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International Headache Society global practice recommendations for the acute pharmacological treatment of migraine
Puledda, Francesca , Diener, Hans‐Christoph , Al‐Khazali, Haidar M. , Ashina, Sait , Liebler, Eric , Chu, Min Kyung , Cocores, Alexandra, Dodd-Glover, Freda , Ekizoğlu, Esme , Göbel, Carl, Hassan, Amr , Hirata, Koichi , Hoffmann, Jan , Jenkins, Bronwyn , Kamm, Katharina , Martinelli, Daniele , Monteith, Teshamae , Romanenko, V.I. , Vandenbussche, Nicolas , Tassorelli, Cristina , Diener, Hans-Christoph , Ashina, Sait , Chu, Min Kyung , Garcia-Azorin, David , Hoffmann, Jan , Kamm, Katharina , Lee, Mi Ji , Ling, Yu-Hsiang , Martinelli, Daniele , Monteith, Teshamae S , Ornello, Raffaele , Rozen, Todd D. , Pozo-Rosich, Patricia , Souza, Marcio Nattan P , Thuraiaiyah, Janu , Togha, Mansoureh , Wang, Shuu-Jiun , Yu, Shengyuan , Tassorelli, Cristina , Al-Khazali, Haidar M , Puledda, Francesca , Hassan, Amr , Sacco, Simona , Ashina, Messoud , Burstein, Rami , Cipriani, Andrea , Göbel, Carl Hartmut , Goicochea, María Teresa , Lee, Mi Ji , Lisicki, Marco , Ornello, Raffaele , Özge, Aynur , Peres, Mário Fernando Prieto , Pozo‐Rosich, Patricia , Schwedt, Todd J. , Takizawa, Tsubasa , Terwindt, Gisela M. , Wang, Shuu‐Jiun

Cephalalgia | August 12, 2024 | Volume: 44 | Issue: 8 | Pages: No page available

10.1177/03331024241252666 | PMID 39133176 Get It

Background In an effort to improve migraine management around the world, the International Headache Society (IHS) has here developed a list of practical recommendations for the acute pharmacological treatment of migraine. The recommendations are categorized into optimal and essential, in order to provide treatment options for all possible settings, including those with limited access to migraine medications. Methods An IHS steering committee developed a list of clinical questions based on practical issues in the management of migraine. A selected group of international senior and junior headache experts developed the recommendations, following expert consensus and the review of available national and international headache guidelines and guidance documents. Following the initial search, a bibliography of twenty-one national and international guidelines was created and reviewed by the working group. Results A total of seventeen questions addressing different aspects of acute migraine treatment have been outlined. For each of them we provide an optimal recommendation, to be used whenever possible, and an essential recommendation to be used when the optimal level cannot be attained. Conclusion Adoption of these international recommendations will improve the quality of acute migraine treatment around the world, even where pharmacological options remain limited.
Dopamine Pathway and Parkinson's Risk Variants Are Associated with Levodopa‐Induced Dyskinesia
Sosero, Yuri L. , Bandrés‐Ciga, Sara , Tocino, Maria Teresa Periñan, Belloso, Dìaz R., Gómez‐Garre, Pilar , Faouzi, Johann , Pavelka, Lukas , Marques, Tainá M. , May, Patrick , Milanowski, Łukasz , Uitti, Ryan J. , Hilten, Jacobus J. van , Simon, David K. , Eberly, Shirley , Krohn, Lynne , Freeman, Kathryn , Ruskey, Jennifer A. , Asayesh, Farnaz , Menéndez‐González, Manuel , Pástor, Pau , Ross, Owen A. , Krüger, Rejko , Kõks, Sulev, Mir, Pablo , Klucken, Jochen , Gómez‐Garre, Pilar , Fatima, Noor , Gómez-Garre, Pilar , May, Patrick , Milanowski, Łukasz M , Wszolek, Z.K. , Simon, David K , Ross, Owen A , Corvol, Jean-Christophe , Koks, Sulev , Mir, Pablo , de Bie, Rob M A , Iwaki, Hirotaka , Gan-Or, Ziv , Pastor, Pau , Ferwerda, Bart , Taba, Pille , Gomes, Clarissa P. C. , Kolodkin, Alexey N. , Wszołek, Zbigniew K. , Heutink, Peter , Álvarez, Ignacio , Yu, Eric , Freeman, Kathryn, Rudakou, Uladzislau , Corvol, Jean‐Christophe , Bie, Rob M.A. de , Gan‐Or, Ziv

