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BACKGROUND: Residual transprosthetic gradient (TG) after transcatheter aortic valve replacement (TAVR) with balloon-expandable valves (BEV) may be due to suboptimal valve expansion. AIMS: To compare hemodynamics after TAVR with small BEV according to postdilation strategy. METHODS: This observational, retrospective cohort study included 184 consecutive patients from a single center treated with 23 mm Sapien 3 Ultra (Edwards Lifesciences) BEV implantation in the aortic position and enrolled between January 2020 and April 2023. Patients treated with routine postdilation (RP, n = 73) were compared to patients treated according to local standard practice (SP, n = 111). Primary endpoint was 30-day mean TG. Secondary endpoints were incidence of 30-day prosthesis-patient mismatch (PPM), technical success and device success. RESULTS: Thirty-day mean TG was lower in RP versus SP (12.3 ± 4.6 mmHg vs. 14.1 ± 5.7 mmHg, p = 0.031), and incidence of PPM was less common with RP versus SP (47.3% vs. 71.0%, p = 0.006). Technical success (98.6% vs. 99.1%, p = 0.637) and device success (93.1% vs. 90.1%, p = 0.330) did not differ between groups. Differences in 30-day mean TG were driven by patients at normal flow (12.1 ± 4.0 mmHg vs. 15.0 ± 5.5 mmHg, p = 0.014), while no differences were evident among patients at low flow (12.5 ± 5.5 mmHg vs. 11.7 ± 5.5 mmHg, p = 0.644). RP decreased height and increased width of BEV, and a linear regression established that final BEV width could predict 30-day mean TG (r = -0.6654, p < 0.0001). CONCLUSIONS: RP after TAVR with small BEV was associated with more favorable forward-flow hemodynamics than SP.
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BACKGROUND: Antiplatelet therapy is recommended among patients with established atherosclerosis. We compared monotherapy with a P2Y12 inhibitor versus aspirin for secondary prevention. METHODS: In this systematic review and meta-analysis, all randomised trials comparing P2Y12 inhibitor with aspirin monotherapy for secondary prevention in patients with cerebrovascular, coronary, or peripheral artery disease were evaluated for inclusion. On Dec 18, 2019, we searched PubMed, Embase, BioMedCentral, Google Scholar, and the Cochrane Central Register of Controlled Trials. Additionally, we reviewed references from identified articles and searched abstracts from 2017 to 2019 presented at relevant scientific meetings. Data about year of publication, inclusion and exclusion criteria, sample size, baseline patients' features including the baseline condition determining study inclusion (ie, cerebrovascular, coronary, or peripheral artery disease), P2Y12 inhibitor type and dosage, aspirin dosage, endpoint definitions, effect estimates, follow-up duration, and percentage of patients lost to follow-up were collected. Odds ratios (ORs) and 95% CIs were used as metric of choice for treatment effects with random-effects models. Co-primary endpoints were myocardial infarction and stroke. Key secondary endpoints were all-cause death and vascular death. Heterogeneity was assessed with the I2 index. This study is registered with PROSPERO (CRD42018115037). FINDINGS: A total of nine randomised trials were identified and included in this study, and 42â108 patients randomly allocated to a P2Y12 inhibitor (n=21â043) or aspirin (n=21â065) were included in our analyses. Patients who received a P2Y12 inhibitor had a borderline reduction for the risk of myocardial infarction compared with those who received aspirin (OR 0·81 [95% CI 0·66-0·99]; I2=10·9%). Risks of stroke (OR 0·93 [0·82-1·06]; I2=34·5%), all-cause death (OR 0·98 [0·89-1·08]; I2=0%), and vascular death (OR 0·97 [0·86-1·09]; I2=0%) did not differ between patients who received a P2Y12 inhibitor and those who received aspirin. Similarly, the risk of major bleeding (OR 0·90 [0·74-1·10]; I2=3·9%) did not differ between patients who received a P2Y12 inhibitor and those who received aspirin. The number needed to treat to prevent one myocardial infarction with P2Y12 inhibitor monotherapy was 244 patients. Findings were consistent regardless of the type of P2Y12 inhibitor used. INTERPRETATION: Compared with aspirin monotherapy, P2Y12 inhibitor monotherapy is associated with a risk reduction for myocardial infarction and a comparable risk of stroke in the setting of secondary prevention. The benefit of P2Y12 inhibitor monotherapy is of debatable clinical relevance, in view of the high number needed to treat to prevent a myocardial infarction and the absence of any effect on all-cause and vascular mortality. FUNDING: Italian Ministry of Education.
