Pharmacogenetics of cardiovascular drugs.

PURPOSE OF REVIEW: Advances in pharmacogenomics have paved the way for personalized medicine. The purpose of this review is to summarize the background, rationale, and evidence for pharmacogenomics in cardiovascular medicine. RECENT FINDINGS: Randomized clinical trials have supported the role of a genotype-guided approach for antiplatelet therapy in patients with coronary artery disease undergoing percutaneous coronary interventions. Additionally, there is increasing evidence supporting the association of certain genetic variants and risk of statin associated muscle symptoms. Furthermore, germline genetic variation is being used as a biomarker to target patients with specific therapy. SUMMARY: Pharmacogenomics has the potential to improve patient care by providing the right drug to the right patient and could guide the identification of novel drug therapies for cardiovascular disease.

Ventricular non-compaction review.

Left ventricular non-compaction cardiomyopathy (LVNC) is a rare and unclassified cardiomyopathy that carries the potential to cause heart failure, arrhythmias, and embolic events within adults. The diagnosis of this cardiomyopathy can be based off a variety of echocardiographic, cardiac magnetic resonance (CMR), and computed tomography (CT) imaging criteria; none of which have been standardized to establish a firm diagnosis. This is further complicated by the observation from prior studies that LVNC may present as different forms of cardiomyopathy, each with its own subset of nuances that may change treatment strategies. Management of such cardiomyopathy has been debated in terms of anticoagulation, electrophysiologic studies to prevent arrhythmia, as well as heart failure prevention. Not enough data exists in regard to establishing firm guidelines for management. The following article aims to provide a comprehensive review in regard to the etiologies, pathogenesis, diagnostic criteria, management, and treatment of LVNC.

Atrial Fibrillation as a Predictor of Mortality in High Risk COVID-19 Patients: A Multicentre Study of 171 Patients.

PURPOSE: Certain patient demographics and biomarkers have been suggested to predict survival in patients infected with COVID-19. However, predictors of outcome in patients who are critically ill are unclear. MATERIALS AND METHODS: We performed a multicentre analysis of 171 consecutive patients with confirmed COVID-19 who were admitted to the intensive care unit (ICU) between 1 March 2020 and 30 April 2020 and were followed until 23 May 2020. Demographic data, past medical history, laboratory values, echocardiographic and telemetry data were analysed. Patient status was classified as either alive or deceased at hospital discharge or the end of follow-up period. RESULTS: Mean patient age was 66±13 and 57% were male. Mortality rate of this ICU cohort at the end of follow-up was 46.2%. A multivariable logistic regression analysis identified the presence or history of atrial fibrillation (Odds Ratio 4.8, p=0.004) as a significant cardiovascular attribute that contributed to increased mortality. CONCLUSION: Mortality of critically ill COVID-19 patients is high. This study suggests a relationship between atrial fibrillation and increased mortality from COVID-19. Early aggressive treatment patients with high risk characteristics, such as atrial fibrillation could improve clinical outcome.

A comparison of figure-of-8-suture versus manual compression for venous access closure after cardiac procedures: An updated meta-analysis.

BACKGROUND: Manual compression (MC) is the current standard to achieve postprocedural hemostasis in patients who need venous vascular access closure after cardiovascular procedures. Figure-of-8 (F8) suture for venous access closure has been reported to be a safe and efficacious alternative to MC. METHODS: A systematic search was done using PubMed, Google Scholar, EMBASE, SCOPUS, and ClinicalTrials.gov without language restriction up until April 15, 2020 for studies comparing F8 suture versus MC. Risk ratio (RR) and mean difference (MD) with 95% confidence interval (CI) were calculated using a random effects model. RESULTS: Time to achieve hemostasis was significantly reduced in the F8 arm [MD -21.04 min (95% CI: -35.66 to -6.42; P = .005)]. Access site bleeding was significantly lower in the F8 group [RR 0.35 (95% CI: 0.18 to 0.66; P = .001)] along with a lower incidence of hematoma formation [RR 0.42 (95% CI: 0.26 to 0.67; P = .0003)]. There was no significant difference in rates of fistula or pseudoaneurysm formation between the two groups. Overall access site complications were lower in the F8 arm [RR 0.38 (95% CI: 0.26 to 0.55; P < .00001)] and the effect was more pronounced for sheaths ≥10 Fr [RR 0.33 (95% CI: 0.18 to 0.60; P = .0003)]. There was lower postprocedural protamine use in the F8 group [RR 0.07 (95% CI: 0.01 to 0.36; P = .001)]. CONCLUSION: For large-bore venous access closure, the F8 suture results in a shortened time to achieve hemostasis along with a lower overall risk of access site complications and postprocedural protamine use.

