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Background: Multiple sclerosis (MS) frequently affects women of childbearing age. While short-term effects of pregnancy on MS course are well-known, whether pregnancy may influence long-term disability progression is debated. Methods: A two-centre retrospective study to investigate long-term effect of pregnancy on disability was performed in a population of MS women. Survival analyses and multivariate Cox proportional regression models (including early predictors of MS severity and exposure to disease-modifying treatments) were performed to compare time to reach well-established disability milestones in nulliparous women and in those with pregnancies after MS onset (‘parous’). Women with pregnancies before MS onset were excluded from analyses as they represent a heterogeneous group. Results: Data about 445 women (261 nulliparous, 184 ‘parous’) were analysed. A longer time to reach Expanded Disability Status Scale (EDSS) 4.0 and 6.0 was observed in parous women; Cox regression models revealed a lower risk for ‘parous’ than nulliparous women in reaching EDSS 4.0 and 6.0 (HR = 0.552, p = 0.008 and HR = 0.422, p = 0.012 respectively). Conclusion: Our findings suggest that pregnancy after MS onset is associated with a slower long-term disability progression. Whether this represents a biological/immunological effect, or reflects a higher propensity toward childbearing in women with milder disease, it remains uncertain deserving further investigations. [ABSTRACT FROM AUTHOR]

The specific tumor-induced leukocyte inhibition factor (LIF) production in laryngeal cancer patients has been investigated before and after the removal of adherent cells in order to evaluate the existence of a suppressor activity; 20 patients served as subject. The LIF production, after challenging the lymphocytes with 3MKC1 autologous tumor extracts, was significant in 12 patients and showed a further significant increase after the removal of adherent cells. In 3 patients with no previous significant LIF production, there was a conversion to significance when the adherent cells were removed. The other patients did not show any significant variation. These data seem to suggest the existence of a suppressor activity exerted by adherent cells in laryngeal cancer patients on LIF production. [ABSTRACT FROM AUTHOR]

BACKGROUND: In patients with ST-segment elevation myocardial infarction (STEMI) with multigrees, vessel coronary artery disease, the time at which complete revascularization of nonculprit lesions should be performed remains unknown. METHODS: We performed an international, open-label, randomized, noninferiority trial at 37 sites in Europe. Patients in a hemodynamically stable condition who had STEMI and multivessel coronary artery disease were randomly assigned to undergo immediate multivessel percutaneous coronary intervention (PCI; immediate group) or PCI of the culprit lesion followed by staged multivessel PCI of nonculprit lesions within 19 to 45 days after the index procedure (staged group). The primary end point was a composite of death from any cause, nonfatal myocardial infarction, stroke, unplanned ischemia-driven revascularization, or hospitalization for heart failure at 1 year after randomization. The percentages of patients with a primary or secondary end-point event are provided as Kaplan-Meier estimates at 6 months and at 1 year. RESULTS: We assigned 418 patients to undergo immediate multivessel PCI and 422 to undergo staged multivessel PCL A primary end-point event occurred in 35 patients (8.590) in the immediate group as compared with 68 patients (16.396) in the staged group (risk ratio, 0.52; 95% confidence interval, 0.38 to 0.72; P<0.001 for noninferiority and P< 0.001 for superiority). Nonfatal myocardial infarction and unplanned ischemia-driven revascularization occurred in 8 patients (2.090) and 17 patients (4.1°6), respectively, in the immediate group and in 22 patients (5.3°6) and 39 patients (9.3°6), respectively, in the staged group. The risk of death from any cause, the risk of stroke, and the risk of hospitalization for heart failure appeared to be similar in the two groups. A total of 104 patients in the immediate group and 145 patients in the staged group had a serious adverse event. CONCLUSIONS: Among patients in hemodynamically stable condition with STEMI and multivessel coronary artery disease, immediate multivessel PCI was noninferior to staged multivessel PCI with respect to the risk of death from any cause, nonfatal myocardial infarction, stroke, unplanned ischemia-driven revascularization, or hospitalization for heart failure at 1 year. [ABSTRACT FROM AUTHOR]

Background: Migraine affects up to 40% of people with multiple sclerosis (PwMS). This study aimed to evaluate the effectiveness and safety of the combination of antibodies (mAbs) against CGRP (anti-CGRP mAbs) with disease-modifying treatments (DMTs) for MS (mAb and non-mAbs) and their impact on MS disease course., Methods: This retrospective, multicentric study included PwMS from 14 MS Centers, treated with an anti-CGRP mAb and a stable treatment with DMTs. MS outcome measures included clinical relapses, EDSS score, and MRI activity from the year before starting anti-CGRP mAbs at the time of initiation (baseline) and last follow-up. Migraine outcomes included reductions in Monthly Headache Days (MHDs) and analgesic use. Adverse events (AEs) were recorded., Results: Twenty-five patients were included (mean age of 39.4 ± 9.7 years). Nine PwMS (36.0%) were treated with non-mAb DMTs and 16 (64.0%) with mAb DMTs. During the concurrent treatment, six patients (24.0%) stopped anti-CGRP mAbs after 12.7 ± 11.6 months due to ineffectiveness (n = 3) migraine sustained improvement (n = 2) and AEs (n = 1). MHDs significantly decreased from baseline (22.0 ± 8.2) to the last follow-up (11.5 ± 13.7) (p = 0.002). EDSS score did not significantly change from the year before initiating anti-CGRP mAb (1.9 ± 1.4) to baseline (1.9 ± 1.4) and last follow-up (1.9 ± 1.5)(p = 0.497). Two patients (8.0%) had a clinical relapse, and one (4.0%) had MRI activity during treatment with anti-CGRP mAbs. Overall, DMTs were discontinued in two patients (8%). Mild AEs were reported in 2 PwMS (8.0%), none leading to discontinuation., Conclusions: Long-term treatment with anti-CGRP mAbs and DMTs for MS showed safety and effectiveness with no significant effect on MS disease course., Competing Interests: Declaration of competing interest CT received travel funding and/or speaker honoraria from Alexion, Almirall, Biogen, Horizon, Merck, Novartis, Roche, Sanofi. MDF participated on advisory boards and steering committees for and received speaker or writing honoraria, research support and funding for travelling from Alexion, BMS, Bayer, Biogen Idec, Genzyme, Horizon, Janssen, Merck, Mylan, Novartis, Roche, Siemens Healthineers, Teva and Viatris. Other authors have no conflicting interests related to this manuscript. MV has received research funding and speaker/advisory board fees from Biogen, Merck, Novartis, Roche., (Copyright © 2025 Elsevier B.V. All rights reserved.)