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Aspirina/uso terapéutico , Aterosclerosis/tratamiento farmacológico , Clopidogrel/uso terapéutico , Inhibidores de Agregación Plaquetaria/uso terapéutico , Antagonistas del Receptor Purinérgico P2Y/uso terapéutico , Ticagrelor/uso terapéutico , Ticlopidina/uso terapéutico , Anciano , Aterosclerosis/complicaciones , Trastornos Cerebrovasculares/tratamiento farmacológico , Enfermedad Coronaria/tratamiento farmacológico , Femenino , Hemorragia/inducido químicamente , Humanos , Masculino , Persona de Mediana Edad , Infarto del Miocardio/prevención & control , Enfermedad Arterial Periférica/tratamiento farmacológico , Ensayos Clínicos Controlados Aleatorios como Asunto , Medición de Riesgo , Prevención Secundaria/métodos , Accidente Cerebrovascular/prevención & controlRESUMEN
OBJECTIVE: This single-center, retrospective analysis investigated the clinical outcomes of a novel vascular closure device (VASCADE, Cardiva Medical, Santa Clara, CA) for closure of 7F femoral venotomies. BACKGROUND: The VASCADE closure device has been widely used to close arteriotomy sites following femoral procedures; however, little data have been published regarding the device's utility in closure of venotomy sites after procedures such as right-heart catheterization. METHODS: This was a retrospective analysis of outcomes in 102 consecutive patients who underwent venous closure using the VASCADE device following diagnostic right and left-heart catheterization between April 2016 to May 2018. Patients' age, gender, valvular disease status, comorbidities, and periprocedural use of antiplatelet/anticoagulant therapy were analyzed. RESULTS: Closure was successful in 99% (101/102) of patients with respect to achieving the primary outcome of rapid hemostasis in ≤3 min. There was one device failure requiring manual compression, with no further complications. There were no other related adverse events or complications through 30 days of follow-up. CONCLUSIONS: The VASCADE device achieved venous hemostasis in nearly all our patients. We believe devices for venous closure can aid in improving patient experience, safety, and efficiency during these procedures.
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Cateterismo Cardíaco , Cateterismo Periférico , Vena Femoral , Hemorragia/prevención & control , Hemostasis , Técnicas Hemostáticas/instrumentación , Dispositivos de Cierre Vascular , Anciano , Anciano de 80 o más Años , Cateterismo Cardíaco/efectos adversos , Cateterismo Periférico/efectos adversos , Diseño de Equipo , Falla de Equipo , Femenino , Hemorragia/etiología , Técnicas Hemostáticas/efectos adversos , Humanos , Masculino , Persona de Mediana Edad , Punciones , Estudios Retrospectivos , Factores de Riesgo , Factores de Tiempo , Resultado del TratamientoAsunto(s)
Estenosis de la Válvula Aórtica , Prótesis Valvulares Cardíacas , Trombosis , Reemplazo de la Válvula Aórtica Transcatéter , Anticoagulantes/efectos adversos , Válvula Aórtica/cirugía , Estenosis de la Válvula Aórtica/cirugía , Humanos , Trombosis/etiología , Reemplazo de la Válvula Aórtica Transcatéter/efectos adversos , Resultado del TratamientoRESUMEN
Acute hemodynamic compromise after transcatheter aortic valve replacement (TAVR) because of dynamic left ventricle (LV) obstruction (LVO), also known as suicide LV, is an infrequent but severe complication of TAVR that is poorly defined in previous studies. Understanding this complication is essential for its prompt diagnosis and optimal treatment. We conducted a systematic literature review using PubMed, Embase, Web of Science, and Medline databases for studies describing acute hemodynamic compromise after TAVR because of dynamic LVO or suicide LV. Each study was reviewed by 2 authors individually for eligibility, and a third author resolved disagreements. From a total of 506 studies, 25 publications were considered for the final analysis. The majority of patients with this condition were women demonstrating a hypertrophic septum, a small ventricle, and hyperdynamic contractility on pre-TAVR echocardiographic assessment. An intraventricular gradient before TAVR was found in half of the cases. Acute hemodynamic compromise after TAVR because of dynamic LVO manifested mainly as significant hypotension and occurred most often immediately after valve deployment. The LV outflow tract was the most common site of obstruction. Advanced therapies were required in nearly 65% of the cases. In conclusion, acute hemodynamic compromise after TAVR because of dynamic LVO occurred almost invariably in women. Echocardiography before TAVR may offer essential information to anticipate this complication. LV outflow tract obstruction appears to carry the highest risk of developing this phenomenon. Advanced therapies should be promptly considered as a bailout strategy in patients with hemodynamic collapse refractory to medical therapy.
