Prognostic Value of Pulmonary Artery Oxygen Saturation in Pulmonary Embolism Requiring Endovascular Intervention.

This retrospective study evaluates the prognostic value of pulmonary artery oxygen saturation (PA O2) among patients who undergo mechanical intervention for pulmonary embolism (PE). Patients who died within 90 days had less PA O2, and a greater percentage of patients with a PA O2 of <50 died within 90 days of intervention. Regression analysis revealed an association of PA O2 with mortality that held true despite accounting for Pulmonary Embolism Severity Index (PESI) score and type of endovascular intervention. Receiver operator curve testing revealed PA O2 <50% to be inferior to PESI score but superior to Bova score in predicting mortality after mechanical PE intervention, with the combination of PA O2 <50% and PESI outperforming PESI and PA O2 in predicting mortality. Our pilot evaluation suggests preintervention PA O2 <50% to be associated with increased risk of all-cause mortality and may help identify patients at greatest risk of deterioration.

Outcomes With Intravascular Ultrasound and Optical Coherence Tomography Guidance in Percutaneous Coronary Intervention.

Intracoronary imaging has become an important tool in the treatment of complex lesions with percutaneous coronary intervention (PCI). This retrospective cohort study identified 1,118,475 patients with PCI from the Nationwide Readmissions Database from 2017 to 2019. Intravascular ultrasound (IVUS) and optical coherence tomography (OCT) were identified with appropriate International Classification of Diseases, Tenth Revision codes. The primary outcome was major adverse cardiac events. The secondary outcomes include net adverse clinical events (NACEs), all-cause mortality, myocardial infarction (MI) readmission, admission for stroke, and emergency revascularization. The multivariate Cox proportional hazard regression was used to adjust for demographic and co-morbid confounders. Of 1,118,475 PCIs, 86,140 (7.7%) used IVUS guidance and 5,617 (0.5%) used OCT guidance. The median follow-up time was 184 days. The primary outcome of major adverse cardiac events was significantly lower for the IVUS (6.5% vs 7.6%; hazard ratio [HR] 0.89, 95% confidence interval [CI] 0.86 to 0.91, p <0.001) and OCT (4.4% vs 7.6%; HR 0.69, 95% CI 0.61 to 0.79, p <0.001) groups. IVUS was associated with significantly lower rates of NACEs (8.4% vs 9.4%; HR 0.92, 95% CI 0.89 to 0.94, p <0.001), all-cause mortality (3.5% vs 4.3%; HR 0.85, 95% CI 0.82 to 0.88, p <0.001), readmission for MI (2.7% vs 3.0%; HR 0.95, 95% CI 0.91 to 0.99, p = 0.012), and admission for stroke (0.5% vs 0.6%; HR 0.86, 95% CI 0.78 to 0.95, p = 0.002). OCT was associated with significantly lower rates of NACEs (6.6% vs 9.4%; HR 0.81, 95% CI 0.73 to 0.89, p <0.001) and all-cause mortality (1.8% vs 4.3%; HR 0.51, 95% CI 0.42 to 0.63, p <0.001). Emergency revascularization was not significantly different with IVUS guidance. Readmission for MI, stroke, and emergency revascularization were not significantly different with OCT guidance. A subgroup analysis of patients with ST-elevation MI and non-ST-elevation MI showed similar results. In conclusion, the use of IVUS and OCT guidance with PCI were associated with significantly lower rates of morbidity and mortality in real-world practice.

Causes and Predictors of 30-Day Readmission in Patients With COVID-19 and ST-Segment-Elevation Myocardial Infarction in the United States: A Nationwide Readmission Database Analysis.

