Incomplete Recovery From Takotsubo Syndrome Is a Major Determinant of Cardiovascular Mortality.

BACKGROUND: Although there is an apparent rapid and spontaneous recovery of left ventricular ejection fraction (LVEF) in patients with Takotsubo syndrome (TTS), recent studies have demonstrated a long-lasting functional impairment in those patients. The present study sought to evaluate the predictors of incomplete recovery following TTS and its impact on cardiovascular mortality.Methods and Results:Patients with TTS between 2008 and 2018 were retrospectively enrolled at 3 different institutions. After exclusion of in-hospital deaths, 407 patients were split into 2 subgroups according to whether their LVEF was >50% (recovery group; n=341), or ≤50% (incomplete recovery group; n=66) at the chronic phase. Multivariate logistic regression analysis found that LVEF (odds ratio [OR]: 0.94; 95% confidence interval [CI]: 0.91-0.98; P<0.001) and C-reactive protein levels (OR: 1.11; 95% CI: 1.02-1.22; P=0.02) at discharge were independent predictors of incomplete recovery. At a median follow up of 52 days, a higher cardiovascular mortality was evident in the incomplete recovery group (16% vs. 0.6%; P<0.001). CONCLUSIONS: This study demonstrated that incomplete recovery after TTS is characterized by residual systemic inflammation and an increased cardiac mortality at follow up. Altogether, the present study findings determined that patients with persistent inflammation are a high-risk subgroup, and should be targeted in future clinical trials with specific therapies to attenuate inflammation.

Systemic Inflammatory Response Syndrome Is a Major Determinant of Cardiovascular Outcome in Takotsubo Syndrome.

BACKGROUND: Recent insights have emphasized the importance of inflammatory response in takotsubo syndrome (TTS). We sought to evaluate the predictors of systemic inflammatory response syndrome (SIRS) and its impact on cardiovascular mortality after TTS.Methods and Results:The 215 TTS patients were retrospectively included between September 2008 and January 2018. SIRS was diagnosed in 96 patients (44.7%). They had lower left ventricular ejection fraction (LVEF) on admission (34.5% vs. 41.9%; P<0.001) and higher peak brain natriuretic peptide and troponin. At a median follow-up of 518 days, SIRS was associated with increased in-hospital mortality (14.6% vs. 5.0%; P=0.019), overall mortality (29.4% vs. 10.8%; P=0.002), and cardiovascular mortality (10.6% vs. 2.1%; P=0.026). A history of cancer (OR, 3.36; 95% CI: 1.54-7.31; P=0.002) and LVEF <40% at admission (OR, 2.31; 95% CI: 1.16-4.58; P=0.017) were identified as independent predictors of SIRS. On multivariate Cox regression analysis, SIRS (HR, 12.8; 95% CI: 1.58-104; P=0.017), age (HR, 1.09; 95% CI: 1.02-1.16; P=0.01), and LVEF <40% at discharge (HR, 9.88; 95% CI: 2.54-38.4; P=0.001) were independent predictors of cardiovascular death. CONCLUSIONS: SIRS was found in a large proportion of TTS patients and was associated with enhanced myocardial damage and adverse outcome in the acute phase. At long-term follow-up, SIRS remained an independent factor of cardiovascular death.

Periprocedural Predictors of New-Onset Conduction Abnormalities After Transcatheter Aortic Valve Replacement.

BACKGROUND: New-onset conduction abnormalities (CAs) following transcatheter aortic valve replacement (TAVR) are associated with hospital rehospitalization and long-term mortality, but available predictors are sparse. This study sought to determine clinical predictors of new-onset left bundle branch block (LBBB) and new permanent pacemaker (PPM) implantation in patients undergoing TAVR.Methods and Results:We enrolled 290 patients who received SAPIEN 3 (Edwards Lifesciences, Irvine, CA, USA; n=217) or Evolut R (Medtronic, Minneapolis, MN, USA; n=73) from a prospective registry at Nouvel Hôpital Civil, Strasbourg, France between September 2014 and February 2018. Of 242 patients without pre-existing LBBB, 114 (47%) experienced new-onset LBBB and/or new PPM implantation. A difference between membranous septal length and implantation depth (∆MSID) was the only predictor of CAs for both types of valves. In the multivariate analysis, PR interval and ∆MSID remained as sole predictors of CAs. The risk for adverse clinical events, including all-cause death, myocardial infarction, stroke, and heart failure hospitalization, was higher for patients with CAs as compared with patients without CAs (hazard ratio: 2.10; 95% confidence interval: 1.26 to 3.57; P=0.004). CONCLUSIONS: Computed tomography assessment of membranous septal anatomy and implantation depth predicted CAs after TAVR with new-generation valves. Future studies are required to identify whether adjustment of the implantation depth can reduce the risk of CAs and adverse clinical outcomes.