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Estenosis de la Válvula Aórtica , Hemodinámica , Reemplazo de la Válvula Aórtica Transcatéter , Obstrucción del Flujo Ventricular Externo , Humanos , Reemplazo de la Válvula Aórtica Transcatéter/efectos adversos , Estenosis de la Válvula Aórtica/cirugía , Hemodinámica/fisiología , Obstrucción del Flujo Ventricular Externo/etiología , Obstrucción del Flujo Ventricular Externo/fisiopatología , Complicaciones Posoperatorias/etiología , Ecocardiografía , Ventrículos Cardíacos/fisiopatología , Ventrículos Cardíacos/diagnóstico por imagenRESUMEN
BACKGROUND: The performance of latest iteration transcatheter aortic valve replacement platforms in patients with small aortic anatomy remains underexplored. OBJECTIVES: The aim of this study was to evaluate effectiveness and performance between the self-expanding (SE) Evolut PRO and PRO+ and the balloon-expandable (BE) SAPIEN ULTRA in patients with small aortic annuli. METHODS: Data from the OPERA-TAVI (Comparative Analysis of Evolut PRO vs. SAPIEN 3 ULTRA Valves for Transfemoral Transcatheter Aortic Valve Implantation) registry were used, with 1:1 propensity score matching. Primary endpoints included 1-year effectiveness composite (all-cause mortality, disabling stroke, or heart failure hospitalization) and 30-day device-related (hemodynamic structural valve dysfunction and nonstructural valve dysfunction) outcomes. RESULTS: Among 3,516 patients, 251 matched pairs with aortic annular area <430 mm2 were assessed. The 1-year primary effectiveness outcome did not differ significantly between cohorts (SE 10.8% vs BE 11.2%; P = 0.91). The 30-day device-oriented composite outcome was more favorable in the Evolut PRO group (SE 4.8% vs BE 10.4%; P = 0.027). Notably, SE valve recipients showed higher rates of disabling stroke (SE 4.0% vs BE 0.0%; P < 0.01) and paravalvular leaks (mild or greater: SE 48.5% vs BE 18.6% [P < 0.001]; moderate: SE 4.5% vs BE 1.2% [P = 0.070]). The BE group had higher rates of prosthesis-patient mismatch (moderate or greater: SE 16.0% vs BE 47.1% [P < 0.001]; severe: SE 1.3% vs BE 5.7% [P = 0.197]) and more patients with residual mean gradients >20 mm Hg (SE 1.0% vs BE 13.5%; P < 0.001). CONCLUSIONS: In patients with small aortic annuli, transcatheter aortic valve replacement with latest iteration devices is safe. SE platforms are associated with more favorable device performance in terms of hemodynamic structural and nonstructural dysfunction. Randomized data are needed to validate these findings and guide informed device selection.
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Estenosis de la Válvula Aórtica , Prótesis Valvulares Cardíacas , Accidente Cerebrovascular , Reemplazo de la Válvula Aórtica Transcatéter , Humanos , Válvula Aórtica/diagnóstico por imagen , Válvula Aórtica/cirugía , Estenosis de la Válvula Aórtica/diagnóstico por imagen , Estenosis de la Válvula Aórtica/cirugía , Diseño de Prótesis , Resultado del Tratamiento , Sistema de Registros , Accidente Cerebrovascular/etiologíaRESUMEN
Patients with tricuspid regurgitation are often referred late in their disease course and present with volume overload, which is a detrimental factor leading to right-sided chamber dilatation and dysfunction. Treatment of volume overload can 1) improve patient functional status; 2) avoid repeated invasive examinations; and 3) establish eligibility for transcatheter tricuspid intervention. (Level of Difficulty: Intermediate.).
