SGLT-2 inhibitors in patients with and without a history of heart failure: a meta-analysis

Background

Sodium-glucose co-transporter 2 (SGLT-2) inhibitors emerged as a new groundbreaking therapy for patients with heart failure. Recent evidence showed significant benefits in patients with heart failure with reduced ejection fraction (HFrEF), regardless of diabetic status. Whether these medications also improve outcomes in patients without a history of heart failure or with heart failure with preserved ejection fraction (HFpEF) remains unknown.

Purpose

We sought to perform an updated meta-analysis of randomized controlled trials to evaluate the effects of SGLT-2 inhibitors on cardiovascular (CV) outcomes according to the history and type of heart failure.

Methods

All randomized, placebo-controlled trials of SGLT-2 inhibitors reporting similar CV outcomes were evaluated for inclusion. PubMed was searched from January 1, 2010 to February 1, 2021. Articles were independently reviewed and selected by two reviewers. The primary outcome was the composite of first hospitalization for heart failure and CV death. Secondary outcomes included its single components and all-cause mortality. Pooled hazard ratios (HR) and 95% confidence intervals (CI) were used as effect estimates and calculated with a random-effects model. Heterogeneity was assessed with the I2 index, and random-effects meta-regression was used to assess the interaction between treatment effect and history of heart failure and type of heart failure (HFrEF vs. HFpEF).

Results

Data from eight trials and a total of 56,665 patients (n=31,609 in SGLT-2 group, n=25,056 in placebo group) were included. Five studies enrolled high-risk patients with diabetes mellitus, while 3 studies enrolled patients with symptomatic heart failure. SGLT-2 inhibitors reduced the risk of first hospitalization for heart failure and CV death in patients with (HR 0.75 95% CI 0.70–0.81) and without (HR 0.78 95% CI 0.67–0.90; Figure 1) a history of heart failure. Similarly, patients with (HR 0.85 95% CI 0.78–0.93) or without (HR 0.85 95% CI 0.74–0.98) a history of heart failure treated with SGLT-2 inhibitors had a significant reduction in all-cause mortality. SGLT-2 inhibitors reduced the risk of CV death regardless of the history of heart failure, although the reduction was border-line statistically significant in patients without a history of heart failure (HR 0.81 95% CI 0.66–1.00; Figure 2). All subgroup interaction testing between patients with and without a history of heart failure was negative for all the above endpoints. Among patients with HFpEF, SGLT-2 inhibitors were associated with a nonsignificant trend towards reduced risk of the primary outcome (HR 0.80 95% CI 0.63–1.02).

Conclusions

SGLT-2 inhibitors significantly improve CV outcomes in patients with or without history of heart failure, and this effect seems to be consistent among those with HFrEF and HFpEF.

Funding Acknowledgement

Type of funding sources: None. Figure 1. CV death or HF hospitalizationFigure 2. Meta-analysis CV death

Racial and ethnic differences in severity of coronary calcification among patients undergoing PCI: Results from a single-center multiethnic PCI registry

Background

Although population-based studies have demonstrated racial heterogeneity in coronary artery calcium (CAC) burden, the degree to which such associations extend to percutaneous coronary intervention (PCI) cohorts remains poorly characterized. We sought to evaluate the associations between race/ethnicity and CAC in a PCI population.

Methods

This single center retrospective study analyzed 1025 patients with prior CAC who underwent PCI between January 1, 2012 and May 15, 2020. Patients were grouped as non-Hispanic White (NHW, N = 779), non-Hispanic Black (NHB, N = 81) and Hispanic (H, N = 165). Associations between race and CAC (Agatston units) were examined using negative binomial regression while adjusting for baseline parameters.

Results

Among the 1025 patients (mean age 65.8, 70% male) who underwent PCI, NHW, NHB, and H populations had median CAC scores of 760, 500, and 462 Agatston units, respectively (p < 0.0001). Hispanic patients displayed a higher burden of diabetes mellitus, hypertension and hyperlipidemia compared with other groups. After adjusting for baseline differences and compared with NHW, the inverse association between Hispanic and CAC persisted (β = -324.1, p < 0.0001) whereas differences were not significant for NHB (β = -51.5, p = 0.67).

Conclusions

Despite a higher risk clinical phenotype, Hispanic patients who underwent PCI had significantly lower CAC compared with non-Hispanic patients. Thus, current risk stratification models using universalized CAC scores may underestimate the risk for the Hispanic population. Race/ethnicity-informed CAC thresholds may better guide clinical decisions.

