Long-term outcomes of percutaneous revascularization for internal mammary artery-left anterior descending artery bypass failure.

Despite the excellent long-term results of internal mammary artery (IMA)-left anterior descending (LAD) bypass, percutaneous revascularization of IMA is sometimes required for IMA-LAD bypass failure. However, its clinical outcomes have not been fully elucidated. The aim of this study was to investigate the long-term clinical outcomes, including target lesion revascularization (TLR) following contemporary percutaneous revascularization of failed IMA bypass graft. We examined data of 59 patients who had undergone percutaneous revascularization of IMA due to IMA-LAD bypass failure at nine hospitals. Patients with IMA graft used for Y-composite graft or sequential bypass graft were excluded. The incidence of TLR was primarily examined, whereas other clinical outcomes including cardiac death, myocardial infarction, and target vessel revascularization were also evaluated. Mean age of the enrolled patients was 67.4 ± 11.3 years, and 74.6% were men. Forty patients (67.8%) had anastomotic lesions, and 17 (28.8%) underwent revascularization within three months after bypass surgery. Procedural success was achieved in 55 (93.2%) patients. Stent implantation was performed in 13 patients (22.0%). During a median follow-up of 1401 days (interquartile range, 282-2521 days), TLR was required in six patients (8.5% at 1, 3, and 5 years). Patients who underwent percutaneous revascularization within 3 months after surgery tended to have a higher incidence of TLR. Clinical outcomes of IMA revascularization for IMA-LAD bypass failure were acceptable.

Clinical Outcomes Following Emergent Percutaneous Coronary Intervention for Acute Total/Subtotal Occlusion of the Left Main Coronary Artery.

BACKGROUND: Data regarding the clinical features, outcomes and prognostic factors in patients presenting with acute total/subtotal occlusion of the unprotected left main coronary artery (LMCA) remain limited.Methods and Results:From a multi-center registry, 134 patients due to acute total/subtotal occlusion of the unprotected LMCA were reviewed. Emergency room (ER) status classification was defined according to the presence of cardiogenic shock and cardiopulmonary arrest (CPA) in the ER (class 1=no cardiogenic shock; class 2= cardiogenic shock but not CPA; and class 3=CPA). In-hospital mortality and cerebral performance category (CPC) as the endpoints were evaluated. One-half (67/134) of the enrolled patients presented with total occlusion of the unprotected LMCA. Regarding ER status classification, class 1, 2, and 3 were observed in 30.6%, 45.5%, and 23.9% of the patients, respectively. In-hospital mortality occurred in 73 (54.5%) patients; of the remaining patients, 52 (85.3%) could be discharged with a CPC 1 or 2. ER status classification (odds ratio 4.4 [95% confidence interval: 2.33-10.67]; P<0.001) and total occlusion of the unprotected LMCA (odds ratio 8.29 [95% confidence interval 2.93-23.46]; P<0.001) were strong predictors of in-hospital mortality. CONCLUSIONS: Acute total/subtotal occlusion involving the unprotected LMCA appeared to be associated with high in-hospital mortality. ER status classification and initial flow in the unprotected LMCA were significant predictive factors of in-hospital mortality.

Long-term renal outcomes after elective percutaneous coronary intervention in patients with advanced renal dysfunction.