Movement Disorders | August 12, 2024 | Volume: 39 | Issue: 10 | Pages: 1773-1783

10.1002/mds.29960 | PMID 39132902 Get It

Abstract Background Levodopa‐induced dyskinesia (LID) is a common adverse effect of levodopa, one of the main therapeutics used to treat the motor symptoms of Parkinson's disease (PD). Previous evidence suggests a connection between LID and a disruption of the dopaminergic system as well as genes implicated in PD, including GBA1 and LRRK2 . Objectives Our goal was to investigate the effects of genetic variants on risk and time to LID. Methods We performed a genome‐wide association study (GWAS) and analyses focused on GBA1 and LRRK2 variants. We also calculated polygenic risk scores (PRS) including risk variants for PD and variants in genes involved in the dopaminergic transmission pathway. To test the influence of genetics on LID risk we used logistic regression, and to examine its impact on time to LID we performed Cox regression including 1612 PD patients with and 3175 without LID. Results We found that GBA1 variants were associated with LID risk (odds ratio [OR] = 1.65; 95% confidence interval [CI], 1.21–2.26; P = 0.0017) and LRRK2 variants with reduced time to LID onset (hazard ratio [HR] = 1.42; 95% CI, 1.09–1.84; P = 0.0098). The fourth quartile of the PD PRS was associated with increased LID risk (OR fourth_quartile = 1.27; 95% CI, 1.03–1.56; P = 0.0210). The third and fourth dopamine pathway PRS quartiles were associated with a reduced time to development of LID (HR third_quartile = 1.38; 95% CI, 1.07–1.79; P = 0.0128; HR fourth_quartile = 1.38; 95% CI = 1.06–1.78; P = 0.0147). Conclusions This study suggests that variants implicated in PD and in the dopaminergic transmission pathway play a role in the risk/time to develop LID. Further studies will be necessary to examine how these findings can inform clinical care. © 2024 The Author(s). Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
Creation of a predictive calculator to determine adequacy of occlusion of the woven endobridge (WEB) device in intracranial aneurysms—A retrospective analysis of the WorldWide WEB Consortium database