Impact of sex on long-term cardiovascular outcomes of patients undergoing percutaneous coronary intervention for acute coronary syndromes

BACKGROUND

Women with acute coronary syndrome (ACS) generally present with more comorbidities and experience worse clinical outcomes compared with males. However, it is unclear whether this represents genuine sex-related difference or stems from clinical, procedural and socioeconomic factors.

METHODS

We analyzed consecutive patients undergoing percutaneous coronary intervention (PCI) for ST-segment elevation myocardial infarction (STEMI), non-STEMI or unstable angina at a single tertiary-care center. Exclusion criteria were unknown sex, age < 18 years and PCI with bare metal stent or without stent placement. The study population was stratified according to sex. The primary endpoint was major adverse cardiac and cerebrovascular events (MACCE) defined as the composite of death, spontaneous myocardial infarction, or stroke at 1 year. Secondary endpoints were individual components of MACCE, target vessel revascularization (TVR) and clinically significant bleeding.

RESULTS

Of the 7362 patients included, 5031 (68.3%) were men and 2331 (31.7%) women. Women were older and presented with a higher burden of comorbidities while men had more complex coronary anatomy. The incidence of 1 year MACCE was significantly higher among women (8.0% versus 5.6%; p < 0.01) compared to men. Women also experienced a higher rate of bleeding (2.3% vs. 1.4%; p = 0.02) while there were no differences between groups in terms of TVR (8.1% vs. 7.8%; p-value = 0.83). Differences in outcomes were attenuated after multivariable adjustment. Findings were consistent across ACS subgroups.

CONCLUSIONS

In a contemporary ACS population treated with drug-eluting stents, women experienced a higher crude rate of 1-year MACCE. This was no longer apparent after accounting for baseline imbalances.

A Personalized Approach to Chronic Kidney Disease and Cardiovascular Disease: JACC Review Topic of the Week

Cardiovascular disease is the most common cause of death in patients with end-stage renal disease (ESRD). The initiation of dialysis for treatment of ESRD exacerbates chronic electrolyte and hemodynamic perturbations. Rapid large shifts in effective intravascular volume and electrolyte concentrations ultimately lead to subendocardial ischemia, increased left ventricular wall mass, and diastolic dysfunction, and can precipitate serious arrhythmias through a complex pathophysiological process. These factors, unique to advanced kidney disease and its treatment, increase the overall incidence of acute coronary syndrome and sudden cardiac death. To date, risk prediction models largely fail to incorporate the observed cardiovascular mortality in the CKD population; however, multimodality imaging may provide an additional prognostication and risk stratification. This comprehensive review discusses the cardiovascular risks associated with hemodialysis, and explores the pathophysiology and the novel utilization of multimodality imaging in CKD to promote a personalized approach for these patients with implications for future research.

Characterization of Myocardial Injury in Patients With COVID-19

BACKGROUND

Myocardial injury is frequent among patients hospitalized with coronavirus disease-2019 (COVID-19) and is associated with a poor prognosis. However, the mechanisms of myocardial injury remain unclear and prior studies have not reported cardiovascular imaging data.

OBJECTIVES

This study sought to characterize the echocardiographic abnormalities associated with myocardial injury and their prognostic impact in patients with COVID-19.

METHODS

We conducted an international, multicenter cohort study including 7 hospitals in New York City and Milan of hospitalized patients with laboratory-confirmed COVID-19 who had undergone transthoracic echocardiographic (TTE) and electrocardiographic evaluation during their index hospitalization. Myocardial injury was defined as any elevation in cardiac troponin at the time of clinical presentation or during the hospitalization.

RESULTS

A total of 305 patients were included. Mean age was 63 years and 205 patients (67.2%) were male. Overall, myocardial injury was observed in 190 patients (62.3%). Compared with patients without myocardial injury, those with myocardial injury had more electrocardiographic abnormalities, higher inflammatory biomarkers and an increased prevalence of major echocardiographic abnormalities that included left ventricular wall motion abnormalities, global left ventricular dysfunction, left ventricular diastolic dysfunction grade II or III, right ventricular dysfunction and pericardial effusions. Rates of in-hospital mortality were 5.2%, 18.6%, and 31.7% in patients without myocardial injury, with myocardial injury without TTE abnormalities, and with myocardial injury and TTE abnormalities. Following multivariable adjustment, myocardial injury with TTE abnormalities was associated with higher risk of death but not myocardial injury without TTE abnormalities.