Unexpected Problems of Antithrombotic Therapy with An Unusual Side Effect of Vitamin K Antagonists after Mitral Valve Replacement.

Except for bleeding complications, vitamin K antagonists (VKAs) are known to have few undesirable side effects. Herein is presented the case of a 45-year-old woman in whom liver damage was induced by fluindione and warfarin after mitral valve replacement. Hepatotoxicity is a rare complication of VKAs, both in the French National and Drug Safety registry and the medical literature. A diagnosis of VKA-induced drug damage was confirmed by the absence of other etiologies, the chronological sequence, recurrence after re-exposure to VKA, and rapid improvements after discontinuation of the drug. Despite possible cross-reactions between VKAs, the re-introduction of acenocoumarol was successfully achieved, with no recurrence of biological disturbances.

COVID-19 promotes endothelial dysfunction and thrombogenicity: role of proinflammatory cytokines/SGLT2 prooxidant pathway.

BACKGROUND: COVID-19 is associated with an increased risk of cardiovascular complications. Although cytokines have a predominant role in endothelium damage, the precise molecular mechanisms are far from being elucidated. OBJECTIVES: The present study hypothesized that inflammation in patients with COVID-19 contributes to endothelial dysfunction through redox-sensitive SGLT2 overexpression and investigated the protective effect of SGLT2 inhibition by empagliflozin. METHODS: Human plasma samples were collected from patients with acute, subacute, and long COVID-19 (n = 100), patients with non-COVID-19 and cardiovascular risk factors (n = 50), and healthy volunteers (n = 25). Porcine coronary artery endothelial cells (ECs) were incubated with plasma (10%). Protein expression levels were determined using Western blot analyses and immunofluorescence staining, mRNA expression by quantitative reverse transcription-polymerase chain reaction, and the level of oxidative stress by dihydroethidium staining. Platelet adhesion, aggregation, and thrombin generation were determined. RESULTS: Increased plasma levels of interleukin (IL)-1ß, IL-6, tumor necrosis factor-α, monocyte chemoattractant protein-1, and soluble intercellular adhesion molecule-1 were observed in patients with COVID-19. Exposure of ECs to COVID-19 plasma with high cytokines levels induced redox-sensitive upregulation of SGLT2 expression via proinflammatory cytokines IL-1ß, IL-6, and tumor necrosis factor-α which, in turn, fueled endothelial dysfunction, senescence, NF-κB activation, inflammation, platelet adhesion and aggregation, von Willebrand factor secretion, and thrombin generation. The stimulatory effect of COVID-19 plasma was blunted by neutralizing antibodies against proinflammatory cytokines and empagliflozin. CONCLUSION: In patients with COVID-19, proinflammatory cytokines induced a redox-sensitive upregulation of SGLT2 expression in ECs, which in turn promoted endothelial injury, senescence, platelet adhesion, aggregation, and thrombin generation. SGLT2 inhibition with empagliflozin appeared as an attractive strategy to restore vascular homeostasis in COVID-19.

Determinants and treatments of heart failure after transcatheter aortic valve implantation: moving up a notch.

Transcatheter aortic valve implantation (TAVI) has become an alternative to surgical aortic valve replacement for patients with symptomatic severe aortic stenosis in elderly and comorbid population. Significant improvement in heart function has been observed in patients undergoing TAVI, but numerous patients are readmitted to hospital for heart failure (HF). Moreover, repeat HF hospitalization is strongly associated with an adverse prognosis and increases the financial burden of health care. Although studies have identified pre-existing and post-procedural factors that contribute to HF hospitalization after TAVI, there is a paucity of data regarding optimal post-procedural pharmacological treatments. This review aims to provide an overview of the current understanding of mechanisms, determinants, and potential treatments of HF following TAVI. We first review the pathophysiology of left ventricular (LV) remodelling, coronary microcirculation disorder, and endothelial dysfunction in patients with aortic stenosis and then examine the impact of TAVI on these conditions. We then present evidence of various factors and complications that may interplay with LV remodelling and contribute to HF events after TAVI. Next, we describe the triggers and predictors of early and late HF rehospitalizations following TAVI. Lastly, we discuss the potential of conventional pharmacological treatments, including renin-angiotensin blockers, beta-blockers, and diuretics in TAVI patients. The paper explores the potential of newer drugs, including sodium-glucose co-transporter 2 inhibitors, anti-inflammatory drugs, and ion supplementation. Comprehensive knowledge in this field may aid in recognizing successful existing therapies, developing effective new treatments, and establishing dedicated patient care strategies during follow-up after TAVI.