Effect of combined renal denervation and pulmonary vein isolation in atrial fibrillation recurrence in hypertensive patients: A meta-analysis.

BACKGROUND: Atrial Fibrillation (AF) is the most common cardiac arrhythmia and hypertension is the most common risk factor associated with AF. The addition of renal sympathetic nerve denervation (RSDN) to pulmonary vein isolation (PVI) in AF patients with hypertension has been reported to improve clinical outcomes. METHODS: A systematic search was performed for studies on patients with AF and hypertension that compared RSDN with PVI versus PVI-alone. Risk ratio (RR) for categorical variables and mean difference (MD) for continuous variables with 95% confidence intervals were used. RESULTS: Seven studies with a total of 734 patients were included. A total of 340 patients were in the RSDN + PVI group (46.32%) and 394 (53.67%) in the PVI group. A total of 608 patients had paroxysmal AF (83%) while 126 patients had persistent AF (17%). At 12 months follow-up, RSDN + PVI decreased the overall risk of AF recurrence in hypertensive patients with RR 0.60 [95% CI 0.50-0.72, P < .00001]. A subgroup analysis performed in patients with drug-resistant hypertension showed a similar reduction in AF recurrence with RR 0.61 [95% CI: 0.47-0.79, P = .0002). Procedure duration MD + 28.05 min [95% CI: 18.88-37.23, P < .00001] and fluoroscopy duration MD + 5.59 min [95% CI: 3.31-8.19, P < .00001] were significantly longer with the RSDN + PVI group. There was no significant difference in complications between the two groups. CONCLUSION: The addition of RSDN to PVI in patients with AF and hypertension appears safe and decreases AF recurrence. Similar results were observed in patients with drug-resistant hypertension. Larger trials are needed to confirm these results.

Progression of Mild Mitral Annulus Calcification to Mitral Valve Dysfunction and Impact on Mortality.

BACKGROUND: Mitral annulus calcification (MAC) represents a degenerative process resulting in calcium deposition in the mitral valve apparatus. Mitral annulus calcification is associated with adverse clinical outcomes. We sought to examine the long-term significance of mild MAC and its relationship to subsequent mitral valve dysfunction (MVD) and mortality in patients without MVD on the initial echocardiogram. METHODS: A total of 1,420 patients with mild MAC and no MVD at baseline and 1 or more follow-up echocardiograms at least 1 year after the baseline echocardiogram were included in the analysis. For patients with >1 echocardiogram during follow-up, the last echocardiogram was used. The same criteria were used to identify 6,496 patients without MAC. Mitral valve dysfunction was defined as mitral regurgitation (MR) and/or mitral stenosis (MS) of moderate or greater severity. Mixed disease was defined as the concurrent presence of both moderate or greater MS and MR. The primary end point was development of MVD, and the secondary end point was all-cause mortality. RESULTS: For patients with mild MAC, age was 74 ± 10 years and 528 (37%) were female. Over a median follow-up of 4.7 (interquartile range, 2.7-6.9) years, 215 patients with mild MAC developed MVD, including MR in 170 (79%), MS in 37 (17%), and mixed disease in 8 (4%). In a multivariable regression model compared to patients without MAC, the presence of mild MAC was independently associated with increased mortality (hazard ratio = 1.43; 95% CI 1.24, 1.66; P < .001). Kaplan-Meier 4-year survival rates were 80% and 90% for patients with mild MAC and no MAC, respectively. CONCLUSIONS: Mild MAC observed on transthoracic echocardiography is an important clinical finding with prognostic implications for both valvular function and mortality.

Outcomes of transcatheter aortic valve replacement in patients with and without amyloidosis: A nationwide analysis from the United States.