Musmar, Basel , Adeeb, Nimer , Gendreau, Julian , Horowitz, Melanie Alfonzo , Salim, Hamza , Sanmugananthan, Praveen , Aslan, Assala , Cancelliere, Nicole M , McLellan, Rachel , Şenol, Yiğit Can , Lay, Sovann V. , Guenego, Adrien , Renieri, Leonardo, Naamani, Kareem El, Premat, Kévin , Möhlenbruch, Markus, Kral, Michael , Doron, Omer , Salem, Mohamed M , Foreman, Paul M. , Vachhani, Jay A. , Shaikh, Hamza , Župančić, Vedran , Tutino, Vincent M. , Gokhan, Yuce, İmamoğlu, Çetin , Rabinov, James D. , Ren, Yifan , Michelozzi, Caterina , Elens, Stéphanie , Starke, Robert M, Ogilvie, Mark , Nguyên, Anh , Jones, Jesse , Brinjikji, Waleed , Nawka, Marie Teresa , Psychogios, Marios, Ulfert, Christian , Diestro, Jose Danilo Bengzon , Pukenas, Bryan , Burkhardt, Jan‐Karl , Martinez-Gutierrez, Juan Carlos, Essibayi, Muhammed Amir , Spiegel, Gary, Lubicz, Boris , Puri, Ajit S., Pero, Guglielmo , Nossek, Erez , Raz, Eytan , Killer-Oberfalzer, Monika, Asadi, Hamed , Brook, Allan , Altschul, David , Ducruet, Andrew F. , Albuquerque, Felipe C. , Regenhardt, Robert W. , Stapleton, Christopher J. , Kan, Peter, Kalousek, Vladimir , Lylyk, Pedro , Boddu, Srikanth , Knopman, Jared , Tjoumakaris, Stavropoula , Clarençon, Frédéric , Bydon, Mohamad , Patel, Aman B. , Salim, Hamza , Algin, Oktay , Ghozy, Sherief , Dibas, Mahmoud , Senol, Yigit Can , Guenego, Adrien , Tjoumakaris, Stavropoula , Shotar, Eimad , Lylyk, Ivan , Foreman, Paul M , Shaikh, Hamza A , Župančić, Vedran , Hafeez, Muhammad U , Ren, Yifan , Schirmer, Clemens M , Hassan, Ameer E , Nguyen, Anh , Jones, Jesse , Ulfert, Christian , Essibayi, Muhammed Amir , Tawk, Rabih, Pero, Guglielmo , Raz, Eytan , Griessenauer, Christoph J , Siddiqui, Adnan H , Altschul, David J , Regenhardt, Robert W , Limbucci, Nicola , Cuellar-Saenz, Hugo H , Dmytriw, Adam A , Diestro, Jose Danilo B , Tutino, Vincent M , Kalousek, Vladimir , Musmar, Basel , Cancelliere, Nicole M , Lay, Sovann V , Burkhardt, Jan‐Karl , Brown, Nolan J. , Ghozy, Sherief , Dibas, Mahmoud , Orscelik, Atakan , Renieri, Leonardo , Carnevale, Joseph Anthony , Saliou, Guillaume , Mastorakos, Panagiotis , Naamani, Kareem El , Shotar, Eimad , Möhlenbruch, Markus , Chung, Charlotte , Lylyk, Iván , Hafeez, Muhammad Ubaid , Catapano, Joshua S , Waqas, Muhammad , Bayrak, Ahmet , Schirmer, Clemens M. , Piano, Mariangela , Kühn, Anna Luisa , Hassan, Ameer E , Psychogios, Marios‐Nikos , Huynh, Thien , Martinez-Gutierrez, Juan Carlos , Sheth, Sunil A , Tawk, Rabih G. , Panni, Pietro , Puri, Ajit S , Griessenauer, Christoph J. , Siddiqui, Adnan H. , Aziz‐Sultan, Mohammad Ali , Limbucci, Nicola , Hasan, David , Cuellar, Hugo , Jabbour, Pascal , Mendes Pereira, Vitor , Dmytriw, Adam A.