Background: Scarce data are available on the long-term immunological effects of multiple sclerosis (MS) disease-modifying treatments (DMTs)., Objectives: This study aimed to investigate the long-term modifications of the peripheral immune repertoire on interruption of a sequestering DMT (natalizumab, fingolimod) and switch to another high-efficacy DMT., Methods: Lymphocyte subpopulations were assessed, every 6 months up to 48 months, in patients switched from fingolimod or natalizumab to ocrelizumab, and in patients switched from fingolimod to natalizumab, compared to patients switched to ocrelizumab or natalizumab from a moderate-efficacy DMT and to naive patients., Results: We included 389 MS patients (200 ocrelizumab and 189 natalizumab). After adjusting for baseline variables, patients switched from fingolimod to ocrelizumab showed lower CD3 + and CD4 + lymphocytes up to 48 months after switch (with lower percentage of naive CD4 +), and increased odds of total, CD3+, CD4+ lymphopenia. Patients switched from natalizumab to ocrelizumab showed higher CD3 + lymphocytes up to 36 months after switch, and higher CD4+, CD8+ lymphocytes up to 24 months. The frequency of infections was not influenced by previous treatment., Conclusions: A long-term persistence of the residual effects of the exposure to sequestering DMTs (fingolimod and less natalizumab) on the peripheral immune repertoire was observed after switching to another high-efficacy DMT., Competing Interests: Declaration of Conflicting InterestsThe author(s) declared the following potential conflicts of interest with respect to the research, authorship, and/or publication of this article: M.V. has received congress grants, speaker fees, and advisory board fees from Merck, Novartis, Roche, Biogen. C.B. has received speaker fees from Merck and Novartis, and congress grants from Biogen, Teva, Sanofi, Roche, Merck, Novartis, and Horizon. S.M., E.R., A.R., V.G., P.G., and G.V. report no conflicts of interest. A.C. has received research grants from Cytokinetics and advisory board fees from Amylyx and Zambon. P.C. has received congress grants, speaker fees, and advisory board fees from Alexion, Almirall, Bayer Schering, Biogen, Celgene–Bristol Myers Squibb, Merck Serono, Teva, Roche, Novartis, Sanofi Genzyme, and Janssen.

Background: The reason why some multiple sclerosis (MS) patients show disease activity after alemtuzumab (ALM) is still unclear, but ocrelizumab (OCR) could represent an interesting sequential therapeutic approach., Objectives: To investigate safety and efficacy of OCR in MS patients with disease activity after two ALM courses., Methods: Observational retrospective multi-centers Italian cohort study., Results: Seventy-two subjects were included. Mean follow-up (FU) was 2.4 (±1) years. Forty-five patients (62.5%) experienced at least one adverse event (AE), with infections accounting for 96.7% of cases. A reduction in total lymphocytes was observed between OCR start and 6 months FU, driven by BCD19+ lymphocytes depletion ( p < 0.001). Immunoglobulin M (IgM) levels decreased between OCR start and 6 months FU ( p < 0.001). At 2-year FU, relapse, magnetic resonance imaging (MRI) activity and disability worsening-free survival were 92.1%, 90.8%, and 89.2%. The evidence of inflammatory activity between the two ALM courses was associated with higher risk of relapse, MRI activity, and NEDA-3 status loss in relapsing-remitting multiple sclerosis (RRMS; p = 0.02, p = 0.05, p = 0.01, respectively)., Conclusions: OCR after two ALM courses seemed to be safe and effective. Early IgM hypogammaglobulinemia occurred in a high proportion of patients. The evidence of inflammatory activity between ALM courses seemed to increase the risk of MS re-activation on OCR treatment., Competing Interests: Declaration of Conflicting InterestsThe author(s) declared the following potential conflicts of interest with respect to the research, authorship, and/or publication of this article: C. Lapucci has received honoraria for speaking, travel grants, and for participating in the advisory board from Merck, Sanofi, Novartis, Roche, Alexion. J. Frau served on scientific advisory boards for Biogen and Genzyme, and has received honoraria as a speaker from Merck Serono, Genzyme, Biogen, and Teva. E. Cocco reported grants, personal fees, and non-financial support from Biogen and Merck; personal fees and non-financial support from Novartis; grants from Roche; and personal fees from Genzyme. G. Coghe received honoraria for consultancy or speaking from Biogen, Novartis, Sanofi, Genzyme, Serono, Teva, and Almirall. M. Petracca has received travel/meeting expenses from Novartis, Janssen, Roche, and Merck; speaking honoraria from HEALTH&LIFE S.r.l., AIM Education S.r.l., Biogen, Novartis, and FARECOMUNICAZIONE E20; honoraria for consulting services and advisory board participation from Biogen; research grants from Baroni Foundation and the Italian Ministry of University and Research. R. Lanzillo has received honoraria from Biogen, Merck, Novartis, Roche, and Teva. V. Brescia Morra has received research grants from the Italian MS Society and Roche, and honoraria from Bayer, Biogen, Merck, Mylan, Novartis, Roche, Sanofi-Genzyme, and Teva. C.G. Nicoletti received travel funding from Biogen, Merck Serono, Sanofi-Genzyme, Roche, Teva, Novartis, Bristol Mayer Squibb, Janssen, Almirall and consultation fees from Sanofi, Almirall, Merck- Serono, Roche, Novartis, and Biogen. She is a sub-investigator in clinical trials being conducted for Biogen, Merck Serono, Roche, Biogen, Sanofi, Novartis, Teva, Bristol Mayer Squibb. D. Landi has received travel funding from Biogen, Merck Serono, Sanofi, Teva, Bristol Myers Squibb, Mylan; speaking or consultations fees from Sanofi, Merck Serono, Teva, Biogen, Roche, Novartis, Bristol Myers Squibb, BayerSchering. G. Marfia has received travel funding, speaking or consultation fees from Almirall, Bayer-Schering, Biogen, Sanofi, Merck Serono, Novartis, Teva, Mylan, Bristol Mayers Squibb and research grants from Roche and Biogen. M. Vercellino has received congress grants, speaker fees and advisory board fees from Merck-Serono, Novartis, Roche, Biogen, Sanofi Genzyme. P. Cavalla has received honoraria as speaker or travel grants to attend national and international conferences or consultation for advisory boards from Alexion, Almirall, Bayer Schering, Biogen, Cellgene-BMS, Merck-Serono, Teva, Roche, Novartis, Sanof-Genzyme, and Janssen. A. Bianco has received honoraria for speaking, advisory board/consulting from Biogen, Novartis, Merck Serono, Roche, Sanofi Genzyme. M. Mirabella has received honoraria for speaking, advisory board/consulting from Biogen, Novartis, Merck Serono, Roche, Almirall, Sanofi Genzyme, Janssen, Bristol-Myers Squibb, Viatris, Alexion. He is principal investigator in clinical trials for Biogen, Merck Serono, Novartis, Roche, Sanofi Genzyme, CSL Behring, Ultragenix, Argenx. V. Torri Clerici acted as an Advisory Board member of Biogen Idec, Novartis, Merck Serono, Roche, Sanofi Genzyme, Almirall, Lundbeck and Bristol Myers Squibb; she received funding for traveling and honoraria for speaking or writing from Novartis, Sanofi Genzyme, Horizon, Merck Serono, Roche, Bristol Myers Squibb, Janssen and Almirall. She received support for research project by Almirall. E. Tomas received funding for work contract from Roche. M.T. Ferrò has received consultancy fees or speaker compensation from Sanofi, Bristol, Biogen Idec, and Novartis. L. Moiola has received honoraria for speaking and for participating in advisory board from Merck, Celgene, Biogen, Sanofi, Novartis, Roche, Alexion. M. Zaffaroni has received advisory board membership, speakers honoraria, travel support, research grants, consulting fees or clinical trial support from Actelion, Almirall, Bayer Schering, Biogen, Celgene, Excemed, Genzyme, Merck, Novartis, Sanofi, Roche, Teva. M. Ronzoni has received travel grants for congresses participation from Biogen, Genzyme, Novartis e Merck. G. Novi has received speaker honoraria from Merck, Novartis, Roche, Alexion. M. Cellerino has received consulting fees from Novartis, Genzyme, Teva and Zambon. A. Uccelli has received grants (to his institution) from FISM, Biogen, Roche, Alexion, and Merck Serono and has participated on a data safety monitoring board or advisory board (to his institution) for BD, Biogen, Iqvia, Sanofi, Roche, Alexion, and Bristol Myers Squibb. M. Inglese received grants from NIH, NMSS, and FISM; received fees for consultation from BMS, Janssen, Roche, Genzyme, Merck, Biogen and Novartis. P. Grossi, A. Nozzolillo, and F. Pinardi have nothing to disclose.