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INTRODUCTION: Evidence about the use of direct oral anticoagulants (DOACs) in patients with left ventricular thrombosis (LVT) are emerging. The aim of our study was to provide a comprehensive synthesis of the available evidence concerning the clinical effects of DOACs versus vitamin K antagonists (VKAs) in LVT treatment. EVIDENCE ACQUISITION: Systematic search of studies evaluating DOACs versus VKAs use in patients with LVT was performed on May 11th, 2021. Data were pooled by meta-analysis using a random-effects model. Odds ratios (OR) with relative 95% confidence intervals (CI) were used as measures of effect estimates. The primary efficacy and safety endpoint were ischemic stroke and any bleeding, respectively. Secondary endpoints were LVT resolution, systemic embolism, major bleeding, hemorrhagic stroke, and all cause death. EVIDENCE SYNTHESIS: Twenty studies were included in the meta-analysis: 1,391 patients were treated with DOACs and 1,534 with VKAs. A significant reduction in the risk of ischemic stroke (OR 0.67, 95% CI, 0.45-0.98, P=0.048, number needed to treat to benefit [NNTB] 22 [95% CI 15-43]) and any bleeding (OR 0.64, 95% CI 0.46-0.89, P=0.009, NNTB 26 [95% CI 16-80]) was observed with DOACs compared to VKAs. No statistically significant difference was observed among the two treatment arms for the secondary endpoints. CONCLUSIONS: Compared to VKAs, DOACs are associated with a reduced risk of ischemic stroke and bleeding. In light of these findings, and the practical advantages of DOACs, additional large scale randomized controlled trials are needed to confirm the benefits of DOACs in patients with LVT.
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Accidente Cerebrovascular Isquémico , Trombosis , Humanos , Anticoagulantes/efectos adversos , Hemorragia/inducido químicamente , Hemorragia/tratamiento farmacológico , Trombosis/tratamiento farmacológico , Trombosis/inducido químicamente , Fibrinolíticos/uso terapéutico , Accidente Cerebrovascular Isquémico/inducido químicamente , Accidente Cerebrovascular Isquémico/tratamiento farmacológico , Vitamina KRESUMEN
Background: Simultaneous ulnar and radial artery compression (SURC) has emerged as a strategy to increase radial artery flow and mitigate radial artery occlusion (RAO) while achieving adequate hemostasis after transradial access (TRA), though its technical adoption has been limited worldwide. Methods: A systematic search of studies comparing SURC versus isolated radial artery compression after TRA for coronary angiography and/or intervention was performed. Data were pooled by meta-analysis using random-effects models. Odds ratios (OR) with relative 95% confidence intervals (CI) and standardized mean difference were used as measures of effect estimates. The primary endpoint was the occurrence of overall RAO. Results: A total of 6 studies and 6793 patients were included. SURC method as compared to isolated radial artery compression was associated with a lower risk of RAO both overall (OR 0.29; 95% CI, 0.13−0.61, p < 0.001; number needed to treat to benefit [NNTB] =38) and in-hospital (OR 0.28; 95% CI: 0.10 to 0.75; p = 0.01, NNTB = 36), with a reduced risk of unsuccessful patent hemostasis (OR: 0.13; 95% CI: 0.02 to 0.85; p = 0.03, NNT = 5) and upper extremity pain (OR: 0.48; 95% CI: 0.24 to 0.95; p = 0.04, NNTB = 124). No significant difference was observed in hemostasis time and in the risk of hematoma. Conclusion: Compared to isolated radial artery compression, SURC is associated with lower risk of RAO, unsuccessful patent hemostasis, and reported upper limb pain, without any trade-off in safety outcomes. With further development of dedicated dual compression devices, the proposed technique should be freed from usage constraints.