The aim of the present study was to evaluate the renal outcomes, including the time course of renal function, after elective PCI in patients with advanced renal dysfunction and to assess the predictors of renal dysfunction progression. This is a subanalysis of a previous observational multicenter study that investigated long-term clinical outcomes in patients with advanced renal dysfunction (eGFR < 30 mL/min/1.73 m2), focusing on 151 patients who underwent elective PCI and their long-term renal outcomes. Renal dysfunction progression was defined as a 20% relative decrease in eGFR at 1 year from baseline or the initiation of permanent dialysis within 1 year. Progression of renal dysfunction at 1 year occurred in 42 patients (34.1%). Among patients with renal dysfunction progression, the decrease of renal function from baseline was not observed at 1 month but after 6 months of the index PCI. Baseline eGFR and serum albumin level were significant predictors of renal dysfunction progression at 1 year. Among 111 patients who had not been initiated on dialysis within 1 year, those with renal dysfunction progression had a significantly higher incidence of dialysis initiation more than 1 year after the index PCI than those with preserved renal function (p < 0.001). Among patients with advanced renal dysfunction who underwent elective PCI, 34.1% showed renal dysfunction progression at 1 year. The decrease in renal function was not observed at 1 month but after 6 months of the index PCI in patients with renal dysfunction progression. Furthermore, patients with renal dysfunction progression had poorer long-term renal outcomes.

Clinical outcomes after percutaneous coronary intervention in non-dialysis patients with acute coronary syndrome and advanced renal dysfunction.

BACKGROUND: Data about the clinical outcomes of ACS patients with advanced renal dysfunction (estimated glomerular filtration rate < 30 mL/min/1.73 m2) following percutaneous coronary intervention (PCI) are limited. METHODS: We examined the data obtained from 194 ACS patients with non-dialysis advanced renal dysfunction who underwent PCI at five hospitals. The primary composite endpoint was the incidence of major adverse cardiac and cerebrovascular events (MACCE: all-cause death, myocardial infarction, and ischemic stroke). RESULTS: Eighty patients (41.2%) were diagnosed with ST-elevation myocardial infarction (STEMI), and 117 patients (58.8%) with non-ST-elevation ACS (NSTE-ACS). Overall patients were followed for a median of 657.5 days. Cumulative incidence of MACCE at median follow-up was 32.3% (45.4% for STEMI and 23.4% for NSTE-ACS). Kaplan-Meier analysis demonstrated that patients in the STEMI group had significantly higher incidence of MACCE than those in the non-STEMI and unstable angina group (Log-rank p < 0.001). In-hospital MACCE rate was higher in the STEMI group than in the NSTE-ACS group, whereas post-discharge MACCE rate was comparable between the two groups. In the multivariate analysis, STEMI and Killip classification ≥ 2 were associated with in-hospital MACCE. On the other hand, body mass index and serum albumin at admission were independent predictors of post-discharge MACCE. CONCLUSIONS: Short- and long-term prognoses following PCI in non-dialysis patients with ACS and advanced renal dysfunction is still unfavorable. STEMI and Killip classification ≥ 2 were independent predictors for in-hospital MACCE, and body mass index and serum albumin were for post-discharge MACCE.

Influence of Preadmission Frailty on Short- and Mid-Term Prognoses in Octogenarians With ST-Elevation Myocardial Infarction.

BACKGROUND: Octogenarians, who are frequently frail, represent a large proportion of patients admitted for ST-segment elevation myocardial infarction (STEMI). We investigated the relationship between frailty, assessed by the Canadian Study of Health and Aging Clinical Frailty Scale (CFS), and short- and mid-term prognoses in octogenarian STEMI patients.Methods and Results:We used a multicenter registry data of 1,301 patients with STEMI undergoing percutaneous coronary intervention (PCI) between January 2014 and December 2016. Of them, 273 were retrospectively analyzed after categorization into 3 groups based on the preadmission CFS (CFS 1-3, 140 patients; CFS 4-5, 99 patients; and CFS 6-8, 34 patients). We evaluated the influence of CFS on overall mortality at 2 years and on non-home discharge, defined as the composite of in-hospital death and new transfer to a hospital or nursing home. During the study period (median, 565 days), the overall mortality and ratio of non-home discharge increased as CFS increased. After adjustment for multivariable analysis, the severely frail continued to be significantly associated with an increased risk of overall mortality (adjusted hazard ratio 2.37; 95% confidence interval [CI] 1.11-5.05; P=0.026) and non-home discharge (adjusted odds ratio 9.50; 95% CI 3.48-25.99; P<0.001). CONCLUSIONS: Frailty, as assessed by CFS, had an influence on short- and mid-term prognoses in octogenarian patients with STEMI.