Interventional Neuroradiology | August 10, 2024 | Volume: No volume available | Issue: No issue available | Pages: No page available

10.1177/15910199241267320 | PMID 39127463 Get It

Background Endovascular treatment with the woven endobridge (WEB) device has been widely utilized for managing intracranial aneurysms. However, predicting the probability of achieving adequate occlusion (Raymond–Roy classification 1 or 2) remains challenging. Objective Our study sought to develop and validate a predictive calculator for adequate occlusion using the WEB device via data from a large multi-institutional retrospective cohort. Methods We used data from the WorldWide WEB Consortium, encompassing 356 patients from 30 centers across North America, South America, and Europe. Bivariate and multivariate regression analyses were performed on a variety of demographic and clinical factors, from which predictive factors were selected. Calibration and validation were conducted, with variance inflation factor (VIF) parameters checked for collinearity. Results A total of 356 patients were included: 124 (34.8%) were male, 108 (30.3%) were elderly (≥65 years), and 118 (33.1%) were current smokers. Mean maximum aneurysm diameter was 7.09 mm (SD 2.71), with 112 (31.5%) having a daughter sac. In the multivariate regression, increasing aneurysm neck size (OR 0.706 [95% CI: 0.535–0.929], p = 0.13) and partial aneurysm thrombosis (OR 0.135 [95% CI: 0.024–0.681], p = 0.016) were found to be the only statistically significant variables associated with poorer likelihood of achieving occlusion. The predictive calculator shows a c-statistic of 0.744. Hosmer–Lemeshow goodness-of-fit test indicated a satisfactory model fit with a p-value of 0.431. The calculator is available at: https://neurodx.shinyapps.io/WEBDEVICE/ . Conclusion The predictive calculator offers a substantial contribution to the clinical toolkit for estimating the likelihood of adequate intracranial aneurysm occlusion by WEB device embolization.
Neighborhood disadvantage, race, and clinical outcomes in neuromyelitis optica spectrum disorder
Abbatemarco, JR, Aboseif, Albert , Swetlik, Carol , Widmar, Julie, Harvey, Teresa, Kunchok, Amy , O’Mahony, Julia , Miller, DM, Conway, DS, Miller, Deborah , Miller, D M , Conway, D S , Pittock, Sean J , Aboseif, Albert , Abbatemarco, JR, Harvey, T, Conway, Devon

Multiple Sclerosis Journal | August 6, 2024 | Volume: 30 | Issue: 10 | Pages: 1322-1330

10.1177/13524585241267231 | PMID 39105475 Get It

Background: Little is known about the relationship between neighborhood disadvantage and neuromyelitis optica spectrum disorder (NMOSD) outcomes. Objective: The objective is to determine the impact of neighborhood disadvantage on time from symptom onset to diagnosis and annualized relapse rate (ARR). Methods: Neighborhood disadvantage were captured with the Area Deprivation Index (ADI), a validated measure of neighborhood-level disadvantage. Negative binomial regression models assessed the impact of ADI on diagnostic delay (⩾3 months between symptom onset and diagnosis) and ARR. Results: A total of 158 NMOSD patients were identified, a majority of whom were White (56.3%) and female (89.9%) with a mean age of 46 years at diagnosis. The ADI did not significantly affect odds of diagnostic delay (odds ratio (OR) = 0.99, p = 0.26). In univariable models, the ADI was not significantly associated with ARR (OR = 1.004, p = 0.29), but non-White race (OR = 1.541, p = 0.02) and time on immunosuppressive therapies (ISTs; OR = 0.994, p = 0.03) were. White patients used IST for an average of 81% of the follow-up period, compared to an average of 65% for non-White patients ( p < 0.01). Conclusion: No significant relationship between neighborhood-level disadvantage and diagnostic delay or ARR in NMOSD patients was observed. Non-White patients had a higher ARR, which may be related to less IST use.
Graded Organ Response and Progression Criteria for Kidney Immunoglobulin Light Chain Amyloidosis
Wisniowski, Brendan , Geyer, Susan, Milani, Paolo , Veelken, Kaya, Kumar, Shaji , Liedtke, Michaela , Dooley, Katharine , Landau, Heather , Petrlik, Erica , Lentzsch, Suzanne , Coltoff, Alexander , Bladé, Joan , Cibeira, María Teresa , Cohen, Oliver C. , Foard, Darren, Gillmore, Jullian, Wechalekar, Ashutosh , Gertz, Morie A., Milani, Paolo , Gillmore, Julian D , Muchtar, Eli , Palladini, Giovanni , Merlini, Giampaolo , Schönland, Stefan , Hegenbart, Ute , Leung, Nelson , Dispenzieri, Angela , Kastritis, Efstathios , Dimopoulos, Meletios Α. , Ulloa, Patricia, Sanchorawala, Vaishali , Szalat, Raphaël , Cohen, Oliver , Gillmore, Julian D. , Lachmann, Helen J. , Wechalekar, Ashutosh D. , Gertz, Morie A.