CONCLUSIONS

Among patients with COVID-19 who underwent TTE, cardiac structural abnormalities were present in nearly two-thirds of patients with myocardial injury. Myocardial injury was associated with increased in-hospital mortality particularly if echocardiographic abnormalities were present.

Are the minor high bleeding risk criteria of the academic research consortium truly minor? Insights from a high-volume tertiary care pci centre

Background

The Academic Research Consortium (ARC) has recently published a consensus-based definition to identify patients at high bleeding risk (HBR), reflected by a BARC 3 or 5 bleeding rate of ≥4% at 1 year after percutaneous coronary intervention (PCI). The HBR criteria included in the definition are divided into minor and major categories, with patients deemed to be at HBR if they fulfill at least one major or two minor criteria. As a result, patients who present with only one minor criterion are categorized as non-HBR.

Purpose

To compare the differences in baseline characteristics and 1-year bleeding and ischaemic outcomes between non-HBR patients undergoing PCI that present with only one minor HBR criterion versus those that do not fulfill any HBR criteria.

Methods

The study population consisted of all consecutive patients who underwent PCI with stent implantation in a single high-volume centre from January 2014 to December 2017. Patients were classified as non-HBR if they did not fulfill at least one major or two minor ARC-HBR criteria. The outcomes of interest were major bleeding (composite of peri-procedural and post-discharge bleeding), all-cause death, and myocardial infarction (MI) at 1 year. The Kaplan-Meier method was used for time-to-event analyses, with comparative risks being assessed using Cox regression.

Results

Of the 9,623 patients included in the analysis, 5,345 were classified as non-HBR. Within the non-HBR patients, 2,078 (38.9%) presented with only one minor HBR criterion and 3,267 (61.1%) presented with no HBR criteria. Non-HBR patients with one minor criterion were more often female, significantly older, with a higher burden of comorbidities such as diabetes mellitus, hypertension and hyperlipidaemia, and more likely to have multivessel disease as well as a history of prior MI and revascularisation, while non-HBR patients with no criteria were more likely to be smokers and have a higher BMI. Distribution of the minor HBR criteria within the group presenting with one minor criterion are illustrated in the figure. Non-HBR patients with only one minor criterion had a numerically higher rate of major bleeding compared to non-HBR patients with no criteria (3.6% vs. 2.9%, p=0.09). While the rate of all-cause death was significantly higher in the group with only one minor criterion (1.2% vs. 0.4%, p=0.004), there was no difference in the rate of MI between the two groups (2.1% vs. 1.9%, p=0.83). Hazard ratios comparing the two groups are presented in the figure.

Conclusions

Non-HBR patients presenting with only one minor criterion had a numerically higher rate of post-PCI bleeding and significantly higher mortality compared to those without any criteria. Nonetheless, the major bleeding rates of both groups at 1 year were less than the 4% cutoff to qualify as HBR according to the ARC definition, thereby supporting their inclusion as “minor” criteria in the recent ARC-HBR definition.

Figure 1

Funding Acknowledgement

Type of funding source: None

Long-term outcomes in high-bleeding risk patients undergoing PCI for acute coronary syndromes: results from a large single-center pci registry

Introduction

Current clinical guidelines recommend prolonged dual antiplatelet therapy (DAPT) following percutaneous coronary intervention (PCI) in patients presenting with acute coronary syndromes (ACS). However, an extended DAPT duration in high-bleeding risk (HBR) patients amplifies the risk of post procedural complications. Hence, clinicians often face the dilemma of prolonging DAPT duration to prevent recurrent ischaemic events at the expense of increasing the incidence of bleeding in high-risk patients. The actual incidence of ischaemic and bleeding events in this particular population is not well elucidated.

Purpose

To evaluate one-year ischemic and bleeding outcomes following PCI for ACS in a real-world HBR population as defined by the Academic Research Consortium (ARC) consensus document.

Methods

We included all patients who presented with ACS to a high-volume single PCI centre from 2012 to 2017 and underwent PCI with 2nd generation drug-eluting stent implantation. Patients were classified as HBR if they met ≥1 major or ≥2 minor criteria according to the recent ARC-HBR consensus. The outcomes of interest were major adverse cardiovascular events (MACE), a composite of all-cause death, myocardial infarction (MI), and target lesion revascularization (TLR), and major bleeding events, including both peri-procedural and post-discharge bleeding. All outcomes were assessed at 1-year follow-up. The Kaplan-Meier method was used for time-to-event analyses.