Introduction: People with multiple sclerosis (PwMS) exhibit a spectrum of needs that extend beyond solely disease-related determinants. Investigating unmet needs from the patient perspective may address daily difficulties and optimize care. Our aim was to identify patterns of unmet needs among PwMS and their determinants., Methods: We conducted a cross-sectional multicentre study. Data were collected through an anonymous, self-administered online form. To cluster PwMS according to their main unmet needs, we performed agglomerative hierarchical clustering algorithm. Principal component analysis (PCA) was applied to visualize cluster distribution. Pairwise comparisons were used to evaluate demographics and clinical distribution among clusters., Results: Out of 1764 mailed questionnaires, we received 690 responses. Access to primary care was the main contributor to the overall unmet need burden. Four patterns were identified: cluster C1, 'information-seekers with few unmet needs'; cluster C2, 'high unmet needs'; cluster C3, 'socially and assistance-dependent'; cluster C4, 'self-sufficient with few unmet needs'. PCA identified two main components in determining the patterns: the 'public sphere' (access to information and care) and the 'private sphere' (need for assistance and social life). Older age, lower education, longer disease duration and higher disability characterized clusters with more unmet needs in the private sphere. However, demographic and clinical factors failed in explaining the four identified patterns., Conclusion: Our study identified four unmet need patterns among PwMS, emphasizing the importance of personalized care. While clinical and demographic factors provide some insight, additional variables warrant further investigation to fully understand unmet needs in PwMS., (© 2024. The Author(s).)

Clinical, pathological, and imaging evidence in multiple sclerosis (MS) suggests that a smoldering inflammatory activity is present from the earliest stages of the disease and underlies the progression of disability, which proceeds relentlessly and independently of clinical and radiological relapses (PIRA). The complex system of pathological events driving "chronic" worsening is likely linked with the early accumulation of compartmentalized inflammation within the central nervous system as well as insufficient repair phenomena and mitochondrial failure. These mechanisms are partially lesion-independent and differ from those causing clinical relapses and the formation of new focal demyelinating lesions; they lead to neuroaxonal dysfunction and death, myelin loss, glia alterations, and finally, a neuronal network dysfunction outweighing central nervous system (CNS) compensatory mechanisms. This review aims to provide an overview of the state of the art of neuropathological, immunological, and imaging knowledge about the mechanisms underlying the smoldering disease activity, focusing on possible early biomarkers and their translation into clinical practice. ANN NEUROL 2024;96:1-20., (© 2024 The Authors. Annals of Neurology published by Wiley Periodicals LLC on behalf of American Neurological Association.)