BACKGROUND: Amyloidosis is a common comorbidity in elderly patients with aortic stenosis (AS) referred for transcatheter aortic valve replacement (TAVR). This study aims to assess the impact of amyloidosis on the clinical outcomes of TAVR. METHODS: This is a retrospective study of the National Inpatient Sample database that identified adult patients (≥18 years) with AS hospitalized for TAVR from 2016 through 2020 to compare outcomes in those with versus without amyloidosis. Our primary outcome was in-hospital mortality. Secondary outcomes included procedural complications, hospital length of stay (LOS), and total costs. TAVR trends in both cohorts were also evaluated. RESULTS: The total cohort included 304,710 patients with AS undergoing TAVR, of whom 410 had amyloidosis. Over the study period, TAVR trends increased significantly in patients with and without amyloidosis (both ptrend < 0.01). Patients with amyloidosis were more likely to be older males with atrial fibrillation/flutter, congestive heart failure, renal disease, and dementia compared to non-amyloidosis patients. After adjustment for baseline characteristics, patients with amyloidosis had similar odds of in-hospital mortality (adjusted odds ratio [aOR] 1.66, 95 % confidence interval [CI] 0.34-3.63), heart block (aOR 1.33, 95 % CI 0.84-2.10), permanent pacemaker insertion (aOR 0.67, 95 % CI 0.27-1.66), stroke (aOR 0.90, 95 % CI 0.32-3.13), acute kidney injury, major bleeding, blood transfusion, vascular complications, in addition to similar LOS (p = 0.21) and total costs (p = 0.18) compared to patients without amyloidosis. CONCLUSION: In patients with AS undergoing TAVR, comorbid amyloidosis is associated with similar in-hospital mortality and procedural complications compared to patients without amyloidosis.

End-Of-Life Care for Patients With End-Stage Heart Failure, Comparisons of International Guidelines.

Heart failure (HF) is a chronic, debilitating condition associated with significant morbidity, mortality, and socioeconomic burden. Patients with end-stage HF (ESHF) who are not a candidate for advanced therapies will continue to progress despite standard medical therapy. Thus, the focus of care shifts from prolonging life to controlling symptoms and improving quality of life through palliative care (PC). Because the condition and prognosis of HF patients evolve and can rapidly deteriorate, it is imperative to begin the discussion on end-of-life (EOL) issues early during HF management. These include the completion of an advance directive, do-not-resuscitate orders, and policies on device therapy and discontinuation as part of advance care planning (ACP). ESHF patients who do not have indications for advanced therapies or those who wish not to have a left ventricular assist device (LVAD) or heart transplant (HT) often experience high symptom burden despite adequate medical management. The proper identification and assessment of symptoms such as pain, dyspnea, nausea, depression, and anxiety are essential to the management of ESHF and may be underdiagnosed and undertreated. Psychological support and spiritual care are also crucial to improving the quality of life during EOL. Caregivers of ESHF patients must also be provided supportive care to prevent compassion fatigue and improve resilience in patient care. In this narrative review, we compare the international guidelines and provide an overview of end-of-life and palliative care for patients with ESHF.

Outcomes of Transcatheter Aortic Valve Implantation in Nonagenarians and Octogenarians (Analysis from the National Inpatient Sample Database).

Risks among nonagenarian (age ≥90 years) and octogenarian (age 80 to 89 years) patients who underwent transcatheter aortic valve implantation (TAVI) compared with clinically similar septuagenarian (age 70 to 79 years) patients remain unclear. This study aimed to assess the outcomes of TAVI in nonagenarians and octogenarians compared with septuagenarians. We conducted a retrospective cohort study using the National Inpatient Sample database to identify patients aged ≥70 years hospitalized for TAVI from 2016 to 2020 and to compare outcomes in nonagenarians and octogenarians versus septuagenarians. The primary outcome was in-hospital mortality. Secondary outcomes included procedural complications, length of stay (LOS), and total costs. The trends in in-hospital outcomes were evaluated. Results were adjusted for demographic/clinical factors. The total cohort included 263,325 patients hospitalized for TAVI, of whom 11.9% were nonagenarians, 51.1% octogenarians, and 37.0% septuagenarians. After adjustment, nonagenarians and octogenarians had higher odds of in-hospital mortality (adjusted odds ratio 1.80, 95% confidence interval 1.34 to 2.41 for nonagenarians; adjusted odds ratio 1.65, 95% confidence interval 1.35 to 2.01 for octogenarians), heart block, permanent pacemaker insertion, stroke, major bleeding, blood transfusion, and palliative care consultation than septuagenarians (all p <0.01). LOS was longer and the total costs were higher for nonagenarians and octogenarians (both p <0.01). Over the study period, in-hospital mortality decreased in nonagenarians (ptrend = 0.04), and major bleeding, permanent pacemaker insertion, LOS, and costs decreased in all patients aged ≥70 years (ptrend <0.01). In conclusion, nonagenarians and octogenarians who underwent TAVI have higher rates of mortality and procedure-related complications than clinically similar septuagenarians. Further research is necessary to optimize outcomes in this frail population.