Combination of Primary Hemostatic Disorders and Atrial Fibrillation Increases Bleeding Events Following Transcatheter Aortic Valve Replacement.

Background Patients with atrial fibrillation (AF) are likely to have a poor prognosis including bleedings following transcatheter aortic valve replacement (TAVR). Closure time of adenosine diphosphate (CT-ADP) is a primary hemostasis point-of-care test and is a predictor of bleeding events following TAVR. We aimed to evaluate the impact of ongoing primary hemostatic disorders on bleeding events in TAVR patients with AF. Methods We enrolled 878 patients from our prospective registry. The primary endpoint was VARC-2 major/life-threatening bleeding complications (MLBCs) at 1 year after TAVR and secondary endpoint was major adverse cardiac and cerebrovascular events (MACCEs) at 1 year, defined as a composite of all-cause death, myocardial infarction, stroke, and heart failure hospitalization. Ongoing primary hemostatic disorder was defined by a postprocedural CT-ADP >180 seconds. Results Patients with AF had a higher incidence of MLBCs (20 vs. 12%, p = 0.002), MACCE (29 vs. 20%, p = 0.002), and all-cause mortality (15 vs. 8%, p = 0.002) within 1 year compared to non-AF patients. When the cohort was split into four subgroups according to AF and CT-ADP >180 seconds, patients with AF and CT-ADP >180 seconds had the highest risk of MLBCs and MACCE. Multivariate Cox regression analysis confirmed that the patients with AF and CT-ADP >180 seconds had 3.9-fold higher risk of MLBCs, whereas those patients were no longer associated with MACCE after the adjustment. Conclusion In TAVR patients, AF with postprocedural CT-ADP >180 seconds was strongly associated with MLBCs following TAVR. Our study suggests that persistent primary hemostatic disorders contribute to a higher risk of bleeding events particularly in AF patients.

Outcomes of patients with active cancer undergoing transcatheter aortic valve replacement.

BACKGROUND: Cardiovascular disease and cancer are the two leading causes of mortality worldwide, and their association presents a therapeutic challenge. Current data regarding the prognosis of active cancer in patients undergoing transcatheter aortic valve replacement are conflicting. AIM: To determine the impact and prognosis of active cancer in transcatheter aortic valve replacement. METHODS: All consecutive patients with severe aortic stenosis treated by transcatheter aortic valve replacement between February 2010 and May 2019 were enrolled in a prospective study. The cohort was divided according to the presence or absence of active cancer at baseline. The primary endpoint was all-cause mortality 1 year after the procedure. RESULTS: A total of 1,125 patients were enrolled: 1,037 (92.2%) without and 88 (7.8%) with active cancer. The most frequent cancers were haematological (36.4%), breast (14.8%) and prostate (14.8%), with 79.5% of patients receiving curative treatment and 17.0% receiving palliative treatment. The 1-year mortality rate was higher in patients with active cancer (27.3% vs. 13.9%; P<0.01), mainly driven by non-cardiovascular causes. An increased cardiovascular mortality rate at 2 years was seen in patients with active cancer (27.5% vs. 15.0%; P=0.03) compared with a similar rate at 1-year follow-up. Active cancer was a strong predictor of 1-year all-cause mortality (hazard ratio 2.46, 95% confidence interval 1.19-4.68; P=0.02). Major/life-threatening bleeding events at 1 year were more frequent in patients with active cancer (P=0.02). CONCLUSIONS: Among patients who undergo transcatheter aortic valve replacement, 1-year all-cause mortality is higher in those with active cancer. We also observed a trend towards increased long-term bleeding events in case of active cancer.

P2Y12 inhibition by clopidogrel increases adverse clinical events after transcatheter aortic valve replacement.