Background: Kappa free light chains (κ-FLC) in the cerebrospinal fluid (CSF) are an emerging biomarker in multiple sclerosis (MS)., Objective: To investigate whether κ-FLC index has similar diagnostic value in patients with primary progressive multiple sclerosis (PPMS) compared to oligoclonal bands (OCB)., Methods: Patients with PPMS were recruited through 11 MS centres across 7 countries. κ-FLC were measured by immunonephelometry/-turbidimetry. OCB were determined by isoelectric focusing and immunofixation., Results: A total of 174 patients (mean age of 52±11 years, 51% males) were included. κ-FLC index using a cut-off of 6.1 was positive in 161 (93%) and OCB in 153 (88%) patients., Conclusion: κ-FLC index shows similar diagnostic sensitivity than OCB in PPMS., Competing Interests: HH has participated in meetings sponsored by, received speaker honoraria or travel funding from Bayer, Biogen, Celgene, Merck, Novartis, Sanofi-Genzyme, Siemens, Teva, and received honoraria for acting as consultant for Biogen, Celgene, Novartis and Teva. He is associate editor of Frontiers in Neurology. KB has participated in meetings sponsored by and received travel funding or speaker honoraria from Roche, Teva, Merck, Biogen, Sanofi. PC has received research funding and speaker fees from Merck Serono, Roche, Novartis, Biogen, Sanofi. AE has participated in meetings sponsored by Novartis. MDF participated on advisory boards for and received speaker or writing honoraria, funding for travelling and research support from Alexion, Bayer, Biogen Idec, Sanofi, Siemens Healthineers, Merck, Mylan, Novartis, Roche, Teva and Viatris. LG participated on advisory boards for, and received writing honoraria and travel grants from Almirall, Biogen, Euroimmun, Fujirebio, Merck, Mylan, Novartis, Roche, Sanofi, Siemens Healthineers, and Teva. DM has participated in meetings sponsored by Siemens. VVP has received travel grants from Merck, Biogen, Sanofi and Roche. His institution has received research grants and consultancy fees from Roche, Biogen, Sanofi, Merck, Bristol Meyer Squibb, Janssen, Almirall and Novartis Pharma. TP has received research grant support and travel support from Biogen Idec, Merck Serono, Novartis, Bayer Schering, Sanofi-Aventis, Roche, and Genzyme. SP had received travel funding and speaker honoraria from Bayer, Biogen, Merck, Novartis, Sanofi-Genzyme, Teva, The Binding Site. IR has received compensation for lectures from Biogen. UR has participated in meetings sponsored by or received honoraria for advisor/speaker for Bayer, Biogen, Janssen, Lek, Merck, Novartis, Roche, Sanofi-Genzyme, Teva. His institution has received research support from Biogen and Novartis. CS has participated in meetings sponsored by Siemens. CT has a collaboration contract with ADx Neurosciences, Quanterix and Eli Lilly, performed contract research or received grants from AC-Immune, Axon Neurosciences, Bioconnect, Biogen, Bioorchstra, Brainstorm Therapeutics, Celgene, EIP Pharma, Eisai, Novo Nordisk, PeopleBio, Roche, Toyama, Vivoryon. She serves on editorial boards of Medidact Neurologie/Springer, Alzheimer Research and Therapy, Neurology: Neuroimmunology & Neuroinflammation, and is editor of a Neuromethods book Springer. Research of CET is supported by the European Commission Marie Curie International Training Network, grant agreement No 860197 MIRIADE, Innovative Medicines Initiatives 3TR Horizon 2020, grant no 831434and JPND bPRIDE, National MS Society Progressive MS alliance and Health Holland, the Dutch Research Council ZonMW, Alzheimer Drug Discovery Foundation, The Selfridges Group Foundation, Alzheimer Netherlands, Alzheimer Association. CT is recipient of ABOARD, which is a public-private partnership receiving funding from ZonMW #73305095007 and Health~Holland, Topsector Life Sciences & Health PPP-allowance; #LSHM20106. ABOARD also receives funding from Edwin Bouw Fonds and Gieskes-Strijbisfonds. DV received travel grants from Merck, Sanofi-Genzyme, Almirall and Novartis and research grants from Merck. MV has received research funding and speaker fees from Merck Serono, Roche, Novartis, Biogen, Sanofi. FD has participated in meetings sponsored by or received honoraria for acting as an advisor/speaker for Alexion, Almirall, Biogen, Celgene-BMS, Genzyme-Sanofi, Horizon, Merck, Novartis Pharma, Roche, and Teva. His institution has received research grants from Biogen and Genzyme Sanofi. He is section editor of the MSARD Journal Multiple Sclerosis and Related Disorders and review editor of Frontiers Neurology. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Hegen, Berek, Cavalla, Christiansen, Emeršič, Di Filippo, Gaetani, Hassler, Leurs, Milosavljevic, van Pesch, Petersen, Presslauer, Rosenstein, Rot, Schnabl, Teunissen, Vecchio, Vercellino and Deisenhammer.)