Racial and Ethnic Disparities in the Use and Outcomes of Transcatheter Mitral Valve Replacement: Analysis From the National Inpatient Sample Database.

Background Racial and ethnic disparities in outcomes exist following many cardiac procedures. Transcatheter mitral valve replacement (TMVR) has grown as an alternative to mitral valve surgery for patients at high surgical risk. The outcomes of TMVR by race and ethnicity are unknown. We aimed to evaluate racial and ethnic disparities in the outcomes of TMVR. Methods and Results We analyzed the National Inpatient Sample database from 2016 to 2020 to identify hospitalizations for TMVR. Racial and ethnic disparities in TMVR outcomes were determined using logistic regression models. Between 2016 and 2020, 5005 hospitalizations for TMVR were identified, composed of 3840 (76.7%) White race, 505 (10.1%) Black race, 315 (6.3%) Hispanic ethnicity, and 345 (6.9%) from other races (Asian, Pacific Islander, American Indian or Alaska Native, Other). Compared with other racial and ethnic groups, Black patients were significantly younger and more likely to be women (both P<0.01). There were no significant differences between White, Black, and Hispanic patients in in-hospital mortality (5.2% versus 5.0% versus <3.5%; P=0.89) and procedural complications, including heart block (P=0.91), permanent pacemaker (P=0.49), prosthetic valve dysfunction (P=0.45), stroke (P=0.37), acute kidney injury (P=0.32), major bleeding (P=0.23), and blood transfusion (P=0.92), even after adjustment for baseline characteristics. Adjusted vascular complications were higher in Black compared with White patients (P=0.03). Trend analysis revealed a significant increase in TMVR in all racial and ethnic groups from 2016 to 2020 (Ptrend<0.05). Conclusions Between 2016 and 2020, Black and Hispanic patients undergoing TMVR had similar in-hospital outcomes compared with White patients, except for higher vascular complications in Black patients. Further comparative studies of TMVR in clinically similar White patients and other racial and ethnic groups are warranted to confirm our findings.

Sodium-Glucose Cotransporter-2 Inhibitors in Heart Failure With Mildly Reduced or Preserved Ejection Fraction: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.

BACKGROUND: Sodium-glucose cotransporter-2 inhibitors (SGLT2i) reduce the risk of heart failure (HF) hospitalizations and cardiovascular mortality among patients with HF and left ventricular ejection fraction (LVEF) ≤40%. There is emerging evidence of the benefits of SGLT2i in HF patients with a higher LVEF (>40%). We aimed to evaluate the benefits of SGLT2i in different subgroups of patients with HF and LVEF >40%. METHODS: We searched PubMed, EMBASE, clinicaltrials.gov, Cochrane, and Google Scholar for randomized controlled trials (RCTs) comparing outcomes of SGLT2i vs placebo in patients with HF and LVEF >40%. The hazard ratios (HRs) and 95% confidence intervals (CIs) in each study were used for the meta-analysis. The primary composite outcome (PCO) was HF hospitalization or cardiovascular mortality. Secondary outcomes included HF hospitalization, cardiovascular mortality, and all-cause mortality. RESULTS: Six RCTs with 15,989 patients were included (median follow-up = 27.3 months, 40.8% females). In patients with HF and LVEF >40%, SGLT2i were associated with significantly lower PCO compared to placebo (HR 0.80; 95% CI 0.74-0.86; P < 0.001). This was consistent across 10 of 13 subgroups examined, including LVEF. SGLT2i also reduced HF hospitalization but not cardiovascular or all-cause mortality. Patients <65 years old, from racial minorities, or from Asia receiving SGLT2i did not demonstrate a significant reduction in PCO. CONCLUSIONS: SGLT2i significantly reduce the combined risk of HF hospitalization or cardiovascular mortality among patients with HF and LVEF >40%. However, younger patients, racial minorities, and patients from Asia did not demonstrate such a reduction. Further research is necessary to identify the reasons for such disparities.

Transcatheter Aortic Valve Replacement in Bicuspid Versus Tricuspid Aortic Valve Stenosis: Meta-Analysis and Systemic Review.