Results

Out of 6,097 ACS patients included in this analysis, 2,717 (44.6%) fulfilled the ARC-HBR definition. Compared to non-HBR group, HBR patients were more frequently female, older, more likely to have cardiovascular risk factors (e.g., diabetes, hypertension, and hyperlipidemia) and complex coronary artery disease (e.g., multi-vessel disease, bifurcation lesions, and calcification). The 1-year incidence of MACE was significantly higher in HBR patients (16.3% vs. 8.1%, HR 2.16, 95% CI [1.81–2.59], p&lt;0.001) (Figure 1A). This finding was driven by higher rates of all-cause death and MI (Figure 1B). The 1-year incidence of major bleeding was also significantly higher in HBR patients compared to non-HBR (11.1% vs. 3.1%, HR: 3.92, 95% CI 3.10–4.95; p&lt;0.001).

Conclusions

HBR patients undergoing PCI for ACS are not only subject to bleeding complications but are also at an increased risk for ischemic events and all-cause mortality.

Figure 1

Funding Acknowledgement

Type of funding source: None

Antithrombotic Therapy in Patients with Atrial Fibrillation Undergoing Percutaneous Coronary Intervention

Patients with atrial fibrillation who undergo percutaneous coronary intervention with drug-eluting stent implantation often require oral anticoagulation (OAC) and antiplatelet therapies. Triple antithrombotic therapy (OAC, a P2Y₁₂-receptor inhibitor, and aspirin) has been the default antithrombotic strategy. Evidence from randomized trials indicates, however, that a dual antithrombotic therapy strategy (OAC plus a P2Y₁₂-receptor inhibitor) reduces bleeding risk without increasing the risk of ischemic events. This review provides an overview of advancements in this field as well as European and North American guidelines and consensus documents to inform clinical decision making around antithrombotic therapies for patients with atrial fibrillation who undergo percutaneous coronary intervention.

Indirect comparison of the efficacy and safety of alirocumab and evolocumab: a systematic review and network meta-analysis

AIMS

Although alirocumab and evolocumab have both been associated with improved outcomes in patients with dyslipidaemia or established atherosclerotic cardiovascular disease, data on their respective performances are scarce. This study aimed at providing an indirect comparison of the efficacy and safety of alirocumab vs. evolocumab.

METHODS AND RESULTS

We conducted a systematic review and network meta-analysis of randomized trials comparing alirocumab or evolocumab to placebo with consistent background lipid-lowering therapy up to November 2018. We estimated the relative risk (RR) and the 95% confidence intervals (CIs) using fixed-effect model in a frequentist pairwise and network meta-analytic approach. A total of 30 trials, enrolling 59 026 patients were included. Eligibility criteria varied significantly across trials evaluating alirocumab and evolocumab. Compared with evolocumab, alirocumab was associated with a significant reduction in all-cause death (RR 0.80, 95% CI 0.66-0.97) but not in cardiovascular death (RR 0.83, 95% CI 0.65-1.05). This study did not find any significant differences in myocardial infarction (RR 1.15, 95% CI 0.99-1.34), stroke (RR 0.96, 95% CI 0.71-1.28), or coronary revascularization (RR 1.13, 95% CI 0.99-1.29) between the two agents. Alirocumab was associated with a 27% increased risk of injection site reaction compared to evolocumab; however, no significant differences were found in terms of treatment discontinuations, systemic allergic reaction, neurocognitive events, ophthalmologic events, or new-onset of or worsening of pre-existing diabetes.

CONCLUSION

Alirocumab and evolocumab share a similar safety profile except for injection site reaction. No significant differences were observed across the efficacy endpoints, except for all-cause death, which may be related to the heterogeneity of the studied populations treated with the two drugs.

The importance of the Heart Team evaluation before transcatheter aortic valve replacement: Results from the BRAVO-3 trial

BACKGROUND/OBJECTIVES

Clinicians use validated scores to risk-stratify patients undergoing transcatheter aortic valve replacement (TAVR). However, evaluation by the Heart Team often deems patients to be at higher risk than their formal scores suggest. We sought to assess clinical outcomes of TAVR patients defined as high-risk by the Heart Team's assessment versus the patient's logistic EuroSCORE (LES).