Background: Leptomeningeal enhancement (LME) has been described as a biomarker of meningeal inflammation in multiple sclerosis (MS)., Objective: The aim of this study was to (1) assess if LME is predictive of disability worsening in progressive MS (pMS) patients and (2) investigate the pathological substrates of LME in an independent post-mortem MS series., Methods: In total, 115 pMS patients were imaged yearly with 1.5T MRI, using post-contrast CUBE 3D FLAIR for LME detection. Endpoint: to identify the baseline variables predictive of confirmed disability worsening (CDW) at 24 months follow-up. Post-mortem, inflammation, and structural changes of the leptomeninges were assessed in 12 MS/8 control brains., Results: LME (27% of patients at baseline) was associated with higher EDSS and lower brain volume (nBV). LME was unchanged in most patients over follow-up. LME at baseline MRI was independently associated with higher risk of 24 months CDW (HR 3.05, 95% CI 1.36-6.84, p  = 0.007) in a Cox regression, including age, nBV, T2 lesion volume, high-efficacy treatments, and MRI disease activity. Post-mortem, focal structural changes (fibrosis) of the leptomeninges were observed in MS, usually associated with inflammation (Kendall's Tau 0.315, p  < 0.0001)., Conclusions: LME is frequently detected in pMS patients using 1.5T MRI and is independently predictive of disability progression. LME could result from both focal leptomeningeal post-inflammatory fibrosis and inflammation., Competing Interests: Declaration of Conflicting InterestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Background: Covid-19 pandemic impacted on management of people with Multiple Sclerosis (pwMS). Level of satisfaction of pwMS regarding the care received by the staff of Multiple Sclerosis Centers (MSCs) during the pandemic was not fully investigated. In a large patient-centered multicenter study, the therapeutic adherence and quality of care of MSCs was assessed., Methods: In April-May 2021, an online survey was widespread by 16 Italian MSCs. Frequencies, percentages and/or means and standard deviations were calculated to describe the sample. ANOVAs were performed to evaluate the effect of sociodemographic and clinical variables on overall pwMS' rating of MSC assistance., Results: 1670 pwMS completed the survey (67.3% women). During the pandemic, 88% did not change their disease modifying therapy schedule, and 89.1% reached their MSCs with no or little difficulties. Even if only 1.3% of participants underwent a tele-health follow-up visit with their MSC staff, the 80.1% believed that tele-health services should be improved regardless of pandemic. 92% of participants were satisfied of how their MSC took charge of their needs; ANOVAs revealed an effect of disease duration on pwMS' level of satisfaction on MSCs management during the pandemic., Conclusions: The results revealed an efficient MSCs response to Covid-19 pandemic and provided the basis for the implementing of tele-health services that would further improve the taking charge of patients, particularly those with longer disease, higher disability, and/or living far from their MSC., Competing Interests: Declaration of Competing Interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Antonio Gallo reports a relationship with Biogen that includes: consulting or advisory, speaking and lecture fees, and travel reimbursement. Antonio Gallo reports a relationship with Merck Serono that includes: consulting or advisory, speaking and lecture fees, and travel reimbursement. Antonio Gallo reports a relationship with Mylan ITALIA Srl that includes: consulting or advisory, speaking and lecture fees, and travel reimbursement. Antonio Gallo reports a relationship with Novartis that includes: consulting or advisory, speaking and lecture fees, and travel reimbursement. Antonio Gallo reports a relationship with Roche that includes: consulting or advisory, speaking and lecture fees, and travel reimbursement. Antonio Gallo reports a relationship with Sanofi Genzyme that includes: consulting or advisory, speaking and lecture fees, and travel reimbursement. Antonio Gallo reports a relationship with Teva Health that includes: consulting or advisory, speaking and lecture fees, and travel reimbursement. Lorena Lorefice reports a relationship with Biogen that includes: consulting or advisory and speaking and lecture fees. Lorena Lorefice reports a relationship with Novartis that includes: consulting or advisory and speaking and lecture fees. Lorena Lorefice reports a relationship with Sanofi that includes: consulting or advisory and speaking and lecture fees. Lorena Lorefice reports a relationship with Sanofi Genzyme that includes: consulting or advisory and speaking and lecture fees. Lorena Lorefice reports a relationship with Merck Serono that includes: consulting or advisory and speaking and lecture fees. Lorena Lorefice reports a relationship with Teva Health that includes: consulting or advisory and speaking and lecture fees. Lorena Lorefice reports a relationship with Almirall Ltd that includes: speaking and lecture fees. Alvino Bisecco reports a relationship with Biogen that includes: consulting or advisory and speaking and lecture fees. Alvino Bisecco reports a relationship with Roche that includes: consulting or advisory and speaking and lecture fees. Alvino Bisecco reports a relationship with Merck & Co Inc that includes: consulting or advisory and speaking and lecture fees. Alvino Bisecco reports a relationship with Celgene Corp Los Angeles that includes: consulting or advisory and speaking and lecture fees. Alvino Bisecco reports a relationship with Sanofi Genzyme that includes: consulting or advisory and speaking and lecture fees. Massimiliano Calabrese reports a relationship with Biogen that includes: speaking and lecture fees. Massimiliano Calabrese reports a relationship with Bristol Myers Squibb that includes: speaking and lecture fees. Massimiliano Calabrese reports a relationship with Celgene Corp Los Angeles that includes: speaking and lecture fees. Massimiliano Calabrese reports a relationship with Sanofi Genzyme that includes: speaking and lecture fees. Massimiliano Calabrese reports a relationship with Merck Serono that includes: speaking and lecture fees. Massimiliano Calabrese reports a relationship with Novartis that includes: speaking and lecture fees. Massimiliano Calabrese reports a relationship with Roche that includes: speaking and lecture fees. Massimiliano Calabrese reports a relationship with International Progressive MS Alliance that includes: funding grants. Massimiliano Calabrese reports a relationship with Ministry of Health that includes: funding grants. Massimiliano Di Filippo reports a relationship with Bayer AG that includes: speaking and lecture fees and travel reimbursement. Massimiliano Di Filippo reports a relationship with Biogen Italy that includes: speaking and lecture fees and travel reimbursement. Massimiliano Di Filippo reports a relationship with Sanofi Genzyme that includes: speaking and lecture fees and travel reimbursement. Massimiliano Di Filippo reports a relationship with Merck & Co Inc that includes: speaking and lecture fees and travel reimbursement. Massimiliano Di Filippo reports a relationship with Mylan ITALIA Srl that includes: speaking and lecture fees and travel reimbursement. Massimiliano Di Filippo reports a relationship with Novartis that includes: speaking and lecture fees and travel reimbursement. Massimiliano Di Filippo reports a relationship with Roche that includes: speaking and lecture fees and travel reimbursement. Massimiliano Di Filippo reports a relationship with Siemens Healthineers that includes: speaking and lecture fees and travel reimbursement. Massimiliano Di Filippo reports a relationship with Teva Health that includes: speaking and lecture fees and travel reimbursement. Gioacchino Tedeschi reports a relationship with Teva Health that includes: board membership. Gioacchino Tedeschi reports a relationship with Roche that includes: board membership. Gioacchino Tedeschi reports a relationship with Eli Lilly Italy that includes: board membership. Gioacchino Tedeschi reports a relationship with Allergan US that includes: board membership. Gioacchino Tedeschi reports a relationship with Sanofi-Aventis US LLC that includes: speaking and lecture fees and travel reimbursement. Gioacchino Tedeschi reports a relationship with Merck Serono Ltd that includes: speaking and lecture fees and travel reimbursement. Gioacchino Tedeschi reports a relationship with Bayer Schering Pharma AG that includes: speaking and lecture fees and travel reimbursement. Gioacchino Tedeschi reports a relationship with Biogen Italy that includes: speaking and lecture fees and travel reimbursement. Gioacchino Tedeschi reports a relationship with Novartis that includes: speaking and lecture fees and travel reimbursement., (Copyright © 2023 The Author(s). Published by Elsevier B.V. All rights reserved.)

Transcatheter aortic valve replacement (TAVR) is an established therapy for severe, symptomatic aortic valve stenosis even in patients with impaired left ventricular systolic function. However, there is uncertainty on the clinical effectiveness of the currently available TAVR devices in patients with reduced left ventricular ejection fraction (LVEF). The LOSTAVI (Low Systolic function and Transcatheter Aortic Valve Implantation) registry is a retrospective observational study using baseline, procedural, discharge, and long-term follow-up details. A total of 3 groups of interest were distinguished: extremely reduced LVEF (<25%), severely reduced LVEF (25% to 30%), and reduced LVEF (31% to 35%). Unadjusted and adjusted analyses were carried out for in-hospital and follow-up outcomes. A total of 923 patients were included from 12 centers, with 146 patients (16%) with LVEF <25%, 425 (46%) with LVEF 25% to 30%, and 352 (38%) with LVEF 31% to 35%. Several baseline and procedural features were different across groups, including age, risk, functional class, and prevalence of bicuspid disease (all p <0.05). In-hospital mortality was similar in the 3 groups (7 [4.8%], 18 [4.2%], and 7 [2.0%], respectively, p = 0.661), but major adverse events were more common in those with extremely reduced and severely reduced LVEF (19 [13%], 53 [13%], and 25 [7.1%], respectively, p = 0.024). The 12-month follow-up confirmed the significant detrimental impact of reduced LVEF on both death (21 [14%], 49 [12%], and 25 [7.1%], respectively, p = 0.024) and major adverse events (37 [25%], 89 [21%], and 53 [15%], respectively, p = 0.016). The adjusted analysis confirmed the significant prognostic role of LVEF on both outcomes, whereas TAVR device type was not associated with death or major adverse events (all p >0.05). In conclusion, TAVR yields favorable early and 1-year results in patients with reduced LVEF, including those with extremely depressed systolic dysfunction. However, reduced LVEF still represents a major adverse prognostic factor for both short- and mid-term outcomes., Competing Interests: Declaration of Competing Interest Dr. Biondi-Zoccai has consulted for Amarin, Balmed, Cardionovum, Crannmedical, Endocore Lab, Eukon, Innovheart, Guidotti, Meditrial, MicroPort, Opsens Medical, Terumo, and Translumina. Lars Sondergaard has received consultant fees and/or institutional research grants from Abbott, Boston Scientific, Medtronic, and SMT. Dr. Schaefer has received speaker honoraria from Abbott. The remaining authors have no conflicts of interest to declare., (Copyright © 2023 Elsevier Inc. All rights reserved.)