JAMA Oncology | August 1, 2024 | Volume: 10 | Issue: 10 | Pages: 1362

10.1001/jamaoncol.2024.2629 | PMID 39088206 Get It

ImportanceKidney light chain (AL) amyloidosis is associated with a risk of progression to kidney replacement therapy (KRT) and death. Several studies have shown that a greater reduction in proteinuria following successful anticlonal therapy is associated with improved outcomes.ObjectiveTo validate graded kidney response criteria and their association with kidney and overall survival (OS).Design, Setting, and ParticipantsThis retrospective, multicenter cohort was conducted at 10 referral centers for amyloidosis from 2010 to 2015 and included patients with kidney AL amyloidosis that was evaluable for kidney response and who achieved at least hematologic partial response within 12 months of diagnosis. The median follow-up was 69 (54-88) months. Data analysis was conducted in 2023.ExposureFour kidney response categories based on the reduction in pretreatment 24-hour urine protein (24-hour UP) levels: complete response (kidCR, 24-hour UP ≤200 mg), very good partial response (kidVGPR, &amp;gt;60% reduction in 24-hour UP), partial response (kidPR, 31%-60% reduction), and no response (kidNR, ≤30% reduction). Kidney response was assessed at landmark points (6, 12, and 24 months) and best kidney response.Main Outcomes and MeasuresCumulative incidence of progression to KRT and OS.ResultsSeven-hundred and thirty-two patients (335 women [45.8%]) were included, with a median (IQR) age of 63 (55-69) years. The median (IQR) baseline 24-hour proteinuria and estimated glomerular filtration rate was 5.3 (2.8-8.5) g per 24 hours and 72 (48-92) mL/min/1.73m2, respectively. In a competing-risk analysis, the 5-year cumulative incidence rates of progression to KRT decreased with deeper kidney responses as early as 6 months from therapy initiation (11%, 12%, 2.1%, and 0% for kidNR, kidPR, kidVGPR, and kidCR, respectively; P = .002) and were maintained at 12 months and 24 months and best kidney response. Patients able to achieve kidCR/kidVGPR by 24 months and at best response had significantly better OS compared with kidPR/kidNR. Kidney progression, defined as a 25% or greater decrease in estimated glomerular filtration rate, was associated with cumulative incidence of progression to KRT and OS.Conclusions and RelevanceThe results of this cohort study suggest that graded kidney response criteria offers clinically and prognostically meaningful information for treating patients with kidney AL amyloidosis. The response criteria potentially inform kidney survival based on the depth of reduction in 24-hour proteinuria levels and demonstrate an OS advantage for those able to achieve kidCR/kidVGPR compared with kidPR/kidNR. Taken together, achievement of at least kidVGPR by 12 months is needed to ultimately improve kidney and patient survival.
Cardiovascular Toxicities of Immune Therapies for Cancer – A Scientific Statement of the Heart Failure Association (HFA) of the ESC and the ESC Council of Cardio-Oncology
Tocchetti, Carlo G. , Farmakis, Dimitrios , Koop, Yvonne , Andrés, María Sol , Formisano, Luigi , Ciardiello, Fortunato, Emmerich, Max , Plummer, Chris , Gulati, Geeta , Ramalingam, Sivatharshini , Brezden‐Masley, Christine , Iakobishvili, Zaza , Bergler‐Klein, Jutta , Boer, Rudolf A. de , Rassaf, Tienush, Fradley, Michael G. , Moslehi, Javid J. , Yang, Eric H., Neilan, Tomas G. , Herrmann, Joerg , Mirabel, Mariana , Skouri, Hadi , Cohen‐Solal, Alain , Sverdlov, Aaron L. , Meer, Peter van der, Asteggiano, Riccardo , Ky, Bonnie , Seferović, Petar , Metra, Marco , Rosano, Giuseppe, Suter, Thomas, Tocchetti, Carlo Gabriele , López-Fernández, Teresa , de Boer, Rudolf A , Ky, Bonnie , Sverdlov, Aaron L , Metra, Marco , Couch, Liam Steven , Ciardiello, Fortunato , Pane, Fabrizio , Au, Lewis , Cardinale, Daniela , Thavendiranathan, Paaladinesh , Santoro, Ciro , Keramida, Kalliopi , Maack, Christoph , Lutgens, Esther , Rassaf, Tienush , Yang, Eric H., Keulenaer, Gilles W. De , Ameri, Pietro , Bax, Jeroen J. , Mbakwem, Amam , Hirsch, Emilio , Meer, Peter van der , Barac, Ana , Lenihan, Daniel , Dent, Susan , Coats, Andrew J.S. , López‐Fernández, Teresa , Lyon, Alexander R.