Because of its anatomic and procedural complexities, bicuspid aortic valve (BAV) has been excluded from previous trials investigating transcatheter aortic valve replacement (TAVR). We aimed to compare the clinical outcomes of TAVR in BAV and tricuspid aortic valve patients. We searched the databases systematically from inception until March 2023 for studies that reported the outcomes of TAVR in BAV and tricuspid aortic valve patients. The primary focus was all-cause mortality at 1 year. Additional outcomes included outcomes at 30-day follow-up. Secondary and subgroup analyses were performed on propensity-matched patients, patients at low surgical risk, and based on the type of transcatheter valve type. We included 30 studies with a total of 193,274 patients who underwent TAVR, of which 14,353 patients had BAV stenosis. The rate of 1-year mortality was lower in the BAV group compared with the tricuspid group with the results reaching statistical significance (odds ratio [OR] 0.86, 95% confidence interval [CI] 0.75 to 0.98, p = 0.02). The rate of 30-day stroke, however, was higher in patients with BAV who underwent TAVR (OR 1.24, 95% CI 1.08 to 1.43, p <0.05). Other 30-day clinical outcomes were similar between the 2 groups. Similar outcomes were observed in secondary analysis of matched populations with less mortality and higher rate of stroke in patients with BAV (OR 0.84, 95% CI 0.72 to 0.96, p = 0.01, and OR 1.38, 95% CI 1.09 to 1.75, p <0.05, respectively). Comparing the outcomes for self-expandable and balloon-expandable valves resulted in similar results. Subgroup analysis of low-surgical-risk patients similarly showed lower 1-year mortality in patients with BAV (OR 0.67, 95% CI 0.50 to 0.91, p = 0.01), without difference in 30-day stroke between the 2 groups (OR 1.24, 95% CI 0.83 to 1.88, p = 0.30). In conclusion, this report indicates that TAVR is safe and feasible in patients with BAV, including patients at low surgical risk. The higher rate of 30-day stroke, however, warrants caution when pursuing TAVR in this population. More studies, specifically randomized trials, are still warranted to further assess the safety and the long-term outcomes in this group.

Cardiotoxicities of Novel Therapies in Hematological Malignancies: Monoclonal Antibodies and Enzyme Inhibitors.

Monoclonal antibodies (mAB) selectively target leukemia surface antigens and work by either blocking cell surface receptors or triggering the target cell's destruction. Similarly, enzyme inhibitors bind to complex molecular platforms and induce downstream mechanisms that trigger cell death. These are used in a variety of hematologic malignancies. Yet, they also elicit severe immune-mediated reactions as biological agents that require careful monitoring. Cardiovascular effects include cardiomyopathy, ventricular dysfunction, cardiac arrest, and acute coronary syndrome. While there have been scattered reviews of mAB and enzyme inhibitors, a consolidated resource regarding their cardiovascular risk profile is lacking. We provide general recommendations for initial screening and serial monitoring based on the literature.

Sex differences in permanent pacemaker implantation after transcatheter aortic valve replacement: a systematic review and meta-analysis.

BACKGROUND: There is limited evidence on the effect of sex on permanent pacemaker implantation (PPMI) after transcatheter aortic valve replacement (TAVR). The primary objective of this meta-analysis was to determine the role of sex among patients requiring PPMI post-TAVR. METHODS: A literature search was conducted using the SCOPUS, MEDLINE, and CINAHL databases for studies published until October 2022. Eligible studies included published randomized controlled trials (RCTs) and Observational Cohort Studies (OCS) articles that reported PPMI as an outcome of pacemaker status following TAVR. This study was performed per the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) Guidelines. Publication bias was estimated using a Funnel plot and Egger's test. Data were pooled using a random-effects model. The primary endpoint was the sex difference in PPMI after TAVR, with odds ratios and 95% confidence intervals (CIs) extracted. RESULTS: Data was obtained from 63 studies, and a total of 79,655 patients were included. The cumulative PPMI rate was 15.5% (95% CI, 13.6%-17.7%). The pooled analysis revealed that while there were more females than males undergoing TAVR (51.6%, 95% CI 50.4%-52.8%), males have a 14.5% higher risk for post-TAVR PPMI than females (OR 1.145, 95% CI 1.047-1.253, P < 0.01). CONCLUSIONS: Males are more likely to experience PPMI after TAVR than females. Further research needs to be done to better explain these observed differences in outcomes.

