13 documents found, page 1 of 2
Preprocedural imaging guiding ventricular tachycardia ablation in structural he...
Ferreira, Afonso Nunes; Brito, Joana; Cortez-Dias, Nuno; Lima da Silva, Gustavo; Pinto, Fausto J.; De Sousa, JoãoBackground: Integration of preprocedural imaging techniques in ventricular tachycardia (VT) ablation may improve the identification of arrhythmogenic substrates, particularly relevant for patients with nonischemic cardiomyopathy (NICM) with sub-optimal outcomes. We assessed the impact of advanced preprocedural imaging on the safety and long-term efficacy of radiofrequency catheter ablation (RCA) for VT, compari...
Does a left common pulmonary trunk anatomy represent a real limitation for atri...
Brito, Joana; Rodrigues, Tiago; António, Pedro Silvério; Ferreira, Afonso Nunes; Lima Da Silva, Gustavo; Bernardes, Ana; Barreiros, Céu; Ribeiro, JoãoCryoballoon ablation (CBA) has been increasingly used for atrial fbrillation (AF) ablation. The presence of pulmonary vein (PV) anatomical variants, particularly left common pulmonary trunk (LCPT), may limit the cryoballoon adaptability and performance. To evaluate the impact of the presence of LCPT in CBA, we compared the success, safety, and procedure characteristics in consecutive patients referred for a frs...
Multielectrode mapping for premature ventricular contraction ablation: a prospe...
Sousa, Pedro A.; Barra, Sérgio; Cortez-Dias, Nuno; Khoueiry, Ziad; Paulo, José; António, Natália; Ferreira, Afonso Nunes; Pereira, MarianaPurpose: We aim to evaluate whether the use of a multielectrode mapping catheter could lead to higher efficacy of premature ventricular contraction (PVC) ablation. Methods: Prospective, multicenter nonrandomized study of consecutive patients referred for PVC ablation from January 2018 to June 2021. Patients were separated into two groups: activation map performed with the PentaRay catheter (Study group) or with...
Association between the number of altered late potential criteria and increased...
Brito, Joana; Cortez-Dias, Nuno; Lima Da Silva, Gustavo; Ferreira, Afonso Nunes; Aguiar-Ricardo, Inês; Cunha, Nelson; António, Pedro SilvérioBackground: Brugada syndrome (BrS) is associated with abnormal electrophysiological properties at right ventricular epicardium, consisting of fragmented electrograms extending well beyond QRS termination. We aimed to evaluate the utility of signal-averaged electrocardiogram (SA-ECG) for the noninvasive assessment of late potentials (LP) and risk stratification of BrS patients. Methods: A prospective, observatio...
New technique for preserving cephalic vein flow in pacemaker implantation ipsil...
Carrington, Mafalda; António, Pedro Silvério; Rodrigues, Natacha; Ferreira, Afonso Nunes; Bernardes, Ana; Pinto, Fausto J.; De Sousa, JoãoVascular patrimony is a major concern in patients with end-stage renal disease. As patients on chronic hemodialysis programs experience increasing survival rates, they frequently face multiple vascular access failures and may need recurrent central venous catheter insertions and fistula/grafts reinterventions to optimize their arteriovenous accesses. In addition, heart failure and heart rhythm disorders are fre...
Impact of different activation wavefronts on ischemic myocardial scar electroph...
Lima Da Silva, Gustavo; Cortez-Dias, Nuno; Ferreira, Afonso Nunes; Nakar, Elad; Francisco, Raquel; Pereira, Mariana; Moreno, Javier; Martins, Raphaël P.Introduction: Scar-related ventricular tachycardia (VT) usually results from an underlying reentrant circuit facilitated by anatomical and functional barriers. The later are sensitive to the direction of ventricular activation wavefronts. We aim to evaluate the impact of different ventricular activation wavefronts on the functional electrophysiological properties of myocardial tissue. Methods: Patients with isc...
Novel “late potential map” algorithm: abnormal potentials and scar channels det...
Cortez-Dias, Nuno; Lima Da Silva, Gustavo; Ferreira, Afonso Nunes; Nakar, Elad; Francisco, Raquel; Pereira, Mariana; Carpinteiro, Luís; Pinto, Fausto J.Background: Automated systems for substrate mapping in the context of ventricular tachycardia (VT) ablation may annotate far-field rather than near-field signals, rendering the resulting maps hard to interpret. Additionally, quantitative assessment of local conduction velocity (LCV) remains an unmet need in clinical practice. We evaluate whether a new late potential map (LPM) algorithm can provide an automatic ...
Anticoagulation after typical atrial flutter ablation: systematic review and me...
Ferreira, Afonso Nunes; Alves, Mariana; Lima Da Silva, Gustavo; Cortez-Dias, Nuno; De Sousa, João; Pinto, Fausto J.; Caldeira, DanielBackground: Cavotricuspid isthmus (CTI) ablation in typical atrial flutter (AFL) restores sinus rhythm in 95% of patients, which may lead to the discontinuation of oral anticoagulation during follow-up. Therefore, we aimed to systematically review the clinical impact of oral anticoagulation in the incidence of thromboembolic events (TE) after typical AFL ablation. Methods: We searched for controlled studies eva...
Clinical impact of MultiPoint pacing in responders to cardiac resynchronization...
Marques, Pedro; Nunes-Ferreira, Afonso; António, Pedro; Aguiar-Ricardo, Inês; Rodrigues, Tiago; Badie, Nima; Marcos, Ivo; Bernardes, AnaBackground: Cardiac resynchronization therapy demonstrated benefits in heart failure. However, only 60-70% are responders and only 22% are super-responders. MultiPoint pacing (MPP) improves structural remodeling, but data in responder patients is scarce. Methods: A prospective, randomized study of the efficacy of MPP was conducted in patients who were CRT responders after 6 months of bi-ventricular (BiV) therap...
Anticoagulation after typical atrial flutter ablation: systematic review and me...
Ferreira, Afonso Nunes; Alves, Mariana; Lima Da Silva, Gustavo; Cortez-Dias, Nuno; De Sousa, João; Pinto, Fausto J.; Caldeira, DanielBackground: Cavotricuspid isthmus (CTI) ablation in typical atrial flutter (AFL) restores sinus rhythm in 95% of patients, which may lead to the discontinuation of oral anticoagulation during follow-up. Therefore, we aimed to systematically review the clinical impact of oral anticoagulation in the incidence of thromboembolic events (TE) after typical AFL ablation. Methods: We searched for controlled studies eva...