BACKGROUND: Dual antiplatelet therapy (DAPT) has been proposed to explain the increased occurrence of bleeding events after transcatheter aortic valve replacement (TAVR) despite no relevant study exploring the extent of platelet inhibition. In the present study, we sought to assess whether P2Y12 inhibition by clopidogrel impacts clinical outcomes in TAVR patients. METHODS: Patients were enrolled in a prospective registry at Nouvel Hôpital Civil, Strasbourg, France between February 2010 and May 2019. Vasodilator-stimulated phosphoprotein (VASP) flow cytometry test was assessed 24 h after the procedure. Responder to clopidogrel was defined by a platelet reactivity index ≤50%. The primary endpoint was 90-day major adverse cardiac and cerebrovascular events (MACCE), including all-cause death, myocardial infarction, stroke, and heart failure hospitalization. RESULTS: Of the 828 patients with available VASP monitoring, 491 TAVR patients received preprocedural clopidogrel therapy. Responders were identified in 22% (n = 110) and low responders in 78% (n = 381) of patients. By multivariate Cox regression analysis, responders to clopidogrel (hazard ratio [HR]: 2.09; 95% confidence interval [CI]: 1.13 to 3.79: p = 0.02) and previous PCI (HR: 2.16; 95% CI: 1.02 to 4.68; p = 0.04) were identified as independent predictors of 90-day MACCE. The cumulative event-free survival rate at 90-day was significantly lower in the responder group (p = 0.008; log rank test). CONCLUSIONS: In conclusion, appropriate P2Y12 inhibition by clopidogrel is a major determinant of MACCE at 90 days after TAVR. The present data challenge DAPT as a standard therapy during TAVR.

Electrocardiographic Strain Pattern Is a Major Determinant of Rehospitalization for Heart Failure After Transcatheter Aortic Valve Replacement.

Background Electrocardiographic strain pattern (ESP) has recently been associated with increased adverse outcome in aortic stenosis and after surgical aortic valve replacement. Our study sought to determine the impact and incremental value of ESP pattern in predicting adverse outcome after transcatheter aortic valve replacement. Methods and Results A total of 585 patients with severe aortic stenosis (mean age, 83±7 years; men, 39.8%) were enrolled for transcatheter aortic valve replacement from November 2012 to May 2018. ESP was defined as ≥1-mm concave down-sloping ST-segment depression and asymmetrical T-wave inversion in the lateral leads. The primary end points of the study were all-cause mortality, rehospitalization for heart failure, myocardial infarction, and stroke. A total of 178 (30.4%) patients were excluded because of left bundle-branch block (n=103) or right bundle-branch block (n=75). Among the 407 remaining patients, 106 had ESP (26.04%). At a median follow-up of 20.00 months (11.70-29.42 months), no impact of electric strain on overall and cardiac death could be established. By contrast, incidence of rehospitalization for heart failure was significantly higher (33/106 [31.1%] versus 33/301 [11%]; P<0.001) in patients with ESP. By multivariate analyses, ESP remained a strong predictor of rehospitalization for heart failure (hazard ratio, 2.75 [95% CI, 1.61-4.67]; P<0.001). Conclusions In patients with aortic stenosis who were eligible for transcatheter aortic valve replacement, ESP is frequent and associated with an increased risk of postinterventional heart failure regardless of preoperative left ventricular hypertrophy. ESP represents an easy, objective, reliable, and low-cost tool to identify patients who may benefit from intensified postinterventional follow-up.

Baseline mean platelet volume is a strong predictor of major and life-threatening bleedings after transcatheter aortic valve replacement.

BACKGROUND: Bleeding following transcatheter aortic valve replacement (TAVR) has important prognostic implications. This study sought to evaluate the impact of baseline mean platelet volume (MPV) on bleeding events after TAVR. METHODS AND RESULTS: Patients undergoing TAVR between February 2010 and May 2019 were included. Low MPV (L-MPV) was defined as MPV ≤10 fL and high MPV (H-MPV) as MPV >10 fL. The primary endpoint was the occurrence of major/life-threatening bleeding complications (MLBCs) at one-year follow-up. Among 1,111 patients, 398 (35.8%) had L-MPV and 713 (64.2%) had H-MPV. The rate of MLBCs at 1 year was higher in L-MPV patients compared with H-MPV patients (22.9% vs. 17.7% respectively, p = 0.034). L-MPV was associated with vascular access-site complications (36.2% vs. 28.9%, p = 0.012), early (<30 days) major bleeding (15.6% vs. 9.4%, p<0.01) and red blood cell transfusion >2 units (23.9% vs. 17.5%, p = 0.01). No impact of baseline MPV on overall death, cardiovascular death and ischemic events (myocardial infarction and stroke) was evidenced. Multivariate analysis using Fine and Gray model identified preprocedural hemoglobin (sHR 0.84, 95%CI [0.75-0.93], p = 0.001), preprocedural L-MPV (sHR 1.64, 95%CI [1.16-2.32], p = 0.005) and closure time adenosine diphosphate post-TAVR (sHR 2.71, 95%CI [1.87-3.95], p<0.001) as predictors of MLBCs. CONCLUSIONS: Preprocedural MPV was identified as an independent predictor of MLBCs one year after TAVR, regardless of the extent of platelet inhibition and primary hemostasis disorders.