METHODS

The BRAVO-3 trial randomized patients at high risk (LES ≥ 18, or deemed inoperable by the Heart Team) to TAVR with periprocedural anticoagulation with unfractionated heparin versus bivalirudin. Endpoints included net adverse cardiac events (NACE: the composite of all-cause mortality, MI, stroke, or bleeding), major adverse cardiovascular events (MACE: death, MI, or stroke), the individual components of MACE, major vascular complications, BARC ≥ 3b bleeding and VARC life-threatening bleeding at 30 days. We compared patients deemed high-risk based on LES ≥ 18 versus high-risk by the Heart Team despite lower LES.

RESULTS

A total of 467/800 (58.4%) patients were deemed high-risk by the Heart Team despite LES < 18. After multivariable analysis, there were no differences in the odds of endpoints between groups (NACE, OR_LES≥18 : 1.32, 95% CI 0.86-2.02, p = .21; MACE, OR_LES≥18 : 1.27, 95% CI 0.72-2.25, p = .41; major vascular complications, OR_LES≥18 : 0.97, 95% CI 0.65-1.44, p = .88; BARC ≥3b, OR_LES≥18 : 1.38, 95% CI 0.82-2.33, p = .23; and VARC life-threatening bleeding, OR_LES≥18 : 0.99, 95% CI 0.69-1.41, p = .95).

CONCLUSION

Patients undergoing TAVR and labeled high-risk by LES ≥ 18 or Heart Team assessment despite LES < 18 have comparable short-term outcomes. Assignment of high-risk status to over 50% of patients is attributable to Heart Team's clinical assessment.

P5367Indirect comparison of the safety and efficacy of alirocumab and evolocumab: from a comprehensive meta-analysis of 30 randomized controlled trials

Background

Alirocumab and evolocumab, two proprotein convertase subtilisin–kexin type 9 inhibitors, have both been associated with improved outcomes in patients with atherosclerotic cardiovascular disease in addition to standard lipid-lowering therapies. However, their comparative safety and efficacy profiles are unknown.

Purpose

To compare the safety and efficacy of alirocumab versus evolocumab.

Methods

We conducted a systematic review and network meta-analysis of placebo-controlled randomized trials available up to November 2018 evaluating the safety and efficacy of alirocumab and evolocumab. We estimated risk ratio and 95% confidence intervals using fixed effect model in a frequentist pairwise and network metanalytic approach. The primary safety endpoints were any adverse events leading to treatment-discontinuation, injection site reaction, systemic allergic reaction, neurocognitive events, ophthalmologic events and new-onset of diabetes mellitus (DM) or worsening of pre-existing DM. The primary efficacy endpoints were all-cause and cardiovascular (CV) death, myocardial infarction (MI) and stroke. This study was registered in PROSPERO (CRD42018090768).

Results

A total of 30 trials, enrolling 59,026 patients were included in this analysis, of whom 13,607 received alirocumab and 17,931 received evolocumab. Mean weighted follow-up time was 2.5 years, with an exposure time of 144,907 patients-years. Eligibility criteria varied significantly across trials evaluating alirocumab and evolocumab. There were no significant differences between alirocumab and evolocumab in terms of safety endpoints, except for injection site reaction with a 27% increased risk of injection site reaction with alirocumab compared to evolocumab (Figure). Compared with evolocumab, alirocumab was associated with a reduction of all-cause death but not CV death. There were no significant differences in MI or stroke between alirocumab and evolocumab.

Conclusion

Alirocumab and evolocumab share a similar safety profile. No significant differences were observed across the efficacy endpoints, except for all-cause death, which may be related to heterogeneity of the studied populations between the two drugs.

