ± 2.4 years. The rate of all-cause mortality was significantly higher in the large difference group compared to the small difference group (6.6 vs. 2.8 %; adjusted hazard ratio (HR) 2.43; 95 % confidence interval (CI) 1.22-4.83; p = 0.012). There were higher cardiac deaths seen in the large difference group compared to the small difference group (3.9 vs. 1.4 %; adjusted HR 2.84; 95 % CI 1.1-7.31; p = 0.031). Stroke (2.4 vs. 1.2 %, p = 0.125) and TVR (3.7 vs. 1.7 %, p = 0.051) had higher trends in the large difference group compared to the small difference group. The composite of primary endpoints (all-cause mortality, cardiac death, nonfatal MI and stroke) occurred more frequently in the large difference group compared to the small difference group (10.0 vs. 6.4 %; adjusted HR 1.71; 95 % CI 1.04-2.81; p = 0.033). A difference in ward-to-cath lab systolic BP of >20 mmHg may contribute to increased adverse outcomes in the form of all-cause mortality and cardiac deaths in patients undergoing PCI with DES.

Better inflation time of stent balloon for second-generation drug-eluting stent expansion and apposition: an optical coherence tomography study.

We tried to determine the effect of stent balloon inflation time on stent expansion and apposition using optical coherence tomography.

Multi-modality imaging for stent edge assessment.

Optical coherence tomography (OCT) has a sufficiently high resolution to allow assessment of stent edge dissection (ED). The aims of the present study were as follows: (1) evaluation of the frequency of stent ED using OCT; (2) comparison of stent ED detection rates obtained using angiography, intravascular ultrasound (IVUS), and OCT; and (3) IVUS-Virtual Histology (IVUS-VH) evaluation of plaque composition at the site of stent EDs detected by OCT after percutaneous coronary intervention (PCI). Fifty-eight consecutive patients (59 lesions, 100 stent edges) who underwent balloon-expandable stent implantation and post-stent assessment with OCT and IVUS-VH were included. OCT revealed stent ED in 24.0 % (24 of 100) of stent edges after PCI with a balloon-expandable stent. In contrast, ED was detected in only 3.0 % (3 of 100) of stent edges using angiography and 4.0 % (4 of 100) of stent edges using IVUS. Plaque evaluation using IVUS-VH showed that the percent necrotic core (21.2 ± 8.3 vs. 13.4 ± 10.7 %, p = 0.001) and absolute dense calcium (2.9 ± 2.4 vs. 1.3 ± 2.2 mm(3), p = 0.0104) and dense calcium (13.8 ± 9.3 vs. 5.4 ± 5.8 %, p < 0.001) volumes were greater in the ED group than in the non-ED group. Thus, OCT is superior to conventional coronary angiography and IVUS in the identification of stent ED. In addition, the plaque composition at the ED site is characterized by a necrotic core and greater dense calcium levels than those observed at the non-ED site.

Aortic valve calcium score is associated with coronary calcified plaque burden.

The aim of this study was to investigate the association between the aortic valve calcium score (AVCS) and the coronary plaque burden using 64-slice multi-detector computed tomography (MDCT). Calcification of the aortic valve without significant aortic stenosis itself has been suggested to be a marker of atherosclerosis. In this study, we attempted to identify a quantitative correlation between AVCS and the coronary plaque burden assumed by the Gensini score. We retrospectively evaluated 200 patients (aged 40 - 88 years) who underwent MDCT and coronary angiography for chest pain. After exclusion of an aortic stenosis (peak velocity ≥ 2.0 m/s), the plaque burden of the coronary artery was determined by the Gensini score based on the plaque composition (calcified, mixed, or noncalcified plaque) of the CT angiogram. The calcific aortic valve group (AVCS > 0) showed no significant difference in the total plaque burden compared to the noncalcific aortic valve group (AVC = 0) (Gensini score 23.6 ± 15.1 versus 21.2 ± 17.5, P = 0.31). However, the calcified plaque burden was higher in the calcific aortic valve group (Gensini score by calcified plaque 9.1 ± 10.4 versus 5.5 ± 8.6, P = 0.008). In the subgroup of patients who had an AVCS of more than 90.0 (upper 75th percentile, n = 20), the AVCS showed a more significant correlation with the Gensini score by calcified plaque (r = 0.618, P < 0.01). Our results suggest that a high level of AVCS is associated with the calcified plaque burden of the coronary artery rather than the total plaque burden.