Impact of Primary Hemostasis Disorders on Late Major Bleeding Events among Anticoagulated Atrial Fibrillation Patients Treated by TAVR.

BACKGROUND: Bleeding events are among the striking complications following transcatheter aortic valve replacement (TAVR), and bleeding prediction models are crucially warranted. Several studies have highlighted that primary hemostasis disorders secondary to persistent loss of high-molecular-weight (HMW) multimers of the von Willebrand factor (vWF) and assessed by adenosine diphosphate closure time (CT-ADP) may be a strong predictor of late major/life-threatening bleeding complications (MLBCs). Pre-existing atrial fibrillation (AF) is a frequent comorbidity in TAVR patients and potentially associated with increased bleeding events after the procedure. OBJECTIVES: This study evaluated the impact of ongoing primary hemostasis disorders, as assessed by post-procedural CT-ADP > 180 s, on clinical events after TAVR among anticoagulated AF patients. METHODS: An ongoing primary hemostasis disorder was defined by post-procedure CT-ADP > 180 s. Bleeding complications were assessed according to the Valve Academic Research Consortium-2 (VARC-2) criteria. The primary endpoint was the occurrence of late MLBCs at one-year follow-up. The secondary endpoint was a composite of mortality, stroke, myocardial infarction, and rehospitalization for heart failure. RESULTS: In total, 384 TAVR patients were included in the analysis. Of these patients, 57 patients (14.8%) had a prolongated CT-ADP > 180 s. Increased MLBCs were observed in patients with CT-ADP > 180 s (35.1% versus 1.2%; p < 0.0001). Conversely, the occurrence of the composite endpoint did not differ between the groups. Multivariate analysis identified CT-ADP > 180 s (HR 28.93; 95% CI 9.74-85.95; p < 0.0001), bleeding history, paradoxical aortic stenosis (AS), and major vascular complications following TAVR as independent predictors of late MLBCs. CONCLUSION: Among patients with anticoagulated AF, a post-procedural CT-ADP > 180 s was identified as a strong independent predictor of late MLBCs. These findings suggest that persistent primary hemostasis disorders contribute to a higher risk of late bleeding events and should be considered for a tailored, risk-adjusted antithrombotic therapy after TAVR.

Acute kidney injury and acute kidney recovery following Transcatheter Aortic Valve Replacement.

BACKGROUND: Acute kidney injury (AKI) is associated with a dismal prognosis in Transcatheter Aortic Valve replacement (TAVR). Acute kidney recovery (AKR), a phenomenon reverse to AKI has recently been associated with better outcomes. METHODS: Between November 2012 to May 2018, we explored consecutive patients referred to our Heart Valve Center for TAVR. AKI was defined according to the VARC-2 definition. Mirroring the VARC-2 definition of AKI, AKR was defined as a decrease in serum creatinine (≥50%) or ≥25% improvement in GFR up to 72 hours after TAVR. RESULTS: AKI and AKR were respectively observed in 8.3 and 15.7% of the 574 patients included. AKI and AKR patients were associated to more advanced kidney disease at baseline. At a median follow-up of 608 days (range 355-893), AKI and AKR patients experienced an increased cardiovascular mortality compared to unchanged renal function patients (14.6% and 17.8% respectively, vs. 8.1%, CI 95%, p<0.022). Chronic kidney disease, (HR: 3.9; 95% CI 1.7-9.2; p < 0.001) was the strongest independent factor associated with AKI similarly to baseline creatinine level (HR: 1; 95% CI 1 to 1.1 p < 0.001) for AKR. 72-hours post procedural AKR (HR: 2.26; 95% CI 1.14 to 4.88; p = 0.021) was the strongest independent predictor of CV mortality. CONCLUSIONS: Both AKR and AKI negatively impact long term clinical outcomes of patients undergoing TAVR.