Temporal Trends in Statin Prescriptions and Residual Cholesterol Risk in Patients With Stable Coronary Artery Disease Undergoing Percutaneous Coronary Intervention

Intensive low-density lipoprotein cholesterol (LDL-C) reduction with statins is recommended after elective percutaneous coronary intervention (PCI). We aimed to evaluate adherence to guideline-recommended statin therapy (GRST) and the rate of residual cholesterol risk (RCR) at follow-up after elective PCI. All patients who underwent elective PCI between January 2010 and May 2016 were prospectively included in this single-center study. GRST was defined as high-intensity statin (HIS) therapy for patients ≤75 years old and moderate-intensity statin (MIS) or HIS therapy for patients >75 years. RCR at follow-up was defined as <50% decrease in LDL-C with HIS or <30% with MIS for statin-naïve patients and as LDL-C >70 mg/dL for nonstatin-naïve patients. A total of 2,653 patients were included, with 1,304 (49.2%) discharged with GRST. There was a significant increase in the number of patients discharged with GRST over time from 44.2% in 2010 to 63.0% in 2016 (p <0.001). Conversely, RCR at follow-up was present in 1,120 patients (42.2%) overall and remained stable over time. Risk factors of RCR at follow-up were female gender (odds ratio [OR]: 1.38; 95% confidence interval [CI] 1.13 to 1.70), previous myocardial infarction (OR: 1.37; 95% CI 1.12 to 1.64), smoking (OR: 1.30; 95% CI 1.01 to 1.67), higher LDL-C level at baseline (OR: 1.22; 95% CI 1.18 to 1.25). The presence of RCR was associated with an increased adjusted risk of death within 1 year of the second LDL-C measurement (adjHR: 2.78; 95% CI 1.15 to 6.67). In conclusion, although the rate of GRST at discharge has improved significantly over time in patients who underwent elective PCI, the prevalence of RCR at follow-up has not changed appreciably suggesting that further implementation of guidelines as well as novel or more intensive pharmacotherapy may be warranted.

Patterns and Impact of Dual Antiplatelet Cessation on Cardiovascular Risk After Percutaneous Coronary Intervention in Patients With Acute Coronary Syndromes

The aim of this study was to examine the patterns and clinical impact of differing modes of dual-antiplatelet therapy (DAPT) cessation after percutaneous coronary intervention (PCI) in patients presenting with and without acute coronary syndromes (ACS). The PARIS (patterns of nonadherence to antiplatelet regimens in stented patients) registry was a multicenter study of 5,018 patients who underwent PCI. DAPT cessation was categorized as physician-recommended discontinuation, interruption, or disruption. Overall rates of 2-year DAPT discontinuation did not differ between non-ACS and ACS patients (38.8% vs 37.2%, p = 0.252). ACS patients were less likely to interrupt DAPT (8.5% vs 10.7% p<0.001), but were more likely to disrupt DAPT (16.4% vs 11.9%, p<0001). Adverse events after DAPT cessation were highest after disruption, intermediate with discontinuation, and lowest with interruption across both groups. Disruption of DAPT predicted MACE in both ACS patients (hazard ratio [HR] 2.89 [1.88 to 4.45; p<0.001]) and non-ACS patients (HR 2.08 [1.29 to 3.35; p = 0.002]). Interruption of DAPT predicated MACE in ACS patients (HR 2.72 [1.35 to 5.48]) but not in non-ACS patients (HR 0.44 [0.14 to 1.40]; p_interaction≤0.01). In conclusion, the incidence of DAPT cessation mode differs by presentation with or without ACS. Physician guided DAPT discontinuation was the most common mode of DAPT cessation and appears to be safe across both groups. There were higher rates of adverse events associated with the interruption of DAPT in ACS patients.

Temporal trends, determinants, and impact of high-intensity statin prescriptions after percutaneous coronary intervention: Results from a large single-center prospective registry

BACKGROUND

High-intensity statins (HIS) are recommended for secondary prevention following percutaneous coronary intervention (PCI). We aimed to describe temporal trends and determinants of HIS prescriptions after PCI in a usual-care setting.

METHODS

All patients with age ≤75 years undergoing PCI between January 2011 and May 2016 at an urban, tertiary care center and discharged with available statin dosage data were included. HIS were defined as atorvastatin 40 or 80 mg, rosuvastatin 20 or 40 mg, and simvastatin 80 mg.