Impact of high-density lipoprotein 3 cholesterol subfraction on periprocedural myocardial injury in patients who underwent elective percutaneous coronary intervention.

BACKGROUND: Periprocedural myocardial injury (PMI) is a major complication of percutaneous coronary intervention (PCI) and is associated with atherosclerotic coronary plaque and worse clinical outcomes. High-density lipoprotein cholesterol (HDL-C) is a protective factor for cardiovascular disease. However, the role of HDL-C subfractions, such as HDL2 cholesterol (HDL2-C) or HDL3 cholesterol (HDL3-C), in cardiovascular disease remains unclear. The purpose of the study was to investigate the relationship between HDL2-C and HDL3-C subfractions and the incidence of PMI in patients who underwent elective PCI. METHODS: We enrolled 129 patients who underwent elective PCI for stable angina pectoris. PMI was defined as an increase in high-sensitivity troponin T levels > 5 times the upper normal limit (> 0.070 ng/mL) at 24 h after PCI. Serum HDL-C subfractions (HDL2-C and HDL3-C) were assessed using ultracentrifugation in patients with and those without PMI. RESULTS: HDL3-C levels were significantly lower in patients with PMI than in those without (15.1 ± 3.0 mg/dL vs. 16.4 ± 2.9 mg/dL, p = 0.016) and had an independent and inverse association with PMI (odds ratio, 0.86; 95% confidence interval, 0.74-0.99; p = 0.038). When divided by the cut-off value of HDL3-C for PMI (14.3 mg/dL), the incidence of PMI was significantly higher in low HDL3-C patients than in high HDL3-C patients (51.2% vs. 30.2%, p = 0.020). CONCLUSIONS: HDL3-C was an independent inverse predictor of PMI in patients who underwent elective PCI.

Decreased Serum Albumin Predicts Bleeding Events in Patients on Antiplatelet Therapy After Percutaneous Coronary Intervention.

BACKGROUND: Antiplatelet therapy (APT) after percutaneous coronary intervention (PCI) prevents ischemic events with increased risk of bleeding. Little is known about the relationship between hypoalbuminemia and bleeding risk in patients receiving APT after PCI. This study investigated the association between serum albumin level and bleeding events in this population.Methods and Results:We enrolled 438 consecutive patients who were prescribed dual APT (DAPT; aspirin and thienopyridine) beyond 1 month after successful PCI without adverse events. The patients were divided into 3 groups according to serum albumin tertile: tertile 1, ≤3.7 g/dL; tertile 2, 3.8-4.1 g/dL; and tertile 3, ≥4.2 g/dL. Adverse bleeding events were defined as Bleeding Academic Research Consortium criteria types 2, 3, and 5. During the median follow-up of 29.5 months, a total of 30 adverse bleeding events were observed. Median duration of DAPT was 14 months. The tertile 1 group had the highest risk of adverse bleeding events (event-free rate, 83.1%, 94.3% and 95.8%, respectively; P<0.001). On Cox proportional hazards modeling, serum albumin independently predicted adverse bleeding events (HR, 0.10, 95% CI: 0.027-0.39, P=0.001, for tertile 3 vs. tertile 1). CONCLUSIONS: Decreased serum albumin predicted bleeding events in patients with APT after PCI.

Nutrition Status Predicts Severity of Vascular Calcification in Non-Dialyzed Chronic Kidney Disease.