Increased susceptibility to SARS-CoV-2 infection in patients with reduced left ventricular ejection fraction.

AIMS: Cardiovascular disease has been recognized as a major determinant of coronavirus disease 2019 (COVID-19) vulnerability and severity. Angiotensin-converting enzyme (ACE) 2 is a functional receptor for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and is up-regulated in patients with heart failure. We sought to examine the potential association between reduced left ventricular ejection fraction (LVEF) and the susceptibility to SARS-CoV-2 infection. METHODS AND RESULTS: Of the 1162 patients with acute coronary syndrome (ACS) who underwent percutaneous coronary intervention between February 2014 and October 2018, we enrolled 889 patients with available clinical follow-up data. Follow-up was conducted by telephone interviews 1 month after the start of the French lockdown which began on 17 March 2020. Patients were divided into two groups according to LVEF <40% (reduced LVEF) (n = 91) or ≥40% (moderately reduced + preserved LVEF) (n = 798). The incidence of COVID-19-related hospitalization or death was significantly higher in the reduced LVEF group as compared with the moderately reduced + preserved LVEF group (9% vs. 1%, P < 0.001). No association was found between discontinuation of ACE-inhibitor or angiotensin-receptor blockers and COVID-19 test positivity. By multivariate logistic regression analysis, reduced LVEF was an independent predictor of COVID-19 hospitalization or death (odds ratio: 6.91, 95% confidence interval: 2.60 to 18.35, P < 0.001). CONCLUSIONS: In a large cohort of patients with previous ACS, reduced LVEF was associated with increased susceptibility to COVID-19. Aggressive COVID-19 testing and therapeutic strategies may be considered for patient with impaired heart function.

Impact of residual inflammation on myocardial recovery and cardiovascular outcome in Takotsubo patients.

AIMS: Recent insights have emphasized the importance of myocardial and systemic inflammation in Takotsubo syndrome (TTS). In a large registry of unselected patients, we sought to evaluate whether residual high inflammatory response (RHIR) could impact cardiovascular outcome after TTS. METHODS AND RESULTS: Patients with TTS were retrospectively included between 2008 and 2018 in three general hospitals. Three hundred eighty-five patients with TTS were split into three subgroups, according to tertiles of C-reactive protein (CRP) levels at discharge (CRP <5.2 mg/L, CRP range 5.2 to 19 mg/L, and CRP >19 mg/L). The primary endpoint was the impact of RHIR, defined as CRP >19 mg/L at discharge, on cardiac death or hospitalization for heart failure. Follow up was obtained in 382 patients (99%) after a median of 747 days. RHIR patients were more likely to have a history of cancer or a physical trigger. Left ventricular ejection fraction (LVEF) at admission and at discharge were comparable between groups. By contrast, RHIR was associated with lower LVEF at follow up (61.7% vs. 60.7% vs. 57.9%; P = 0.004) and increased cardiac late mortality (0% vs. 0% vs. 10%; P = 0.001). By multivariate Cox regression analysis, RHIR was an independent predictor of cardiac death or hospitalization for heart failure (hazard ratio: 1.87; 95% confidence interval: 1.08 to 3.25; P = 0.025). CONCLUSIONS: Residual high inflammatory response was associated with impaired LVEF at follow up and was evidenced as an independent factor of cardiovascular events. All together, these findings underline RHIR patients as a high-risk subgroup, to target in future clinical trials with specific therapies to attenuate RHIR.

Paradoxical Increase of Stroke in Patients with Defect of High Molecular Weight Multimers of the von Willebrand Factors following Transcatheter Aortic Valve Replacement.