Transcatheter Aortic Valve Replacement-Associated Acute Kidney Injury: An Update.

BACKGROUND: Transcatheter aortic valve replacement (TAVR) is a relatively novel minimally invasive procedure for the treatment of symptomatic patients with severe aortic stenosis. Although it has been proven effective in improving mortality and quality of life, TAVR is associated with serious complications, such as acute kidney injury (AKI). SUMMARY: TAVR-associated AKI is likely due to several factors such as sustained hypotension, transapical approach, volume of contrast use, and baseline low GFR. This narrative review aims to present an overview of the latest literature and evidence regarding the definition of TAVR-associated AKI, its risk factors, and its impact on morbidity and mortality. The review used a systematic search strategy with multiple health-focused databases (Medline, EMBASE) and identified 8 clinical trials and 27 observational studies concerning TAVR-associated AKI. Results showed that TAVR-associated AKI is linked to several modifiable and nonmodifiable risk factors and is associated with higher mortality. A variety of diagnostic imaging modalities have the potential to identify patients at high risk for development of TAVR-AKI; however, there are no existing consensus recommendations regarding their use as of this time. The implications of these findings highlight the importance of identifying high-risk patients for which preventive measures may play a crucial role, and should be maximized. KEY MESSAGE: This study reviews the current understanding of TAVR-associated AKI including its pathophysiology, risk factors, diagnostic modalities, and preventative management for patients.

Direct Oral Anticoagulants Versus Vitamin K Antagonists in the Treatment of Left Ventricular Thrombi.

Left ventricular thrombi form due to the presence of Virchow's triad in patients with left ventricular systolic dysfunction. This complication increases the incidence of systemic embolization, hence anticoagulation is recommended to decrease this risk. Up to the present time, vitamin K antagonists are recommended by all societal guidelines for patients with left ventricular thrombi. Recently, several studies have investigated the role of different anticoagulants and yielded promising outcomes. This opinion article focuses on the evidence supporting vitamin K antagonists and direct oral anticoagulants in patients with left ventricular thrombi.

Efficacy and Safety of Direct Oral Anticoagulants in Patients With Antiphospholipid Syndrome: A Systematic Review and Meta-Analysis.

Due to a high risk of recurrent thromboembolism in patients with antiphospholipid syndrome (APS), long-term anticoagulation is recommended. For decades, vitamin K antagonists (VKAs) have been the gold standard for thromboprophylaxis in these patients. Due to the widespread use of direct oral anticoagulants (DOACs) in various thromboembolic conditions and their potential advantages compared to VKAs, several studies have been conducted to evaluate their safety and efficacy in APS. We performed a literature search using PubMed, Embase, and Cochrane databases for studies comparing DOACs to VKAs in patients with APS. Relative risk (RR) and the corresponding 95% confidence intervals (95% CI) were estimated for recurrent thromboembolic events, bleeding, and mortality. A total of 1437 patients pooled from 12 studies were analyzed. The risk of recurrent thrombosis, especially arterial thrombosis, doubled with DOACs compared to VKAs (RR 2.61, 95% CI 1.44-4.71; p=0.001). The risk further increased in patients with a triple-positive antiphospholipid antibody profile (RR 4.50, 95% CI 1.91-10.63; p=0.0006) and with the use of rivaroxaban (RR 1.95, 95% CI 1.10-3.45; p=0.02). The risk of major bleeding and mortality were not significantly different between the two arms. A trend favoring DOACs compared to VKAs was observed for all bleeding events.  This meta-analysis comes in agreement with previous studies and supports the use of VKAs in APS. Our study revealed that VKAs remain the gold standard for the management of APS, especially triple-positive APS. DOACs, particularly rivaroxaban, are not as effective in preventing recurrent thromboembolism in high-risk APS patients. Further studies are needed to evaluate the role of DOACs apart from rivaroxaban with a focus on their efficacy in the management of isolated or double-positive APS.

Interaction between bacteria and cholesterol crystals: Implications for endocarditis and atherosclerosis.