RESULTS

A total of 10,495 consecutive patients were included. Prevalence of HIS prescriptions nearly doubled from 36.6% in 2011 to 60.9% in 2016 (P < .001), with a stepwise increase each year after 2013. Predictors of HIS prescriptions included ST-segment elevation myocardial infarction/non-ST-segment elevation myocardial infarction (odds ratio [OR] 4.60, 95% CI 3.98-5.32, P < .001) and unstable angina (OR 1.31, 95% CI 1.19-1.45, P < .001) as index event, prior myocardial infarction (OR 1.48, 95% CI 1.34-1.65, P < .001), and co-prescription of β-blocker (OR 1.26, 95% CI 1.12-1.43, P < .001). Conversely, statin treatment at baseline (OR 0.86, 95% CI 0.77-0.96, P = .006), Asian races (OR 0.73, 95% CI 0.65-0.83, P < .001), and older age (OR 0.90, 95% CI 0.88-0.92, P < .001) were associated with reduced HIS prescriptions. There was no significant association between HIS prescriptions and 1-year rates of death, myocardial infarction, or target-vessel revascularization (adjusted hazard ratio 0.98, 95% CI 0.84-1.15, P = .84), although there was a trend toward reduced mortality (adjusted hazard ratio 0.71, 95% CI 0.50-1.00, P = .05).

CONCLUSION

Although the rate of HIS prescriptions after PCI has increased in recent years, important heterogeneity remains and should be addressed to improve practices in patients undergoing PCI.

Determinants of Significant Out-Of-Hospital Bleeding in Patients Undergoing Percutaneous Coronary Intervention

BACKGROUND

 Although several variables have been identified as bleeding determinants (BDs), their occurrence and predictive value in patients undergoing percutaneous coronary intervention (PCI) in the real world remain unclear. We aimed to characterize the rate of BDs in patients undergoing PCI with stent implantation in a large volume tertiary centre.

METHODS

 We included patients undergoing coronary stenting at our institution from January 2012 to December 2016, and defined post-discharge bleeding (PDB) as bleeding requiring hospitalization or transfusion. Several BDs, identified by the PARIS bleeding and PRECISE-DAPT scores and inclusion criteria of the LEADERS FREE trial, were analysed.

RESULTS

 In a population of 10,406 subjects who underwent PCI, 2,938 patients (28.2%) had 1, 2,367 (22.8%) had 2 and 2,913 (28.0%) had ≥3 pre-specified BD. Compared with patients without PDB, subjects who experienced PDB were older (70.43 ± 11.94 vs. 65.90 ± 11.54 years, p < 0.0001) with a higher prevalence of common cardiovascular risk factors. One-year PDB occurred in 177 patients (2.4%), and consistently increased according to the number of BDs involved (1.12, 2.11 and 4.35%, respectively; p < 0.0001). Analogously, 1-year rates of post-discharge myocardial infarction or stent thrombosis increased according to the number of BDs (2.44, 3.38 and 4.87%, respectively; p < 0.0001). Only 7 BDs remained independently associated with PDB at 1 year, with anaemia, oral anticoagulant at discharge and malignancy representing the strongest predictors of such risk.

CONCLUSION

 Many risk factors predispose to PDB; they were often clustered together and conferred additive PDB risk at 1-year of follow-up.

Organizational Contributors to the Variation in Red Blood Cell Transfusion Practices in Cardiac Surgery: Survey Results From the State of Michigan

BACKGROUND

While large volumes of red blood cell transfusions are given to preserve life for cardiac surgical patients, indications for lower volume transfusions (1-2 units) are less well understood. We evaluated the relationship between center-level organizational blood management practices and center-level variability in low volume transfusion rates.

METHODS

All 33 nonfederal, Michigan cardiac surgical programs were surveyed about their blood management practices for isolated, nonemergent coronary bypass procedures, including: (1) presence and structure of a patient blood management program, (2) policies and procedures, and (3) audit and feedback practices. Practices were compared across low (N = 14, rate: 0.8%-10.1%) and high (N = 18, rate: 11.0%-26.3%) transfusion rate centers.

RESULTS

Thirty-two (97.0%) of 33 institutions participated in this study. No statistical differences in organizational practices were identified between low- and high-rate groups, including: (1) the membership composition of patient blood management programs among those reporting having a blood management committee (P= .27-1.0), (2) the presence of available red blood cell units within the operating room (4 of 14 low-rate versus 2 of 18 high-rate centers report that they store no units per surgical case, P= .36), and (3) the frequency of internal benchmarking reporting about blood management audit and feedback practices (low rate: 8 of 14 versus high rate: 9 of 18; P= .43).

CONCLUSIONS

We did not identify meaningful differences in organizational practices between low- and high-rate intraoperative transfusion centers. While a larger sample size may have been able to identify differences in organizational practices, efforts to reduce variation in 1- to 2-unit, intraoperative transfusions may benefit from evaluating other determinants, including organizational culture and provider transfusion practices.