BACKGROUND: Vascular calcification is a major complication in chronic kidney disease (CKD) that increases the risk of adverse clinical outcomes. Geriatric nutritional risk index (GNRI) is a simple nutritional assessment tool that predicts poor prognosis in elderly subjects. The purpose of the present study was to evaluate the correlation between GNRI and severity of vascular calcification in non-dialyzed CKD patients.Methods and Results:We enrolled 323 asymptomatic CKD patients. To evaluate abdominal aortic calcification (AAC), we used aortic calcification index (ACI) determined on non-contrast computed tomography. The patients were divided into three groups according to GNRI tertile. Median ACI significantly decreased with increasing GNRI tertile (15.5%, 13.6%, and 7.9%, respectively; P=0.001). On multivariate regression analysis GNRI was significantly correlated with ACI (ß=-0.15, P=0.009). We also investigated the combination of GNRI and C-reactive-protein (CRP) for predicting the severity of AAC. Low GNRI and high CRP were significantly associated with severe AAC, compared with high GNRI and low CRP (OR, 4.07; P=0.004). CONCLUSIONS: GNRI was significantly associated with AAC in non-dialyzed CKD patients.

Impact of right coronary artery dominance on the long-term mortality in the patients with acute total/subtotal occlusion of unprotected left main coronary artery.

BACKGROUND: Patients with a right dominant coronary artery anatomy account for a significant proportion of acute myocardial infarction cases, and this condition is associated with a better prognosis. However, there are limited data on the impact of coronary dominance on patients with acute total/subtotal occlusion of unprotected left main coronary artery (ULMCA). METHODS: This study aimed to assess the impact of right coronary artery (RCA) dominance on long-term mortality in patients with acute total/subtotal occlusion of the ULMCA. From a multicenter registry, 132 cases of consecutive patients who had undergone emergent percutaneous coronary intervention (PCI) due to acute total/subtotal occlusion of the ULMCA were reviewed. RESULTS: Patients were classified into two groups according to the size of their RCA (dominant RCA group, n = 29; non-dominant RCA group, n = 103). Long-term outcomes were examined according to the presence of dominant RCA. Cardiopulmonary arrest (CPA) occurred in 52.3 % of patients before revascularization. All-cause death was significantly lower in the dominant RCA group than in the non-dominant RCA group. In the Cox regression model, dominant RCA was an independent predictor of all-cause death, as well as total occlusion of ULMCA, collateral from RCA, chronic kidney disease, and CPA. Patients were further analyzed according to the degree of stenosis of the ULMCA; patients with non-dominant RCA and total occlusive ULMCA had the worst outcome compared with the other groups. CONCLUSIONS: A dominant RCA might improve long-term mortality in patients with acute total/subtotal occlusion of the ULMCA who were treated with PCI.

Incidence and predictors of frailty progression among octogenarians with ST-elevation myocardial infarction undergoing primary percutaneous coronary intervention.

BACKGROUND: Frailty is one of the most serious health problems in older individuals with cardiovascular disease. Moreover, frailty progression is associated with subsequent adverse outcomes; therefore, the prevention of frailty progression is an important clinical issue. However, the incidence and predictors of frailty progression following acute myocardial infarction have not yet been fully elucidated. METHODS: The present study is a sub-analysis of an observational multicenter registry retrospectively evaluating clinical outcomes of 288 octogenarians who underwent primary percutaneous coronary intervention (PCI) for ST-elevation myocardial infarction (STEMI) between January 2014 and December 2016 at five hospitals. We identified 244 patients who survived until discharge and evaluated frailty at baseline and discharge using the Clinical Frailty Scale (CFS). We defined frailty progression as an increase of at least one level in the CFS score at discharge from baseline and assessed the predictors of frailty progression. RESULTS: Frailty progression was observed in 29.5% of patients. Patients with frailty progression were older, had more severe conditions with a higher prevalence of Killip 4 status and mechanical circulatory support use, more frequently experienced in-hospital events such as stroke (4/72, 6% vs. 0/172, 0%, p = 0.007), and had longer hospital stays than those without frailty progression [19 (11-35) vs. 13 (9-19) days, p<0.01]. Multivariate analysis showed that age (odds ratio 1.08, 95% confidence interval 1.00-1.17, p = 0.046) and Killip 4 status at baseline (odds ratio 3.34, 95% confidence interval 1.26-8.85, p = 0.01) were significant predictors of frailty progression. CONCLUSIONS: In-hospital frailty progression was commonly observed in octogenarians with STEMI who underwent primary PCI and survived until discharge, and was associated with more severe clinical conditions.