Background Rates, causes, and predictors of readmission in patients with ST-segment-elevation myocardial infarction (STEMI) during COVID-19 pandemic are unknown. Methods and Results All hospitalizations for STEMI were selected from the US Nationwide Readmissions Database 2020 and were stratified by the presence of COVID-19. Primary outcome was 30-day readmission. Multivariable hierarchical generalized logistic regression analysis was performed to compare 30-day readmission between patients with STEMI with and without COVID-19 and to identify the predictors of 30-day readmissions in patients with STEMI and COVID-19. The rate of 30-day all-cause readmission was 11.4% in patients with STEMI who had COVID-19 and 10.6% in those without COVID-19, with the adjusted odds ratio (OR) not being significantly different between the two groups (OR, 0.88 [95% CI, 0.73-1.07], P=0.200). Of all 30-day readmissions in patients with STEMI and COVID-19, 41% were for cardiac causes. Among the cardiac causes, 56% were secondary to acute coronary syndrome, while among the noncardiac causes, infections were the most prevalent. Among the causes of 30-day readmissions, infectious causes were significantly higher for patients with STEMI who had COVID-19 compared with those without COVID-19 (29.9% versus 11.3%, P=0.001). In a multivariable model, congestive heart failure, chronic kidney disease, low median household income, and length of stay ≥5 days were found to be associated with an increased risk of 30-day readmission. Conclusions Post-STEMI, 30-day readmission rates were similar between patients with and without COVID-19. Cardiac causes were the most common causes for 30-day readmissions, and infections were the most prevalent noncardiac causes.

Surgical and transcatheter left atrial appendage closure in patients with atrial fibrillation and hypertrophic cardiomyopathy.

BACKGROUND: Patients with hypertrophic cardiomyopathy (HCM) and atrial fibrillation (AF) are at increased stroke risk in comparison to those with non-valvular AF not affected by HCM. OBJECTIVES: To investigate the role of left atrial appendage closure (LAAC) in patients with HCM and AF. METHODS AND RESULTS: We identified patients with HCM and AF using the National Readmission Dataset. Patients were stratified based on LAAC status. The primary efficacy outcome was a composite of ischaemic and haemorrhagic stroke, TIA, and all-cause mortality. The primary safety outcome was a composite of major bleeding and pericardial complications. Patients were matched using inverse probability of treatment weighting. Cox-proportional hazard regression was applied to calculate the hazard ratio (HR) with a 95% confidence interval (CI) on matched cohorts. We identified 71 980 patients with HCM and AF. 1351 (1.9%) patients underwent LAAC. Two hundred and eighty-seven (21.2%) underwent transcatheter LAAC. LAAC was associated with a lower risk of the primary efficacy outcome (2.5% vs. 5.4%, HR: 0.38; 95% CI: 0.17-0.88; P = 0.024), the primary safety outcome (2.9% vs. 6.8%, HR: 0.39; 95% CI: 0.23-0.66, P = 0.001), and reduced major bleeding. The LAAC group trended towards a lower risk of ischaemic stroke and all-cause mortality. CONCLUSION: Surgical and transcatheter LAAC was associated with a lower risk of haemorrhagic stroke and major bleeding.

Coronary artery calcium, hepatic steatosis, and atherosclerotic cardiovascular disease risk in patients with type 2 diabetes mellitus: Results from the Dallas heart study.

