One-Year Outcomes of Patients With Established Coronary Artery Disease Presenting With Acute Coronary Syndromes

Long-term outcomes after stent implantation in very small vessel coronary artery disease

BACKGROUND

Percutaneous coronary interventions (PCI) in very small vessel lesions represent an intriguing aspect of coronary artery disease (CAD). Uncertainty still exists in stent implantation in very small caliber vessels. This study aimed to evaluate the long-term outcomes of patients treated with 2.0-mm drug-eluting stent (DES).

METHOD

This retrospective observational study included 134 patients undergoing PCI with 2.0-mm zotarolimus DES from December 2016 to May 2020. The primary endpoint was major adverse cardiovascular events (MACE) at 2-year follow-up, which was composed of all-cause mortality, target vessel myocardial infarction, and ischemia-driven target lesion revascularization. Multiple logistic regression analysis was used to identify the independent predictors of MACE, and odds ratios (OR) and 95% confidence intervals (CI) were calculated.

RESULT

The lesions were diffuse (mean length 20.9 ± 5.51 mm) and belong to type B2/C lesions (90.3%). On follow-up, the MACE rate was 20.1% and mostly driven by late lumen loss demanding revascularization (11.9%). In multivariable analysis, chronic kidney disease (CKD) (OR: 4.291, 95% CI: 1.574-11.704, p = 0.004) and calcified lesions (OR: 3.688, 95% CI: 1.311-10.371, p = 0.013) were the independent predictors of subsequent cardiovascular events, whereas statin was associated with better outcomes (OR: 0.335, 95% CI: 0.119-0.949, p = 0.040).

CONCLUSION

2.0-mm DES is a feasible option for treating very small vessel CAD in complex lesions. Patients with CKD and calcified lesions carry the hazard of worse outcomes, and careful consideration should be taken before stenting in this high-risk population.

Comparison of clinical profiles and care for patients with incident versus recurrent acute coronary syndromes in France: Data from the MONICA registries

Background

Recurrence is common after an acute coronary syndrome (ACS). In order to better assess the prognosis for patients with ACS, we compared clinical profiles, treatments, and case fatality rates for incident vs. recurrent ACS.

Methods

We enrolled 1,459 men and women (age: 35–74) living in three geographical areas covered by French MONICA registries and who had been admitted to hospital for an ACS in 2015/2016. We recorded and compared the clinical characteristics and medical care for patients with an incident vs. a recurrent ACS.

Results

Overall, 431 (30%) had a recurrent ACS. Relative to patients with an incident ACS, patients with recurrence were older (p<0.0001), had a greater frequency of NSTEMI or UA (p<0.0001), were less likely to show typical symptoms (p = 0.045), were more likely to have an altered LVEF (p<0.0001) and co-morbidities. Angioplasty was less frequently performed among patients with recurrent than incident NSTEMI (p<0.05). There were no intergroup differences in the prescription of the recommended secondary prevention measures upon hospital discharge, except for functional rehabilitation more frequently prescribed among incident patients (p<0.0001). Although the crude 1-year mortality rate was higher for recurrent cases (14%) than for incident cases (8%) (p<0.05), this difference was no longer significant after adjustment for age, sex, region, diagnosis category and LVEF.

Conclusion

Compared with incident patients, recurrent cases were more likely to have co-morbidities and to have suboptimal treatments prior to hospital stay, reinforcing the need for secondary prevention.

Association Between Circulating Proprotein Convertase Subtilisin/Kexin Type 9 Concentrations and Cardiovascular Events in Cardiovascular Disease: A Systemic Review and Meta-Analysis

Background: A large amount of evidence suggests that proprotein convertase subtilisin/Kexin type 9 (PCSK9) inhibitors have clinical benefits in patients with cardiovascular disease (CVD). However, whether PCSK9 concentrations predict future cardiovascular (CV) events remains unclear.

Methods: We conducted a meta-analysis to investigate the ability of PCSK9 concentrations to predict future CV events in patients with established CVD. A comprehensive search of electronic databases was conducted in June 2021. We included relative risk (RR) estimates with 95% CI or events of interest.

Results: Eleven cohort studies including 8,471 patients with CVD were enrolled. The pooled RR of CV events for the increase in the circulating baseline PCSK9 concentrations by 1 SD showed a positive association in a random-effect model (RR 1.226, 95% CI: 1.055–1.423, P = 0.008). Similarly, the risk of the total CV events increased by 52% in the patients in the highest tertile compared with those in the lowest tertile of circulating PCSK9 concentrations (RR 1.523, 95% CI: 1.098–2.112, P = 0.012). The association between PCSK9 and CV events was stronger in stable patients with CVD, patients treated with statins, and Asian patients.

Conclusions: High PCSK9 concentrations are significantly related to the increased risk of future CV events. These results enrich the knowledge of PCSK9 function and suggest the further possible clinical role of PCSK9 inhibitors.