BACKGROUND: The interaction between pathogenic bacteria and cholesterol crystals (CCs) has not been investigated. However, CCs are found extensively in atherosclerotic plaques and sclerotic cardiac valves. Interactions between pathogenic bacteria and CCs could provide insights into destabilization of atherosclerotic plaques and bacterial adhesion to cardiac valves. METHODS: Staphylococcus aureus and Pseudomonas aeruginosa were used to assess in vitro bacterial adhesion to CCs and proliferation in the presence of CCs compared to plastic microspheres and glass shards as controls. Ex vivo studies evaluated bacterial adhesion to atherosclerotic rabbit arteries compared to normal arteries and human atherosclerotic carotid plaques compared to normal carotid arteries. Scanning electron microscopy (SEM) was used to visualize bacterial adhesion to CCs and confocal microscopy was used to detect cholesterol binding to bacteria grown in the presence or absence of CCs. RESULTS: In vitro, S. aureus and P. aeruginosa displayed significantly greater adhesion, 36% (p<0.0001) and 89% (p<0.0001), respectively, and growth upon exposure to CCs compared to microspheres or glass shards. Rabbit and human atherosclerotic arteries contained significantly greater bacterial burdens compared to controls (4× (p<0.0004); 3× (p<0.019), respectively. SEM demonstrated that bacteria adhered and appeared to degrade CCs. Consistent with this, confocal microscopy indicated increased cholesterol bound to the bacterial cells. CONCLUSIONS: This study is the first to demonstrate an interaction between bacteria and CCs showing that bacteria dissolve and bind to CCs. This interaction helps to elucidate adhesion of bacteria to sclerotic valves and atherosclerotic plaques that may contribute to endocarditis and plaque destabilization.

Genotype-Guided Use of P2Y12 Inhibitors: A Review of Current State of the Art.

The pharmacodynamics of the purinergic receptor type Y, subtype 12 (P2Y12) inhibitors has evolved. Our understanding of the metabolism of P2Y12 inhibitors has revealed polymorphisms that impact drug metabolism and antiplatelet efficacy, leading to genetic testing guided therapy. In addition, assays of platelet function and biochemistry have provided insight into our understanding of the efficacy of "antiplatelet" therapy, identifying patients with high or low platelet reactivity on P2Y12 therapy. Despite the data, the implementation of these testing modalities has not gained mainstream adoption across hospital systems. Given differences in potency between the three clinically available P2Y12 inhibitors, the balance between thrombotic and bleeding complications must be carefully considered, especially for the large proportion of patients at higher risk for bleeding. Here we review the current data for genetic and functional testing, risk assessment strategies, and guidelines for P2Y12 inhibitors guided therapy.

Left Atrial Appendage Closure Versus Oral Anticoagulation in Non-Valvular Atrial Fibrillation: A Systematic Review and Meta-Analysis.

BACKGROUND: Left atrial appendage closure (LAAC) devices are an alternative therapy in non-valvular atrial fibrillation (NVAF) patients with contraindications to oral anticoagulation (OAC). However, there are limited data about the clinical outcomes of LAAC devices compared to medical treatment. METHODS: A comprehensive research for studies comparing LAAC devices and OAC for patients with NVAF was performed from inception to January 1, 2021. A meta-analysis was performed using a random effect model to calculate odds ratios (OR) with 95% confidence intervals (CIs). RESULTS: Five studies were eligible that included a total of 4778 patients with a median-weighted follow-up period was 2.6 years. Compared to OAC, the LAAC device arm was associated with a lower risk of the composite of stroke, systemic embolism, and cardiovascular death (OR 0.71; 95% CI 0.51-1.00; p = 0.05). LAAC device arm was also associated with a lower risk of all-cause mortality (OR of 0.60, 95% CI 0.46-0.77; p < 0.0001), cardiovascular mortality (OR of 0.57, 95% CI 0.46-0.70; p < 0.00001), hemorrhagic stroke (OR of 0.19, 95% CI 0.07-0.50; p= 0.0006), all major bleeding (OR of 0.61, 95% CI 0.43-0.88; p = 0.007) and non-procedural major bleeding (OR of 0.46, 95% CI 0.32-0.65; p < 0.0001). There was no significant difference in all stroke, ischemic stroke, and systemic embolization between the two groups. CONCLUSIONS: Our meta-analysis showed lower all-cause mortality, cardiovascular mortality, hemorrhagic stroke, major bleeding, non-procedural major bleeding and the composite of stroke, systemic embolism, and cardiovascular death in the LAAC device arm when compared to OAC. However, the risk of all stroke, ischemic stroke, and systemic embolism were similar between the two arms.