Objective: Acute kidney injury (AKI) may complicate transcatheter aortic valve replacement (TAVR) and could be linked to atheroembolization associated with catheter manipulation in the supra-renal (SR) aorta. We sought to determine the impact of SR aortic atheroma burden (SR-AAB) and composition, as well as of the aortic valve calcium score (AV-CS), measured at pre-operative multislice computed tomography (PO-MSCT), on AKI-TAVR., Methods: All TAVR-patients 3 January-2018 to December-2020 were included. A three-dimensional analysis of PO-MSCT was performed, calculating percentage SR-AAB (%SR-AAB) as [(absolute SR-AAB volume)*100/vessel volume]. Types of plaque were defined according to Hounsfield unit (HU) intensity ranges. Calcified plaque was subcategorized into 3 strata: low- (351-700 HU), mid- (701-1000 HU), and high‑calcium (>1000 HU, termed 1 K-plaque)., Results: The study population included 222 patients [mean age 83.3 ± 5.7 years, 95 (42.8%) males], AKI-TAVR occurred in 67/222 (30.2%). Absolute SR-AAB (41.3 ± 16.4 cm 3 vs. 32.5 ± 10.7 cm 3 ,p < 0.001) and %SR-AAB (17.6 ± 5.1% vs. 13.9 ± 4.3%,p < 0.001) were significantly higher in patients developing AKI-TAVR. Patients who developed AKI-TAVR had higher mid‑calcium (6.9 ± 3.8% vs. 4.2 ± 3.5%,p < 0.001) and 1 K-plaque (5.4 ± 3.7% vs. 2.4 ± 2.4%,p < 0.001) with no difference in AV-CS (p = 0.691). Adjusted multivariable logistic regression analysis showed that %SR-AAB [OR (x%increase): 1.12, 95%CI: 1.04-1.22,p = 0.006] and %SR-calcified plaque [OR (x%increase): 5.60, 95%CI: 2.50-13.36,p < 0.001] were associated with AKI-TAVR. Finally, 3-knots spline analyses identified %SR-AAB >15.0% and %SR-calcified plaque >7.0% as optimal thresholds to predict an increased risk of AKI-TAVR., Conclusions: Suprarenal aortic atheroma, when highly calcified, is associated with AKI-TAVR. Perioperative-MSCT assessment of aortic atherosclerosis may help in identification of patients at high-risk for AKI-TAVR, who could benefit from higher peri-operative surveillance., Competing Interests: Declaration of Competing Interest None of the authors have COI to declare for this work., (Copyright © 2023 Elsevier B.V. All rights reserved.)

Introduction: An association between intercurrent viral respiratory infections and exacerbations of Multiple Sclerosis (MS) disease activity has been proposed by several studies. Considering the rapid spread of SARS-CoV2 worldwide and the systematic effort to immediately detect all incident cases with specific diagnostic tests, the pandemic can represent an interesting experimental model to assess the relationship between viral respiratory infections and MS disease activity., Aims and Methods: In this study, we have performed a propensity score matched case-control study with a prospective clinical/MRI follow-up, on a cohort of relapsing-remitting MS (RRMS) patients who tested positive for SARS-CoV2 in the period 2020-2022, with the aim to evaluate if the SARS-CoV2 infection influences the short-term risk of disease activity. Controls (RRMS patients not exposed to SARS-CoV-2, using 2019 as the reference period) were matched 1:1 with cases for age, EDSS, sex and disease-modifying treatment (DMT) (moderate efficacy vs high efficacy). Differences in relapses, MRI disease activity and confirmed disabilty worsening (CDW) between cases in the 6 months following the SARS-CoV-2 infection, and controls in a similar 6 months reference period in 2019 were compared., Results: We identified 150 cases of SARS-CoV2 infection in the period March 2020 - March 2022, out of a total population of approximately 1500 MS patients, matched with 150 MS patients not exposed to SARS-CoV2 (controls). Mean age was 40.9 ± 12.0 years in cases and 42.0 ± 10.9 years in controls, mean EDSS was 2.54±1.36 in cases and 2.60±1.32 in controls. All patients were treated with a DMT, and a considerable proportion with a high efficacy DMT (65.3% in cases and 66% in controls), reflecting a typical real world RRMS population. 52.8% of patients in this cohort had been vaccinated with a mRNA Covid-19 vaccine. We did not observe a significant difference in relapses (4.0% cases, 5.3% controls; p = 0.774), MRI disease activity (9.3% cases, 8.0% controls; p = 0.838), CDW (5.3% cases, 6.7% controls; p = 0.782) in the 6 months after SARS-CoV-2 infection between cases and controls., Conclusion: Using a propensity score matching design and including both clinical and MRI data, this study does not suggest an increased risk of MS disease activity following SARS-CoV-2 infection. All MS patients in this cohort were treated with a DMT, and a considerable number with a high efficacy DMT. These results therefore may not be applicable to untreated patients, for which the risk of increased MS disease activity after SARS-CoV-2 infection may not be excluded. A possible hypothesis explaining these results could be that SARS-CoV2 is less prone, compared to other viruses, to induce exacerbations of MS disease activity; another possible interpretation of these data might be that DMT is able to effectively suppress the increase of disease activity triggered by SARS-CoV2 infection., Competing Interests: Declaration of Competing Interest Marco Vercellino and Paola Cavalla have received research funding and speaker fees from Merck Serono, Roche, Novartis, Biogen, Sanofi. The other Authors declare that there is no conflict of interest regarding this study., (Copyright © 2023 Elsevier B.V. All rights reserved.)