Improved Renal Function After Percutaneous Coronary Intervention in Non-Dialysis Patients With Acute Coronary Syndrome and Advanced Renal Dysfunction.

BACKGROUND: The deterioration of renal function is a strong prognostic predictor in patients with coronary artery disease. Although percutaneous coronary intervention (PCI) has sometimes resulted in improved renal function (IRF) in acute coronary syndrome (ACS) patients, its clinical implications have not been fully elucidated. This study aimed to investigate the prevalence and predictors of IRF after PCI and its relationship with long-term renal outcomes. METHODS: In this retrospective observational cohort study, we examined data from 177 ACS patients with non-dialysis advanced renal dysfunction (estimated glomerular filtration rate [eGFR] < 30 mL/min/1.73 m2) who underwent PCI. Patients with and without IRF were compared in terms of baseline demographic, clinical, and procedural characteristics and renal outcomes. IRF was defined as a 20% increase in eGFR from baseline at 7 or 30 days after the index PCI. RESULTS: IRF was observed in 66 (37.3%) patients. ST-elevation myocardial infarction and shock during PCI were independent predictors of IRF. Patients were followed up for a median of 695 days. Kaplan-Meier analyses demonstrated that patients with IRF had the lower incidence of initiation of permanent dialysis than those without IRF (Log-rank P = 0.015). CONCLUSIONS: IRF was relatively common in non-dialysis patients with ACS and advanced renal dysfunction who underwent PCI. ST-elevation myocardial infarction and shock, which may be indicative of hemodynamic instability during PCI, were independent predictors of IRF. Further, IRF was associated with favorable renal outcomes. Hemodynamic stabilization may be important for improving the short-term and long-term renal outcomes of high-risk patients.

Association between discharge destination and mid-term mortality in octogenarian patients with ST-elevation myocardial infarction.

BACKGROUND: Owing to an increasing aging population, the number of elderly patients undergoing percutaneous coronary intervention (PCI) for ST-elevation myocardial infarction (STEMI) is escalating. The onset of STEMI in elderly patients may lead to increased frailty, resulting in failure of discharge to home despite survival. However, the association of discharge destination with prognosis has not been fully evaluated in this population. METHODS: Between January 2014 and December 2016, a total of 245 octogenarian STEMI survivors who underwent PCI (mean age, 84.4 years; male, 46.5%) were evaluated from a multicenter registry. The 2-year mortalities of the home discharge and non-home discharge groups were compared and analyzed using a Cox regression model. RESULTS: Non-home discharge, which was defined as transfer to another hospital or nursing home after STEMI, was seen in 36 patients. During the 2 years, 37 patients died (home discharge, 27 patients; non-home discharge, 10 patients). The most frequent cause of death was due to infection (21.6%), followed by sudden death (18.9%) and heart failure (16.2%). The cumulative all-cause mortality was significantly higher in the non-home discharge group than in the home discharge group [36.4% vs. 14.8%; hazard ratio (HR), 2.95; 95% confidence interval (CI), 1.43-6.10; p = 0.003]. After multivariate analysis, non-home discharge (adjusted HR, 2.62; 95% CI, 1.20-5.75; p = 0.016) together with left ventricular ejection fraction <40% (adjusted HR, 3.15; 95% CI, 1.57-6.31; p = 0.001), prior heart failure (adjusted HR, 4.88; 95% CI, 1.82-13.13; p = 0.002), target lesion in the left anterior descending artery (adjusted HR, 2.20; 95% CI, 1.12-4.32; p = 0.022), and serum albumin level <3.5 g/dL (adjusted HR, 2.13; 95% CI, 1.06-4.27; p = 0.034) remained significant predictors of all-cause mortality. CONCLUSION: Non-home discharge was associated with an increased risk of mid-term mortality in octogenarian STEMI survivors.