Relationship between the Severity of Coronary Artery Disease and Cardiovascular Risk Factors in Acute Coronary Syndrome: Based on Tehran Heart Center's Data Registry

Background: Acute coronary syndrome (ACS) is one of the main causes of mortality worldwide. We sought to evaluate the correlation between the severity of coronary artery disease (CAD) and conventional coronary artery risk factors in a large cohort of patients with ACS.

Methods: This study included all patients admitted to the coronary care unit with a diagnosis of ACS between 2003 and 2017. The patients were divided into 2 groups: 1) unstable angina and 2) myocardial infarction. The aims of this study were to evaluate the effects of the risk factors and extension of coronary artery stenosis in patients with ACS according to the Gensini score.

Results: Of a total 40 319 patients who presented with ACS, 18 862 patients (mean age =60.4±11.14 y, male: 67.2%) underwent conventional coronary angiography and met our criteria to enter the final analysis. The median of the Gensini score was 50 (25–88) in the study population. The multivariable analysis showed that age, sex, diabetes mellitus, hypertension, dyslipidemia, family history, cigarette smoking, opium consumption, and myocardial infarction increased the risk of positive Gensini scores. All the aforementioned risk factors, except cigarette smoking and opium consumption, increased the severity of stenosis in those with positive Gensini scores. The strongest relationship was seen vis-à-vis myocardial infarction, sex, and diabetes mellitus.

Conclusion: Our findings suggest that age, sex, diabetes mellitus, dyslipidemia, hypertension, family history, and myocardial infarction have significant effects on the severity of CAD. The obesity paradox in relation to CAD should be taken into consideration and needs further investigation in patients with ACS.

Inhibitors of Protein Convertase Subtilisin/Kexin 9 (PCSK9) and Acute Coronary Syndrome (ACS): The State-of-the-Art

Acute Coronary Syndrome (ACS) remains one of the most frequent causes of morbidity and mortality in the world. Although the age- and gender-adjusted incidence of ACS is decreasing, the mortality associated with this condition remains high, especially 1-year after the acute event. Several studies demonstrated that PCSK9 inhibitors therapy determine a significant reduction of major adverse cardiovascular events (MACE) in post-ACS patients, through a process of plaque modification, by intervening in lipid metabolism and platelet aggregation and finally determining an improvement in endothelial function. In the EVACS (Evolocumab in Acute Coronary Syndrome) study, evolocumab allows >90% of patients to achieve LDL-C < 55 mg/dL according to ESC/EAS guidelines compared to 11% of patients who only receive statins. In the EVOPACS (EVOlocumab for Early Reduction of low-density lipoprotein (LDL)-cholesterol Levels in Patients With Acute Coronary Syndromes) study, evolocumab determined LDL levels reduction of 40.7% (95% CI: 45.2 to 36.2; p < 0.001) and allowed 95.7% of patients to achieve LDL levels <55 mg/dL. In ODYSSEY Outcome trial, alirocumab reduced the overall risk of MACE by 15% (HR = 0.85; CI: 0.78-0.93; p = 0.0003), with a reduced risk of all-cause mortality (HR = 0.85; CI: 0.73-0.98: nominal p = 0026), and fewer deaths for coronary heart disease (CHD) compared to the control group (HR = 0.92; CI: 0.76-1.11; p = 0.38). The present review aimed at describing the beneficial effect of PCSK9 inhibitors therapy early after ACS in reducing LDL circulating levels (LDL-C) and the risk of major adverse cardiovascular events, which was very high in the first year and persists higher later after the acute event.

Improving STEMI management in the emergency department: Examining the role of minority groups and sociodemographic characteristics

OBJECTIVE

To evaluate whether a fast-track intervention program will reduce time-lags of patients with STEMI considering minority groups, various socioeconomic status (SES) and clinical risk factors.

METHODS

A retrospective-archive study was conducted according to clinical guidelines, comparing all STEMI patients (n = 140) admitted to the emergency department (ED) before (n = 60) and during (n = 80) implementation of the fast track intervention program. The program comprised four steps: (1) immediate bed rest, (2) marking patient chart, (3) assessing time-lags according to defined clinical guidelines, and (4) physician signing a dedicated sticker on the ECG.

RESULTS

The major ethnic group compared to other minority patients with STEMI were less delayed for physician examination (r = -0.398, p < 0.01), spent less time at ED (r = -0.541, p < 0.01) and reached percutaneous coronary intervention earlier (r = -0.672, p < 0.01). Patients with higher SES spent less time for physician (r = -338, p < 0.05) and in the ED (r = -0.415, p < 0.01). Before intervention patients with diabetes mellitus (DM) spent more time at ED compared to non DM patients, however during intervention this difference was blurred (β = -0.803, p < 0.001). Gaps regarding sociodemographic bias remained present throughout the intervention despite monthly staff evaluations considering patient cases.

CONCLUSIONS

The fast track intervention was associated with less time at ED and to cardiac reperfusion. Yet, sociodemographic bias was present. Our findings highlight the need for the healthcare profession to address the role of biases in disparities in healthcare.