European Journal of Heart Failure | August 1, 2024 | Volume: 26 | Issue: 10 | Pages: 2055-2076

10.1002/ejhf.3340 | PMID 39087551 Get It

ABSTRACT The advent of immunological therapies has revolutionized the treatment of solid and haematological cancers over the last decade. Licensed therapies which activate the immune system to target cancer cells can be broadly divided into two classes. The first class are antibodies that inhibit immune checkpoint signalling, known as immune checkpoint inhibitors (ICIs). The second class are cell-based immune therapies including chimeric antigen receptor T lymphocyte (CAR-T) cell therapies, natural killer (NK) cell therapies, and tumour infiltrating lymphocyte (TIL) therapies. The clinical efficacy of all these treatments generally outweighs the risks, but there is a high rate of immune-related adverse events (irAEs), which are often unpredictable in timing with clinical sequalae ranging from mild (e.g. rash) to severe or even fatal (e.g. myocarditis, cytokine release syndrome) and reversible to permanent (e.g. endocrinopathies).The mechanisms underpinning irAE pathology vary across different irAE complications and syndromes, reflecting the broad clinical phenotypes observed and the variability of different individual immune responses, and are poorly understood overall. Immune-related cardiovascular toxicities have emerged, and our understanding has evolved from focussing initially on rare but fatal ICI-related myocarditis with cardiogenic shock to more common complications including less severe ICI-related myocarditis, pericarditis, arrhythmias, including conduction system disease and heart block, non-inflammatory heart failure, takotsubo syndrome and coronary artery disease. In this scientific statement on the cardiovascular toxicities of immune therapies for cancer, we summarize the pathophysiology, epidemiology, diagnosis, and management of ICI, CAR-T, NK, and TIL therapies. We also highlight gaps in the literature and where future research should focus.
Pharmacologic Efficacy in Neuropsychiatry
Rummans, Teresa A. , Lauterbach, Edward C., Coffey, C. Edward, Royall, Donald R. , Salloway, Stephen , Duffy, James , Kaufer, Daniel , Cummings, Jeffrey L. , Duffy, James

The Journal of Neuropsychiatry and Clinical Neurosciences | July 31, 2024 | Volume: 11 | Issue: 2 | Pages: 176-189