＜Editors' Choice＞ Prevalence of acute coronary syndrome during the pandemic of COVID-19 in the Tokai Region of Japan.

The outbreak of coronavirus disease 19 (COVID-19) has had a great impact on medical care. During the COVID-19 pandemic, the rate of hospital admissions has been lower and the rate of in-hospital mortality has been higher in patients with acute coronary syndrome (ACS) in Western countries. However, in Japan, it is unknown whether the COVID-19 pandemic has affected the incidence of ACS. In the study, eleven hospitals in the Tokai region participated. Among enrolled hospital, we compared the incidence of ACS during the COVID-19 pandemic (April and May, 2020) with that in equivalent months in the preceding year as the control. During the study period; April and May 2020, 248 patients with ACS were admitted. Compared to April and May 2019, a decline of 8.1% [95% confidence interval (CI) 5.2-12.1; P = 0.33] in admissions for ACS was observed between April and May 2020. There was no significant difference in the strategy for revascularization and in-hospital deaths between 2019 and 2020. In conclusion, the rate of admission for ACS slightly decreased during the COVID-19 pandemic, compared to the same months in the preceding year. Moreover, degeneration of therapeutic procedures for ACS did not occur.

Contrast-Induced Nephropathy and Long-Term Clinical Outcomes Following Percutaneous Coronary Intervention in Patients With Advanced Renal Dysfunction (Estimated Glomerular Filtration Rate <30 ml/min/1.73 m2).

The incidence of contrast-induced nephropathy (CIN) increases with the progression of renal dysfunction. Recent reports have shown that percutaneous coronary intervention (PCI) can be safely performed even in patients with advanced renal dysfunction by appropriate CIN-prevention strategies. However, data are limited regarding the occurrence and prognostic influence of CIN in patients with advanced renal dysfunction. We examined the data obtained from 323 consecutive patients with advanced renal dysfunction (eGFR <30 ml/min/1.73 m2) who underwent PCI at 5 hospitals. CIN was defined as a ≥25% increase in baseline serum creatinine levels and/or a ≥0.5 mg/dl increase in absolute serum creatinine levels within 72 hours after PCI. Incidence of all-cause death and the initiation of permanent dialysis were examined during follow-up. The prevalence of emergency/urgent PCI was 53.3%. Intravascular ultrasound was used in 266 patients (82.4%), and the volume of contrast used was 71.7 ± 57.2 ml. CIN was observed in 31 patients (9.7%). The median follow-up duration was 656 days (interquartile range 257-1143 days). The cumulative rates of all-cause death or the initiation of permanent dialysis, all-cause death, and the initiation of permanent dialysis were 38.1%, 25.9%, and 18.2%, respectively, at 2 years. A comparison between patients with and without CIN showed no significant intergroup differences in the occurrence of the aforementioned events. In conclusion, the incidence of CIN was not high in Japanese patients with advanced renal dysfunction in routine clinical practice. Whereas, the long-term prognosis following PCI is observed to be poor in this studied population, and CIN did not show a significant prognostic influence.

Clinical Impact of Circulating Irisin on Classified Coronary Plaque Characteristics.