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INTRODUCTION: Despite the technological advances and increasing operator experience, the rate of permanent pacemaker implantation (PPI) after transcatheter aortic valve replacement (TAVR) has not decreased over time. With a continuous downward trend in post-TAVR length of stay, prolonged home-monitoring may have a key role in detecting potentially serious conduction abnormalities after TAVR discharge. METHODS: In this study, the ZioPatch-AT monitor was used to detect conduction abnormalities after TAVR discharge. The cardiac monitoring device was systematically provided to all patients having pre-existing right bundle branch block or developing intra-/peri-procedural conduction disturbances, in the absence of guideline indication for PPI at discharge. RESULTS: From a total of 75 patients at high-risk of conduction disturbances, 8 (11%) of them underwent PPI and most of them (6/8) were detected before symptoms' occurrence. Paired analysis between baseline and discharge electrocardiograms detected a significant widening of the QRS in all patients; on the contrary, PR length was significantly increased only in the group experiencing HAVB after discharge (p < 0.01). CONCLUSIONS: In an early post-TAVR discharge era, 30-day outpatient cardiac rhythm monitoring is potentially a safe solution to allow timely recognition of new conduction disturbances requiring PPI.
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Estenosis de la Válvula Aórtica , Marcapaso Artificial , Reemplazo de la Válvula Aórtica Transcatéter , Válvula Aórtica/cirugía , Estenosis de la Válvula Aórtica/diagnóstico , Trastorno del Sistema de Conducción Cardíaco/diagnóstico , Trastorno del Sistema de Conducción Cardíaco/etiología , Trastorno del Sistema de Conducción Cardíaco/terapia , Estimulación Cardíaca Artificial , Estudios de Factibilidad , Humanos , Marcapaso Artificial/efectos adversos , Alta del Paciente , Factores de Riesgo , Telemetría , Reemplazo de la Válvula Aórtica Transcatéter/efectos adversos , Resultado del TratamientoRESUMEN
AIMS: Patients with chronic kidney disease (CKD) are at increased risk of cardiovascular disease and have a worse prognosis after percutaneous coronary interventions (PCI). The BioFreedom polymer-free biolimus-A9-eluting stent (PF-BES) has shown promising results in patients at high bleeding risk; however, its performance in CKD patients has yet to be analyzed. METHODS: The all-comers RUDI-FREE registry documented patients undergoing PCI with PF-BES in routine clinical practice. Patients were stratified into three groups according to their estimated glomerular filtration rate (eGFR): preserved renal function, mild renal insufficiency (RI), and with moderate to severe RI (eGFR ≥ 90, between 90 and 45, and <45âml/min/1.73âm2, respectively). The primary safety end point was a patient-oriented composite end point of cardiovascular death, myocardial infarction (MI), and definite or probable stent thrombosis (ST). The primary efficacy end point was target lesion revascularization (TLR). RESULTS: The registry documented 1,104 consecutive patients treated with PF-BES: 258 (23.4%) with preserved renal function, whereas 712 (64.7%) and 131 (11.9%) had mild and moderate to severe RI, respectively. At 1âyear, the primary safety end point was significantly higher in patients with moderate to severe RI (3.5% vs. 2.8% vs. 11.5%; Pâ<â0.001). Conversely, TLR proved similar among groups (0.4% vs. 1.8% vs. 0.8%; Pâ=â0.235). CONCLUSIONS: Patients with worse renal function had increased risk of the composite of cardiovascular deaths, MI, and definite or probable ST. However, the PF-BES showed similar efficacy despite differences in renal function. These findings need to be confirmed in large-scale randomized trials.
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Stents Liberadores de Fármacos , Intervención Coronaria Percutánea , Insuficiencia Renal Crónica/epidemiología , Sirolimus/análogos & derivados , Anciano , Enfermedades Cardiovasculares/mortalidad , Stents Liberadores de Fármacos/efectos adversos , Femenino , Humanos , Masculino , Persona de Mediana Edad , Infarto del Miocardio/epidemiología , Estudios Prospectivos , Sistema de Registros , Trombosis/epidemiologíaRESUMEN
BACKGROUND: Transcatheter tricuspid valve replacement (TTVR) is rapidly emerging as a therapeutic option amongst patients with secondary tricuspid regurgitation. Historical data from surgical tricuspid valve replacement (TVR) studies may serve as a benchmark for the development of TTVR trials. AIMS: The aim of the study was to investigate the early and late outcomes following isolated surgical TVR. METHODS: Multiple electronic databases were searched to identify studies on isolated surgical TVR. The prespecified primary endpoint was operative mortality; secondary endpoints were early and late outcomes. Overall estimates of proportions and incidence rates with 95% confidence intervals (CI) were calculated using random-effects models. Multiple sensitivity analyses accounting for baseline characteristics, country and the operative period were applied. Results: A total of 35 studies (5,316 patients) were included in this meta-analysis. The operative period ranged from 1974 to 2019. The overall rate of operative mortality was 12% (95% CI: 9-15), with higher mortality for patients who were operated on before 1995, who had prior cardiac surgeries, or who had liver disease. The most frequent clinical events were pacemaker implantation (10% [95% CI: 6-16]), bleeding (12% [95% CI: 8-17]), acute kidney injury (15% [95% CI: 9-24]) and respiratory complications (15% [95% CI: 12-20]). At follow-up analysis of the bioprosthetic TVR, there was an incidence rate per 100 person-years of 6 (95% CI: 2-13) for death and 8 (95% CI: 5-13) for recurrence of significant tricuspid regurgitation. CONCLUSIONS: This meta-analysis provides an overview of the historical clinical outcomes following isolated surgical TVR. These findings can support the development of future clinical trials in the tricuspid space by providing thresholds for clinical outcomes.