INTRODUCTION: Cardiovascular disease (CVD) risk amongst those with type 2 diabetes (T2D) is heterogenous. The role of imaging-based cardiometabolic biomarkers (e.g., coronary artery calcium [CAC] score, and hepatic triglyceride content [HTC]) in CVD risk stratification in T2D is unclear. To better understand this, we sought to evaluate the individual and joint associations between CAC and hepatic steatosis (HS) with clinical atherosclerotic CVD (ASCVD) in Dallas Heart Study (DHS) participants with and without T2D. METHODS: We examined participants in the DHS, a multi-ethnic cohort study, without self-reported ASCVD. CAC scoring was performed via computed tomography with the mean of two consecutive scores used. HTC was measured using magnetic resonance spectroscopy, and HS was defined as HTC >5.5% The primary outcome was incident ASCVD, defined as coronary heart disease (CHD; myocardial infarction, percutaneous coronary intervention, or coronary artery bypass graft surgery), ischemic stroke, transient ischemic attack, or CVD death. Cox regression analyses, and interaction testing was performed to evaluate the individual and joint associations between CAC and HS with ASCVD. The association between HS and coronary heart disease was validated in the UK Biobank (UKB). RESULTS: A total of 1252 DHS participants were included with mean age 44.8 ± 9.3 years, mean body mass index 28.7 ± 5.9 kg/m2, 55% female, and 59% black with an overall prevalence of T2D of 9.7%. CAC scores were significantly higher (p < 0.01) and HS was significantly more prevalent in those with T2D (p < 0.01). Over a median of 12.3 years, 8.3% of participants experienced ASCVD events. The ASCVD event rate was significantly higher in participants with T2D (20.5% vs 7.0%, p < 0.01). Continuous CAC was associated with ASCVD events in the overall cohort regardless of T2D status with a significant interaction present between CAC and T2D status on ASCVD, Pinteraction = 0.02. HTC was not associated with ASCVD risk in participants without T2D but was inversely associated with risk in participants with T2D (HR 0.91, 95% CI 0.83-0.99 per 1% increase in HTC, p = 0.02), Pinteraction = 0.02. Amongst 37,266 UKB participants, 4.5% had T2D. CHD events occurred in 2.2% of participants, with 10.2% of events occurring amongst those with T2D. An inverse relationship between HTC and CHD was also found amongst those with T2D in UKB with a significant interaction between T2D status and HTC on CHD (HR per 1% increase in HTC 0.95, 95% CI 0.91-0.99, p = 0.01, Pinteraction = 0.02). CONCLUSIONS: In the DHS, we found that CAC was associated with ASCVD risk independent of T2D status. We did not observe an association between HTC and ASCVD in participants without T2D, but there was an inverse association between HTC and ASCVD in those with T2D that was replicated in the UKB cohort. Further investigation is warranted to understand the possible protective association of HS in participants with T2D.

Percutaneous thrombectomy in patients with intermediate- and high-risk pulmonary embolism and contraindications to thrombolytics: a systematic review and meta-analysis.

Catheter-directed interventions have slowly been gaining ground in the treatment of pulmonary embolism (PE), especially in patients with increased risk of bleeding. The goal of this study is to summarize the evidence for the efficacy and safety of percutaneous thrombectomy (PT) in patients with contraindications to systemic and local thrombolysis. We performed a systematic review and meta-analysis using MEDLINE, Cochrane, Scopus and the Web of Science databases for studies from inception to March 2022. We included patients with intermediate- and high-risk PE with contraindications to thrombolysis; patients who received systematic or local thrombolysis were excluded. Primary endpoint was in-hospital and 30-day mortality, with secondary outcomes based on hemodynamic and radiographic changes. Major bleeding events were assessed as a safety endpoint. Seventeen studies enrolled 455 patients, with a mean age of 58.6 years and encompassing 50.4% females. In-hospital and 30-day mortality rates were 4% (95% CI 3-6%) and 5% (95% CI 3-9%) for all-comers, respectively. We found a post-procedural reduction in systolic and mean pulmonary arterial pressures by 15.4 mmHg (95% CI 7-23.7) and 10.3 mmHg (95% CI 3.1-17.5) respectively. The RV/LV ratio and Miller Index were reduced by 0.42 (95% CI 0.38-46) and 7.8 (95% CI 5.2-10.5). Major bleeding events occurred in 4% (95% CI 3-6%). This is the first meta-analysis to report pooled outcomes on PT in intermediate- and high-risk PE patients without the use of systemic or local thrombolytics. The overall mortality rate is comparable to other contemporary treatments, and is an important modality particularly in those with contraindications for adjunctive thrombolytic therapy. Further studies are needed to understand the interplay of anticoagulation with PT and catheter-directed thrombolysis.

Prevalence of thoracic aortic aneurysm in patients referred for no/low-charge coronary artery calcium scoring: Insights from the CLARIFY registry.