BACKGROUND: Myokines are hormones secreted by skeletal muscles during physical activity. Low myokine levels may contribute to metabolic dysfunction and cardiovascular disorders. Irisin, a newly identified myokine, has been the focus of recent research. The aim of the present study was to analyze the association between circulating irisin levels and tissue characteristics of nonculprit left main coronary artery (LMCA) plaques with the use of integrated backscatter (IB) intravascular ultrasound (IVUS). METHODS: This observational study enrolled 55 Japanese patients following successful percutaneous coronary intervention for lesions in the left anterior descending arteries or left circumflex arteries. Circulating myokine levels, including myostatin, brain-derived neurotrophic factor, and irisin, were measured by an enzyme-linked immunosorbent assay. Tissue characteristics of LMCA plaque were evaluated by IB-IVUS. RESULTS: Circulating irisin levels were negatively associated with percent lipid volume (%LV) [r = -0.31 (95% CI, -2.52 to -0.21), P = 0.02] and positively associated with percent fibrous volume (%FV) [r = 0.32 (95% CI, 0.22-2.20), P = 0.02]. The optimal cutoff value of circulating irisin for the prediction of lipid-rich LMCA plaques was 6.02 µg/mL [area under the curve = 0.713, P < 0.01 (95% CI, 0.58-0.85)]. Multivariate linear regression analysis identified circulating irisin levels as independent predictors for %LV and %FV of the LMCA [ß = -0.29 (95% CI, -2.53 to -0.07), P = 0.04 and ß = 0.30 (95% CI, 0.10-2.23), P = 0.03, respectively]. CONCLUSIONS: Circulating irisin levels are significantly associated with tissue characteristics of nonculprit LMCA plaques.

Impact of post-dilatation on longitudinal stent elongation: An in vitro study.

OBJECTIVES: To evaluate whether balloon inflation for post-dilatation causes longitudinal stent deformation (LSD). METHODS AND RESULTS: Two stents, sized 2.5mm×28mm and 3.5mm×28mm (Nobori®, biodegradable polymer biolimus-eluting stent; Ultimaster®, biodegradable polymer sirolimus-eluting stent; Terumo Co., Tokyo, Japan), were deployed at nominal pressure in straight and tapered silicon vessel models. Then, post-dilatation was performed in two ways: dilatation from the distal (D-P group) or proximal (P-D group) side of the stent. Microscopic findings showed that the stents were elongated during every step of the procedure regardless of the post-dilatation method and type of vessel model. The D-P group showed linear elongation during each step of post-dilatation (straight model: 28.7±0.3mm vs. 29.9±0.3mm, p=0.002; tapered model: 28.0±0.1mm vs. 29.9±0.1mm, p<0.001). In contrast, in the P-D group, the most significant change was observed in the first step of post-dilatation and only slight changes were observed thereafter (straight model: 28.6±0.1mm vs. 29.5±0.1mm, p<0.001; tapered model: 28.2±0.1mm vs. 29.5±0.1mm, p<0.001). Optical frequency domain imaging analysis showed that the frequency of stent strut malapposition was positively correlated with the percentage change in stent length (r=0.74, p<0.0001). CONCLUSION: LSD was observed during every step of post-dilatation in both the straight and tapered vessel models. However, some differences were observed between the D-P and P-D groups. Minimizing stent strut malapposition may reduce the risk of LSD.

The combination assessment of lipid pool and thrombus by optical coherence tomography can predict the filter no-reflow in primary PCI for ST elevated myocardial infarction.

The usefulness of distal protection devices is still controversial. Moreover, there is no report on thrombus evaluation by using optical coherence tomography (OCT) for determining whether to use a distal protection device. The aim of the present study was to investigate the predictor of filter no-reflow (FNR) by using OCT in primary percutaneous coronary intervention (PCI) for ST-elevated acute myocardial infarction (STEMI).We performed preinterventional OCT in 25 patients with STEMI who were undergoing primary PCI with Filtrap. FNR was defined as coronary flow decreasing to TIMI flow grade 0 after mechanical dilatation.FNR was observed in 13 cases (52%). In the comparisons between cases with or without the FNR, the stent length, lipid pool length, lipid pool + thrombus length, and lipid pool + thrombus index showed significant differences. In multivariate analysis, lipid pool + thrombus length was the only independent predictor of FNR (OR 1.438, 95% CI 1.001 - 2.064, P < .05). The optimal cut-off value of lipid pool + thrombus length for predicting FNR was 13.1 mm (AUC = 0.840, sensitivity 76.9%, specificity 75.0%). Moreover, when adding the evaluation of thrombus length to that of lipid pool length, the prediction accuracy of FNR further increased (IDI 0.14: 0.019-0.25, P = .023).The longitudinal length of the lipid pool plus thrombus was an independent predictor of FNR and the prediction accuracy improved by adding the thrombus to the lipid pool. These results might be useful for making intraoperative judgment about whether filter devices should be applied in primary PCI for STEMI.