10.1176/jnp.11.2.176 | PMID 10333990 Get It

Vigorous Exercise in Patients With Congenital Long QT Syndrome: Results of the Prospective, Observational, Multinational LIVE-LQTS Study
Lampert, Rachel , Day, Sharlene M. , Ainsworth, Barbara E. , Burg, Matthew M. , Marino, Bradley S. , Salberg, Lisa , Tome, Maite , Abrams, Dominic J. , Aziz, Peter F. , Barth, Cheryl , Behr, Elijah R. , Bell, Cheyanne , Berul, Charles I. , Bos, J. Martijn , Cannom, David S. , Cannon, Bryan C. , Concannon, Maryann, Czosek, Richard J. , Dubin, Anne M. , Dziura, James , Erickson, Christopher C. , Etheridge, Susan P. , Gray, Belinda , Haglund-Turnquist, Carla , Johnsrude, Christopher L. , Lara, Alice, Saarel, Elizabeth V. , Sanatani, Shubhayan , Shah, Maully J. , Simone, Laura, Tomaselli, Gordon F., Ware, James S. , Zaręba, Wojciech , Ackerman, Michael J. , Day, Sharlene , Burg, Matthew , Tome Esteban, Maria Teresa , Bos, Johan M , Cannon, Bryan C , Cerrone, Marina , Czosek, Richard J , Dubin, Anne M , Dziura, James , Erickson, Christopher C , Estes, N.A. Mark , Etheridge, Susan P , Goldenberg, Ilan , Gray, Belinda , Haglund-Turnquist, Carla M , Harmon, Kimberly G , James, Cynthia A , Johnsrude, Christopher , Kannankeril, Prince J , Law, Ian H , Link, Mark S. , Molossi, Silvana M , Olshansky, Brian , Noseworthy, Peter A , Saarel, Elizabeth V , Sanatani, Shubhayan , Shah, Maully , Skinner, Jonathan R , Ware, James S , Webster, Gregory , Zareba, Wojciech , Zipes, Douglas P , Ackerman, Michael J , Behr, Elijah Raphael , Abrams, Dominic J , Bradley, David J. , Cerrone, Marina , Goldenberg, Ilan , Harmon, Kimberly G. , James, Cynthia A. , Kannankeril, Prince J. , Law, Ian H. , Li, Fangyong , Olshansky, Brian , Noseworthy, Peter A. , Skinner, Jonathan R. , Webster, Gregory , Zipes, Douglas P.

Circulation | July 25, 2024 | Volume: 150 | Issue: 7 | Pages: 516-530

10.1161/circulationaha.123.067590 | PMID 39051104 Get It

BACKGROUND: Whether vigorous exercise increases risk of ventricular arrhythmias for individuals diagnosed and treated for congenital long QT syndrome (LQTS) remains unknown. METHODS: The National Institutes of Health–funded LIVE-LQTS study (Lifestyle and Exercise in the Long QT Syndrome) prospectively enrolled individuals 8 to 60 years of age with phenotypic and/or genotypic LQTS from 37 sites in 5 countries from May 2015 to February 2019. Participants (or parents) answered physical activity and clinical events surveys every 6 months for 3 years with follow-up completed in February 2022. Vigorous exercise was defined as ≥6 metabolic equivalents for >60 hours per year. A blinded Clinical Events Committee adjudicated the composite end point of sudden death, sudden cardiac arrest, ventricular arrhythmia treated by an implantable cardioverter defibrillator, and likely arrhythmic syncope. A National Death Index search ascertained vital status for those with incomplete follow-up. A noninferiority hypothesis (boundary of 1.5) between vigorous exercisers and others was tested with multivariable Cox regression analysis. RESULTS: Among the 1413 participants (13% <18 years of age, 35% 18–25 years of age, 67% female, 25% with implantable cardioverter defibrillators, 90% genotype positive, 49% with LQT1, 91% were treated with beta-blockers, left cardiac sympathetic denervation, and/or implantable cardioverter defibrillator), 52% participated in vigorous exercise (55% of these competitively). Thirty-seven individuals experienced the composite end point (including one sudden cardiac arrest and one sudden death in the nonvigorous group, one sudden cardiac arrest in the vigorous group) with overall event rates at 3 years of 2.6% in the vigorous and 2.7% in the nonvigorous exercise groups. The unadjusted hazard ratio for experience of events for the vigorous group compared with the nonvigorous group was 0.97 (90% CI, 0.57–1.67), with an adjusted hazard ratio of 1.17 (90% CI, 0.67–2.04). The upper 95% one-sided confidence level extended beyond the 1.5 boundary. Neither vigorous or nonvigorous exercise was found to be superior in any group or subgroup. CONCLUSIONS: Among individuals diagnosed with phenotypic and/or genotypic LQTS who were risk assessed and treated in experienced centers, LQTS-associated cardiac event rates were low and similar between those exercising vigorously and those not exercising vigorously. Consistent with the low event rate, CIs are wide, and noninferiority was not demonstrated. These data further inform shared decision-making discussions between patient and physician about exercise and competitive sports participation. REGISTRATION: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT02549664.