Background: Recently, concern has been raised about the influence of the previous disease-modifying treatments (DMTs) on the clinical efficacy of ocrelizumab (OCR). We aimed to evaluate whether the previous DMT affects the lymphocyte subset kinetics in people with Multiple Sclerosis (MS) switching to OCR., Methods: This is a multicenter, retrospective, real-world study on consecutive MS patients who started or switched to OCR. We grouped them by prior DMT in: (i) naïve-to-treatment (NTT), (ii) switching from fingolimod (SF) and (iii) switching from natalizumab (SN). Differences in absolute lymphocyte count and lymphocyte subset count changes, considering the period from baseline to 6 months, over all the three groups were assessed with an inverse-probability-weighted regression adjustment model., Results: Mean T CD4+ cell count reduction from baseline to the six-month follow-up was more pronounced in the SN group compared to the NTT (p = 0,026). Further, patients in the SF group experienced a less pronounced CD4 T cell number decrease than both NTT and SN groups (p = 0,04 and p < 0,001, respectively). Patients in the SF group experienced an increase in CD8 T cell absolute number, whereas those in the NTT and SN groups experienced a significant decrease (p = 0,015 and p < 0,001, respectively). Patients experiencing early inflammatory activity showed a lower CD8+ cell count at baseline than stable patients (p = 0,02)., Conclusions: Previous DMTs influence the lymphocyte kinetics in people with MS switching to OCR. Reassessment of these findings over a larger population may help optimize the switch., (Copyright © 2023 Elsevier B.V. All rights reserved.)

Background: The optimal access route in patients with severe peripheral artery disease (PAD) undergoing transcatheter aortic valve replacement (TAVR) remains undetermined., Objectives: This study sought to compare clinical outcomes with transfemoral access (TFA), transthoracic access (TTA), and nonthoracic transalternative access (TAA) in TAVR patients with severe PAD., Methods: Patients with PAD and hostile femoral access (TFA impossible, or possible only after percutaneous treatment) undergoing TAVR at 28 international centers were included in this registry. The primary endpoint was the propensity-adjusted risk of 30-day major adverse events (MAE) defined as the composite of all-cause mortality, stroke/transient ischemic attack (TIA), or main access site-related Valve Academic Research Consortium 3 major vascular complications. Outcomes were also stratified according to the severity of PAD using a novel risk score (Hostile score)., Results: Among the 1,707 patients included in the registry, 518 (30.3%) underwent TAVR with TFA after percutaneous treatment, 642 (37.6%) with TTA, and 547 (32.0%) with TAA (mostly transaxillary). Compared with TTA, both TFA (adjusted HR: 0.58; 95% CI: 0.45-0.75) and TAA (adjusted HR: 0.60; 95% CI: 0.47-0.78) were associated with lower 30-day rates of MAE, driven by fewer access site-related complications. Composite risks at 1 year were also lower with TFA and TAA compared with TTA. TFA compared with TAA was associated with lower 1-year risk of stroke/TIA (adjusted HR: 0.49; 95% CI: 0.24-0.98), a finding confined to patients with low Hostile scores (P interaction  = 0.049)., Conclusions: Among patients with PAD undergoing TAVR, both TFA and TAA were associated with lower 30-day and 1-year rates of MAE compared with TTA, but 1-year stroke/TIA rates were higher with TAA compared with TFA., Competing Interests: Funding Support and Author Disclosures Dr Palmerini has received speaker fees from Edwards Lifesciences and Medtronic. Dr Saia has received consulting and lecture fees from Abbott, Edwards Lifesciences, and Medtronic. Dr Kim has received personal fees from Abbott, Boston Scientific, Edwards Lifesciences, Medtronic, Merill Life Sciences, and Shockwave Medical. Dr Søndergaard has received consulting fees and/or institutional research grants from Abbott, Boston Scientific, Medtronic, and Sahajanand Medical Technologies. Dr Burzotta has received speaker fees from Abiomed, Abbott, Medtronic, and Terumo. Dr Romagnoli has received speaker fees by Abbott Vascular, Abiomed, and Medtronic. Dr Van Mieghem has received research grant support from Abbott Vascular, Biotronik, Boston Scientific, Medtronic, Edwards Lifesciences, Abiomed, PulseCath BV, and Daiichi Sankyo. Dr Pilgrim has received research grants to his institution from Boston Scientific, Biotronik, and Edwards Lifesciences; and honoraria from Biotronik, Boston Scientific, Medtronic, Abbott, and HighLife SAS. Dr Adam has received personal and proctoring fees from Abbott, Boston Scientific, Edwards Lifesciences, JenaValve, and Medtronic (during the conduct of the study). Dr Di Mario has received research grants to his institution from Abbott, Amgen, Boston Scientific, Chiesi, Daiichi Sankyo, Edwards Lifesciences, and Volcano Philips. Dr Toggweiler has served as a proctor/consultant for Medtronic, Edwards Lifesciences, Biosensors, Boston Scientific, and Abbott Vascular; has served consultant for Medira, AtHeart Medical, Veosource, Shockwave, Teleflex, and Polares Medical; has received institutional research grants from Biosensors, Boston Scientific, and Fumedica; and holds equity in Hi-D Imaging. Dr Testa has received consulting fees from and served as a proctor Abbott, Boston Scientific, Medtronic, and Merrill. Dr Berti has served as a proctor for Edwards Lifesciences, Abbott, and Boston Scientific. Dr Ancona has received consultant fees from Abbott. Dr Montorfano has received proctor fees from Abbott, Edwards Lifesciences, and Boston Scientific. Dr Castriota has received proctoring fees from Abbott and Medtronic. Dr Petronio has received consultant and research funds from Medtronic, Boston Scientific, and Abbott. Dr Barbanti has served as a consultant for Medtronic, Edwards Lifesciences, and Boston Scientific. Dr Tamburino has received speaker honoraria from Abbott and Medtronic. Dr Nickenig has received lecture or advisory board honoraria from Abbott, Amarin, AstraZeneca, Bayer, Berlin Chemie, Biosensus, Biotronik, Bristol Myers Squibb, Boehringer Ingelheim, CardioValve, Daiichi Sankyo, Edwards Lifesciences, Medtronic, Novartis, Pfizer, and Sanofi; owns stock options with Beren, Cardiovalve; has served in clinical trials with Abbott, AstraZeneca, Bayer, Berlin Chemie, Biosensus, Biotronik, Bristol Myers Squibb, Boehringer Ingelheim, CardioValve, Daiichi Sankyo, Edwards Lifesciences, Medtronic, Novartis, Pfizer, and Sanofi; and has received research funding from the Deutsche Forschungsgemeinschaft, the Bundeministerium für Bildung und Forschun, the European Union, Abbott, Bayer, Bristol Myers Squibb, Boehringer Ingelheim, Edwards Lifesciences, Medtronic, Novartis, and Pfizer. Dr Stefanini has received speaker fees from Abbott Vascular, Boston Scientific, and Pfizer/Bristol Myers Squibb; research grants to his institution from Boston Scientific. Dr Latib has served as a consultant for Abbott, Medtronic, Edwards Lifesciences, Boston Scientific, Neovasc, Shifamed, and Philips. Dr Porto has received consulting or speaker fees from Biotronik, Abiomed, Medtronic, Terumo, Philips, Sanofi, Amgen, Daiichi Sankyo, AstraZeneca, and Bayer, not related to this work. Dr Grube has served on the Speakers Bureau/Scientific Advisory Board for Medtronic, Boston Scientific, JenaValve, and High Life; and owns equity interest in Millipede, Pi-Cardia, Ancora, Laminar, ReNiva Medical, and Shockwave. Dr Stone has received speaker honoraria from Medtronic, Pulnovo, and Infraredx; has served as a consultant for Valfix, TherOx, Robocath, HeartFlow, Ablative Solutions, Vectorious, Miracor, Neovasc, Abiomed, Ancora, Elucid Bio, Occlutech, CorFlow, Apollo Therapeutics, Impulse Dynamics, Cardiomech, Gore, Amgen, and Adona Medical; owns equity/options in Ancora, Cagent, Applied Therapeutics, the Biostar family of funds, SpectraWave, Orchestra Biomed, Aria, Cardiac Success, Valfix, and Xenter; has a daughter who is an employee at Medtronic; and his employer (Mount Sinai Hospital) has received research support from Abbott, Abiomed, Bioventrix, Cardiovascular Systems, Philips, Biosense Webster, Shockwave, Vascular Dynamics, and V-wave. All other authors have reported that they have no relationships relevant to the contents of this paper to disclose., (Copyright © 2023 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.)