Impact of Skeletal Muscle Mass on Long-Term Adverse Cardiovascular Outcomes in Patients With Chronic Kidney Disease.

Sarcopenia, defined as skeletal muscle loss and dysfunction, is attracting considerable attention as a novel risk factor for cardiovascular events. Although the loss of skeletal muscle is common in chronic kidney disease (CKD) patients, the relation between sarcopenia and cardiovascular events in CKD patients is not well defined. Therefore, we aimed to investigate the relation between skeletal muscle mass and major adverse cardiovascular events (MACE) in CKD patients. We enrolled 266 asymptomatic CKD patients (median estimated glomerular filtration rate: 36.7 ml/min/1.73 m2). To evaluate skeletal muscle mass, we used the psoas muscle mass index (PMI) calculated from noncontrast computed tomography. The patients were divided into 2 groups according to the cut-off value of PMI for MACE. There were significant differences in age and body mass index between the low and high PMI groups (median age: 73.5 vs 69.0 years, p = 0.002; median body mass index: 22.6 vs 24.2 kg/m2, p <0.001, respectively). During the follow-up period (median: 3.2 years), patients with low PMI had significantly higher risk of MACE than those with high PMI (31.7% and 11.2%, log-rank test, p <0.001). The Cox proportional hazard model showed that low PMI is an independent predictor of MACE in CKD patients (hazard ratio 3.98, 95% confidence interval 1.65 to 9.63, p = 0.0022). In conclusion, low skeletal muscle mass is an independent predictor of MACE in CKD patients. The assessment of skeletal muscle mass may be a valuable screening tool for predicting MACE in clinical practice.

Impact of nutritional assessment and body mass index on cardiovascular outcomes in patients with stable coronary artery disease.

BACKGROUND: An inverse association between obesity, as defined by body mass index (BMI) and prognosis has been reported in patients with cardiovascular disease ("obesity paradox"). The aim of this study was to investigate whether adding nutritional information to BMI provides better risk assessment in patients undergoing elective percutaneous coronary intervention (PCI). METHOD: This study comprised 1004 patients undergoing elective PCI. We calculated each patient's controlling nutritional status (CONUT) score for nutritional screening at baseline. Patients were divided into 4 groups based on CONUT score (low, 0-1 [<75th percentile]; or high, ≥2 [≥75th percentile]) and BMI (normal, 18.5-24.9kg/m2; or high, ≥25kg/m2). The endpoint was major adverse cardiac events (MACE) defined as cardiac death and/or myocardial infarction. RESULTS: Low CONUT score+normal BMI, low CONUT score+high BMI, high CONUT score+normal BMI, and high CONUT score+high BMI were determined in 374, 242, 275, and 113 patients, respectively. During a median follow-up of 1779 days, 73 events occurred. High CONUT score+normal BMI showed a 2.72-fold increase in the incidence of MACE (95% CI 1.46-5.08, p=0.002) compared with low CONUT score+normal BMI after adjusting for confounding factors. On the other hand, no significant difference in the incidence of MACE was observed in the other three groups. CONCLUSION: The combination of CONUT score and BMI was a useful predictor of MACE in this population. Using BMI to assess the cardiovascular risk may be misleading unless the nutritional information is considered.