Objective: Low-dose cardiac-gated chest CTs allow for simultaneous evaluation of coronary artery calcification and aortic size. We sought to evaluate the prevalence of thoracic aortic dilation (TAD) and thoracic aortic aneurysm (TAA) in a large cohort of patients undergoing coronary artery calcium (CAC) screening. Methods: We reviewed all patients from a large, prospective no-charge CAC screening program (CLARIFY, Clinicaltrials.gov NCT04075162) for whom measurements of the ascending aorta were available. TAD was defined as an ascending aortic diameter ≥4.0cm, while TAA was defined as ascending aortic diameter ≥ 4.5cm. We explored associations between patient characteristics, CAC, and the prevalence of TAD/TAA. Results: A total of 36,356 patients enrolled in the CLARIFY program underwent analysis for TAD/TAA. 3,130 patients (8.6%) had TAD and 237 (0.7%) had TAA. Patients with TAA were older (63±8 vs 59±10 years, p < 0.001), more likely to be male (87% vs 49%, p < 0.001), have higher BMI (32 vs 30 kg/m2, p < 0.001), and 10-year atherosclerotic cardiovascular disease estimated risk (18% vs 12%, p < 0.001). Similar differences were observed for individuals with TAD compared to individuals without TAD with respect to age (63 vs 59 years, p < 0.001), percent male (76% vs 46%, p < 0.001), BMI (32 vs 30 kg/m2, p < 0.001), and 10-year predicted risk (17% vs 11%, p < 0.001). CAC score was associated with prevalence of TAD (4.9% in those with CAC 0 to 16.5% in those with CAC≥400) and TAA (0.3% in those with CAC of 0 to 1.5% in those with CAC ≥400). Conclusion: In this large, prospective study of patients undergoing no-charge CAC screening, 8.6% had TAD (≥4.0cm) and 0.7% had TAA (≥4.5cm). Our results highlight a high yield of TAD/TAA diagnosis in this targeted cohort with cardiovascular risk factors and supports the role of no-charge CAC as a population-level strategy.

Cholesterol Pericarditis.

Cholesterol pericarditis is a rare condition characterized by a large, chronic cholesterol-rich pericardial effusion that often manifests with symptoms of heart failure. We report a case of an asymptomatic 51-year-old man with a massive cholesterol-rich pericardial effusion with echocardiographic evidence of impending tamponade. (Level of Difficulty: Advanced.).

Transcatheter aortic valve replacement in patients with aortic stenosis and cardiac amyloidosis.

Background: Though the co-prevalence of aortic stenosis (AS) and cardiac amyloidosis (CA) is increasingly recognized, the role of transcatheter aortic valve replacement (TAVR) in patients with CA remains unclear. Methods: The National Readmission Dataset (2016-18) and ICD-10 codes were used to identify those with CA and AS, in conjunction with TAVR status. The primary outcome was a composite of heart failure (HF) readmissions and all-cause mortality. All outcomes were followed up to 1-year with a median follow up time 172-days. Kaplan-Meier curves and multivariate cox-proportional hazard regression were used for time-to-event analysis. Results: Of 1,127 CA patients, 92 (8.2%) had undergone TAVR. Patients with CA who received TAVR were younger and more commonly had coronary artery disease (67.3% vs 44.2%). Teaching (93.6% vs 81.1%) and large hospitals (77.7% vs 59.3%) performed more TAVRs. In multivariate analysis, TAVR was associated with an improved primary outcome (8.9% vs 24.4%, HR:0.32; 95% CI 0.14-0.71, p = 0.007) and with reduced HF readmissions (3.8% vs 19.4%, HR:0.22; 95% CI 0.07-0.68, p = 0.008). All-cause mortality was numerically lower in TAVR patients with CA but did not reach statistical significance. Conclusions: CA patients who receive TAVR are younger, and the procedure is more commonly performed at large, teaching hospitals. TAVR was associated with a lower primary composite outcome of HF readmissions and all-cause mortality.