Background: Several observational studies have shown an association between low circulating levels of 25-hydroxy- vitamin D (25(OH)D) and an increase in inflammatory activity in Multiple Sclerosis (MS). Among its immunomodulatory functions, 25(OH)D suppresses proliferation and immunoglobulin production of B cells. 25(OH)D supplementation has been associated with better radiological outcomes in MS patients treated with interferon (IFN)-B, glatiramer acetate, fingolimod, natalizumab and rituximab. Our study is aimed at analyzing the association of 25(OH)D serum levels and supplementation with B cell kinetics and clinical-radiological outcomes of people with MS treated with ocrelizumab., Methods: We have retrospectively collected clinical and radiological data from 136 MS patients who have been treated with ocrelizumab, have undergone at least two treatment cycles and for whom data on serum 25(OH)D levels and intake were available. The patients were divided into three groups according to baseline 25(OH)D serum levels: deficient (≤19,9 ng/ml), insufficient (20-29,9 ng/ml), and normal range 25(OH)D (>30 ng/ml). According to 25(OH)D intake, we divided our population into users and non-users. To explore B cell kinetics at six- and twelve-month follow-ups, the patients were divided into two groups: with fast repopulation (FR) and slow repopulation rate (SR), based on the reappearance or non- appearance of CD19 at each time point., Results: When considering the entire population, the mean 25(OH)D serum level (sd) was 26.27 ng/ml (14.15). 43 (31,62%) patients were classified as deficient, 52 (38,24%) were classified as insufficient, and 41 (30,14%) showed 25(OH)D serum levels within the normal range. 60.29% (82/136) of the patients were classified as users, and 39.70% (54/136) as non-users. Over the eighteen-month treatment period, we observed a significant difference between the 25(OH)D users and the non-users as concerns the number of scans with at least one new/enlarging T2 lesion (2% vs 15.38%, respectively; p= 0.025). In the multinomial regression model, 25(OH)D deficiency (serum levels ≤19,9 ng/ml) was significantly associated with a higher likelihood of disease activity during a follow-up of eighteen months (p = 0.029, RRR = 4.84, Confidence Interval (CI) 1.17 - 20.01). After six months, there were 30/136 FR patients (22,05%), whereas only 22/136 (16,17%) showed early B cell reappearance at twelve month follow up. 86.66% of the patients in the FR group showed 25(OH)D levels lower than 30 ng/ml (25(OH)D deficiency or insufficiency), whereas only 65.09% of the SR patients presented vitamin D levels lower than 30 ng/ml (p= 0.024). In the logistic regression model, 25(OH)D serum levels below 30 ng/ml were associated with a higher likelihood of early B cell reappearance at six month follow up (p= 0.042)., Conclusions: 25(OH)D supplementation and serum levels might be associated with B cell kinetics and radiological activity of patients with MS treated with ocrelizumab., (Copyright © 2022. Published by Elsevier B.V.)

Background Acute kidney injury (AKI) after transcatheter aortic valve replacement (TAVR) is associated with increased mortality. However, it is controversial whether AKI affects prognosis per se, being linked to baseline chronic kidney disease (CKD) and bleeding complications. The aim of this study was to disentangle, applying mediation analysis, the association between AKI and clinical outcome, considering CKD and bleedings. Methods and Results Consecutive patients undergoing TAVR were prospectively enrolled at 5 high-volume centers in Italy. AKI was defined according to Valve Academic Research Consortium-3 consensus, whereas bleeding with Bleeding Academic Research Consortium. Primary outcome was all-cause mortality after 1-year follow-up. Among 2621 patients undergoing TAVR, AKI occurrence was associated with 1-year mortality. This association of AKI with the primary end points remained significant after adjusting for baseline risk estimators, either Society of Thoracic Surgeons score (hazard ratio [HR], 2.78 [95% CI, 1.95-3.80], P <0.001) or EuroSCORE-II (HR, 1.85 [95% CI, 1.35-2.56], P <0.001). Both AKI and CKD significantly and independently affected primary outcome (HR, 3.06 [95% CI, 2.01-4.64], P <0.001 and HR, 1.82 [95% CI 1.27-2.65], P <0.01, respectively). The estimated proportion of the total effect of CKD mediated via AKI was, on average, 15%, 95% CI, 4%-29%, P <0.001. The significant effect of Bleeding Academic Research Consortium 2-5 bleedings on the primary outcome was not mediated by AKI. Conclusions AKI occurs in 1 out of 6 patients and significantly mediates one fifth of the effect of baseline CKD on all-cause mortality after TAVR. Our analysis supports a systematic effort to prevent AKI during TAVR, which may potentially translate into improved patients' 1-year survival.