Remote ischemic preconditioning in hemodialysis: a pilot study.

Hemodialysis (HD)-induced myocardial ischemia is associated with an elevated cardiac troponin T, and is common in asymptomatic patients undergoing conventional HD. Remote ischemic preconditioning (RIPC) has a protective effect against myocardial ischemia-reperfusion injury. We hypothesized that RIPC also has a protective effect on HD-induced myocardial injury. Chronic HD patients were randomized to the control group or the RIPC group. RIPC was induced by transient occlusion of blood flow to the arm with a blood-pressure cuff for 5 min, followed by 5 min of deflation. Three cycles of inflation and deflation were undertaken before every HD session for 1 month (total 12 times). The primary outcome was the change in cardiac troponin T (cTnT) level at day 28 from baseline. Demographic and baseline laboratory values were not different between the control (n = 17) and the RIPC groups (n = 17). cTnT levels tended to decrease from day 2 in the RIPC group through to 28 days, in contrast to no change in the control group. There were significant differences in the change of cTnT level at day 28 from baseline [Control, median; -0.002 ng/ml (interquartile range -0.008 to 0.018) versus RIPC, median; -0.015 ng/ml (interquartile range -0.055 to 0.004), P = 0.012]. RIPC reduced cTnT release in chronic conventional HD patients, suggesting that this simple, cheap, safe, and well-tolerated procedure has a protective effect against HD-induced ischemia.

A primary left atrial leiomyosarcoma mimicking myxoma: echocardiographic findings.

Echocardiography is the initial imaging modality to delineate the cardiac mass. Clinically echocardiographic information about morphology, location, motion and hemodynamic consequences of the tumor is very important for decision making in terms of additional imaging studies and treatment. We present a case of left atrial leiomyosarcoma masquerading as myxoma preoperatively and discuss the echocardiographic features for distinguishing leiomyosarcoma from a benign tumor, such as myxoma.

Coronary CT angiography in patients with high calcium score: evaluation of plaque characteristics and diagnostic accuracy.

Our aim was to evaluate the plaque characteristics of coronary arteries related to significant stenosis with coronary CT angiography (CCTA) and to discuss the diagnostic accuracy of CCTA in patients with high calcium scores. After institutional review board approval, 110 patients (63 men; mean age: 67.1 ± 7.9 years) with Agatston scores >400 were retrospectively reviewed. Patients underwent Agatston calcium scoring and 64-slice CCTA, in addition to invasive coronary angiography (CAG). The composition (calcified, mixed, and non-calcified) and configuration (concentric, eccentric) of coronary artery plaques were analyzed on a per-segment basis by CCTA. We analyzed the differences in plaque composition and configuration between significant (≥ 50%) and non-significant (<50%) stenosis. Additionally, the diagnostic accuracy of stenosis according to plaque composition was evaluated by CCTA, using CAG as a reference method. Significant differences in plaque composition and configurations were observed between the two groups. In cases of significant stenosis, the proportions of concentric, mixed, and non-calcified plaques were significantly higher than those of eccentric and calcified plaques (P < 0.001). The sensitivity and positive predictive value of mixed (97.4, 87.6%) and non-calcified plaques (97.8, 95.7%) were significantly higher than those of calcified plaques (87.6, 67.2%). Although CCTA has limited value due to low diagnostic accuracy of calcified plaques, knowledge about the high frequencies of mixed and non-calcified plaques in significant stenosis help to make an accurate assessment of CAD with CCTA in patients with high calcium scores.

A case of rhabdomyolysis during hospitalization for acute hepatitis A.

A 29-year-old man was admitted to hospital with fever, myalgia, and sore throat. Initial laboratory findings were compatible with acute hepatitis; he was positive for the serologic marker for acute hepatitis A. On the 3rd day of admission, in spite of normalization of body temperature and a reduction in serum liver enzyme levels, serum levels of creatinine phosphokinase had increased up to 16,949 U/L. The patient recovered with supportive therapy and was discharged on the 12th day. We report a case of acute hepatitis A complicated by rhabdomyolysis during hospitalization.