BACKGROUND: Stroke is a major cause of disability after transcatheter aortic valve replacement (TAVR) and stroke prediction models and data are crucially needed. Following TAVR, high molecular weight (HMW) multimers defect of von Willebrand factor (VWF) as assessed by closure time of adenosine diphosphate (CT-ADP) value > 180 seconds is an independent predictor of bleeding events. This study sought to identify predictors of ischemic neurological events in patients who underwent TAVR and the specific impact of HMW multimers defect of VWF. METHODS: Patients were prospectively enrolled between November 2012 and May 2018 at our institution. The CT-ADP, a point-of-care measure of hemostasis, was assessed the day before and 24 hours after the procedures. The rate of ischemic stroke and transient ischemic attack (TIA) was recorded up to 30 days after the procedures. RESULTS: Of 565 TAVR patients, ischemic stroke/TIA was observed in 21 (3.7%) patients within 30 days. Ischemic stroke/TIA was associated with major/life-threatening bleeding complications (MLBCs) (9 [43%] vs. 88 [16%], p = 0.002) and postprocedure CT-ADP > 180 seconds (10 [48%] vs. 116 [21%], p = 0.01). By multivariate analysis, MLBCs (odds ratio [OR]: 3.58; 95% confidence interval [CI]: 1.45-8.84; p = 0.006) and postprocedure CT-ADP > 180 seconds (OR: 3.38; 95% CI: 1.38-8.25; p = 0.008) were evidenced as independent predictors of ischemic stroke/TIA. CONCLUSION: MLBCs and CT-ADP > 180 seconds were identified as predictors for ischemic stroke or TIA. The present study suggests that the defects of HMW multimers of the VWFs may contribute not only to bleeding events but also to thrombotic events.

Risk and Severity of COVID-19 and ABO Blood Group in Transcatheter Aortic Valve Patients.

While cardiovascular disease has been associated with an increased risk of coronavirus disease 2019 (COVID-19), no studies have described its clinical course in patients with aortic stenosis who had undergone transcatheter aortic valve replacement (TAVR). Numerous observational studies have reported an association between the A blood group and an increased susceptibility to SARS-CoV-2 infection. Our objective was to investigate the frequency and clinical course of COVID-19 in a large sample of patients who had undergone TAVR and to determine the associations of the ABO blood group with disease occurrence and outcomes. Patients who had undergone TAVR between 2010 and 2019 were included in this study and followed-up through the recent COVID-19 outbreak. The occurrence and severity (hospitalization and/or death) of COVID-19 and their associations with the ABO blood group served as the main outcome measures. Of the 1125 patients who had undergone TAVR, 403 (36%) died before 1 January 2020, and 20 (1.8%) were lost to follow-up. The study sample therefore consisted of 702 patients. Of them, we identified 22 cases (3.1%) with COVID-19. Fourteen patients (63.6%) were hospitalized or died of disease. Multivariable analysis identified the A blood group (vs. others) as the only independent predictor of COVID-19 in patients who had undergone TAVR (odds ratio (OR) = 6.32; 95% confidence interval (CI) = 2.11-18.92; p = 0.001). The A blood group (vs. others; OR = 8.27; 95% CI = 1.83-37.43, p = 0.006) and a history of cancer (OR = 4.99; 95% CI = 1.64-15.27, p = 0.005) were significantly and independently associated with disease severity (hospitalization and/or death). We conclude that patients who have undergone TAVR frequently have a number of cardiovascular comorbidities that may work to increase the risk of COVID-19. The subgroup with the A blood group was especially prone to developing the disease and showed unfavorable outcomes.

Impact of Antithrombotic Regimen and Platelet Inhibition Extent on Leaflet Thrombosis Detected by Cardiac MDCT after Transcatheter Aortic Valve Replacement.

The impact of antithrombotic regimen and platelet inhibition extent on subclinical leaflet thrombosis (SLT) detected by cardiac multidetector computed tomography (MDCT) after transcatheter aortic valve replacement (TAVR) is not well established. Hypoattenuation affecting motion (HAM) has been proposed as a surrogate marker of SLT, and is characterized by hypoattenuated leaflet thickening (HALT) and concomitant reduction in leaflet motion (RELM). We sought to investigate (i) the prevalence of HAM and HALT after TAVR detected by MDCT, (ii) the predictors of SLT, (iii) the impact of oral anticoagulant (OAC) and platelet inhibition extent assessed by platelet reactivity index vasodilator stimulated phosphoprotein (PRI-VASP) and closure time adenosine diphosphate (CT-ADP) on SLT. Of 187 consecutive patients who underwent TAVR from 1 August 2017 to 31 March 2018, 90 of them had cardiac CT at relevant follow-up. Clinical, biological, echocardiographic, procedural characteristics and treatments were collected before, at discharge, and 1 year after TAVR. P2Y12 platelet inhibition extent and primary haemostasis disorders were investigated using platelet PRI-VASP and CT-ADP point-of-care assays. Eighty-five post-TAVR CTs out of 90 were ranked for clarity and assessed with sufficient diagnostic quality. HAM was evidenced in 13 patients (15.3%) and HALT in 30 patients (35%). Procedural characteristics, including aortic valve calcium score, annulus size, or procedural heparin regimens, were equivalent between groups. Likewise, no impact of P2Y12 inhibition (PRI-VASP) nor primary haemostasis disorders (CT-ADP) on SLT could be evidenced. No impact of SLT on valve deterioration evaluated by transthoracic echocardiography (TTE) and clinical events could be established at 12 months follow-up. By multivariate analysis, lack of oral anticoagulant therapy at discharge (HR 12.130 CI 95% (1.394-150.582); p = 0.028) and higher haemoglobin levels were evidenced as the sole independent predictors of SLT. In four patients with HAM, MDCT follow-up was obtained after initiation of OAC therapy and showed a complete regression of HAM. SLT was evidenced in a sizeable proportion of patients treated by TAVR and was mainly determined by the lack of oral anticoagulant therapy. Conversely, no impact of platelet inhibition extent on SLT could be evidenced.