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Implantación de Prótesis de Válvulas Cardíacas , Prótesis Valvulares Cardíacas , Insuficiencia de la Válvula Tricúspide , Humanos , Insuficiencia de la Válvula Tricúspide/cirugía , Insuficiencia de la Válvula Tricúspide/complicaciones , Válvula Tricúspide/cirugía , Implantación de Prótesis de Válvulas Cardíacas/efectos adversos , Resultado del Tratamiento , Estudios RetrospectivosRESUMEN
(1) Shorter-duration dual antiplatelet therapy (DAPT) followed by single antiplatelet therapy has been shown to significantly reduce bleeding events while preserving anti-ischemic effects in patients undergoing conventional percutaneous coronary interventions (PCI). Whether this strategy is also safe and effective in complex PCI remains elusive; (2) A systematic search of randomized controlled trials comparing a short course of ticagrelor-based DAPT versus standard DAPT in patients undergoing complex PCI was performed; (3) Of 10,689 studies screened, 3 were identified for a total of 4176 participants on ticagrelor monotherapy after a short course of ticagrelor-based DAPT, and 4209 on standard DAPT. The pooled analysis revealed no difference in the outcomes of major bleeding, myocardial infarction, definite or probable stent thrombosis and ischemic stroke. A significant reduction in the risk of cardiovascular death (incidence rate ratio (IRR) 0.52; 95% CI 0.28-0.96; p = 0.04), all-cause death (IRR 0.65; 95% CI 0.49-0.86; p = 0.003), and any bleeding events (IRR 0.62; 95% CI 0.47-0.81; p < 0.001) was seen in the shorter DAPT group; (4) Among patients undergoing complex PCI, ticagrelor monotherapy after a short course of ticagrelor-based DAPT significantly reduced bleeding risk without increasing ischemic risk. More data are needed to definitively explain mortality benefits.
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Background: The authors examined the association between colchicine treatment and clinical outcomes in patients with coronary artery disease. Methods: They performed a meta-analysis of randomised controlled trials (RCTs) involving patients with coronary artery disease receiving addon colchicine to standard treatment compared with standard treatment. They used a mixed-effects Poisson regression model with random intervention effects to estimate the pooled incidence rate ratios (IRR) with 95% CI. Results: Ten RCTs were identified, including 12,819 participants followed up for a median of 6 months. Colchicine was associated with a lower risk of major adverse cardiovascular events (IRR 0.69; 95% CI [0.60-0.79]; number needed to treat for an additional beneficial outcome [NNTB] = 28); MI (IRR 0.77; 95% CI [0.64-0.93]; NNTB = 95) and ischaemic stroke (IRR 0.48; 95% CI [0.30-0.76]; NNTB = 155) and with a higher risk of gastrointestinal adverse events (IRR 1.69; 95% CI [1.12-2.54]; number needed to treat for an additional harmful outcome [NNTH] = 10). Colchicine did not affect all-cause death (IRR 1.09; 95% CI [0.85-1.40]), or cardiovascular death (IRR 0.75; 95% CI [0.51-1.12]), while it was associated with a higher risk of non-cardiovascular death (IRR 1.45; 95% CI [1.04-2.02]; NNTH = 396). Conclusion: The meta-analysis showed that the relative and absolute beneficial treatment effects of colchicine on cardiovascular outcomes outweigh the potential harm for non-cardiovascular mortality. Registration: PROSPERO 2021 CRD42021248874.