Does Transcatheter Aortic Valve Replacement Modulate the Kinetic of Superoxide Anion Generation?

Reactive oxygen species (ROS) are central bioenergetic markers linked to aortic stenosis (AS) development and severity. We sought to evaluate the time course and impact of ROS assessed by plasmatic superoxide anion (SA) among patients undergoing transcatheter aortic valve replacement (TAVR). Among 106 patients, SA significantly decreased after TAVR. Dropped values were measured 10 min after TAVR (0.590 ± 0.181 vs. 0.648 ± 0.193; p < 0.001) and persistent at 3 days (0.611 ± 0.0.228 vs. 0.646 ± 0.199; p = 0.033) and 30 days follow-up (0.572 ± 0.207 vs. 0.639 ± 0.199; p = 0.005). Increased baseline SA (>75 percentile) was continuously associated with higher postprocedural SA values 10 min after valve expansion (p < 0.001), at 3 days (p < 0.001) and 30 days (p < 0.001). Higher baseline SA was linked to higher inflammatory response assessed by higher C-reactive protein values at day 1 and day 3. The composite endpoint of all-cause mortality and/or stroke and/or pacemaker implantation and/or significant paravalvular aortic regurgitation ≥mild at 30 days did not differ significantly according to SA baseline values (p = 0.055). This is the first report identifying a decrease in oxidative stress level after TAVR. Our observation leads to the hypothesis that oxidative stress biomarkers may survive the journey from bench to bedside in AS and TAVR and become new biomarkers with both diagnostic and prognostic values. Antioxid. Redox Signal. 31, 420-426.

Primary Hemostatic Disorders and Late Major Bleeding After Transcatheter Aortic Valve Replacement.

BACKGROUND: Periprocedural and late (>30 days) bleedings represent major complications after transcatheter aortic valve replacement and have been identified as potential areas for improved patient care. OBJECTIVES: The authors sought to evaluate the impact of ongoing primary hemostasis disorders on late major/life-threatening bleeding complications (MLBCs). METHODS: Bleedings were assessed according to the VARC-2 (Valve Academic Research Consortium-2) criteria. Closure time of adenosine diphosphate (CT-ADP), a surrogate marker of high molecular weight von Willebrand multimers proteolysis was assessed 24 h after the procedure. Ongoing primary hemostasis disorder was defined by a CT-ADP >180 s. RESULTS: Among 372 patients who survived at 30 days, MLBCs occurred in 42 patients (11.3%) at a median follow-up of 383 days (interquartile range: 188 to 574 days). MLBCs were mainly of gastrointestinal origin (42.8%) and were associated with increased overall mortality (hazard ratio [HR]: 5.66; 95% confidence interval [CI]: 3.10 to 10.31; p < 0.001) and cardiac mortality (HR: 11.62; 95% CI: 4.59 to 29.37; p < 0.001). A 2.5-fold elevation of MLBCs could be evidenced in patients with a CT-ADP > 180 s (27.4% vs. 11.5%; p < 0.001). Multivariate regression analysis identified paravalvular leak (PVL) (HR: 6.31; 95% CI: 3.43 to 11.60; p < 0.0001) and CT-ADP > 180 s (HR: 3.08; 95% CI: 1.62 to 5.81; p = 0.0005) as predictor of MLBCs. CONCLUSIONS: MLBCs after transcatheter aortic valve replacement are frequent and associated with an increased morbidity and mortality. PVL and CT-ADP >180 s were identified as strong predictors for MLBCs. These findings strongly suggest that persistent HMW defects contribute to enhanced bleeding risk in patients with residual PVL.