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Background: Evidence indicates that radiofrequency catheter ablation (RFCA) of ventricular tachycardia (VT) in patients with structural heart disease (SHD) is safe and effective. However, arrhythmia recurrence is still relatively high, and the optimal procedural strategy is unclear. In clinical practice, several combinations of mapping and ablation techniques are used to improve VT ablation efficacy., Aim: The study aimed to evaluate and provide evidence on the efficiency and safety of a systematized combination of VT ablation (mapping) techniques in patients with SHD., Methods: From 2016 to 2019, 47 patients (54 procedures) with SHD (89% heart failure, 94% ischemic heart disease, 37% VT storm) who underwent RFCA of VT were retrospectively analyzed from a group of 58 consecutive patients. During RFCA of VT, different combinations of three techniques, activation mapping (AM), pace mapping (PM), and substrate-based mapping (SbM), were used. The procedures were performed using the CARTO® 3 (Biosense Webster Inc., Diamond Bar, CA, US) electro-anatomical mapping system., Results: During a median (interquartile range [IQR]) follow-up of 25.5 months (11.75-52.25), VT-free survival after ablation was 68.5% (n = 37/54 procedures). Acute procedural success was achieved in 85% (n = 46/54 procedures). The number of induced VT morphologies, induction of non-clinical or non-sustained VT after ablation, and fewer VT mapping techniques used during the procedure were related to decreasing VT-free survival., Conclusions: VT ablation strategy based on systemic use of combined techniques is effective and safe in long-term follow-up of patients with SHD.

Background: The number of dental patients requiring periodic or lifelong antiplatelet or anticoagulanttherapy is constantly growing., Aims: We aimed to determine the level of knowledge on antiplatelet and anticoagulant therapy among Polish dentists., Methods: self‑designed online questionnaire was distributed among dentists to evaluate their knowledge on the use of antiplatelet and anticoagulant drugs in clinical dental practice., Results: The study included 352 dentists. Patients requiring vitamin K antagonists were referred for a cardiac consultation by 64.52%, 57.29%, and 58.55% of dentists with <5, 5-15, and >15 years of experience,respectively (P = 0.003). A similar trend was observed for non-vitamin K antagonist oral anticoagulants among nonsurgical dentists. However, an equal percentage of surgical dentists (39.7%) performedextraction with and without consultation, and they were more likely to perform extraction withoutconsultation than nonsurgical dentists (39.7% vs 27.8%; P = 0.01). Most surgical and nonsurgical dentistspreferred to consult a cardiologist about dual antiplatelet therapy before an invasive procedure (56.9%and 73.81%, respectively; P = 0.03). Extractions in patients on aspirin were accepted by 75.81%, 70.83%, and 49.34% of dentists with <5, 5-15, and >15 years of experience, respectively (P = 0.004), and by 79.31%of surgical and 57.14% of nonsurgical dentists (P = 0.003)., Conclusions: Knowledge on antiplatelet and anticoagulant therapy in patients undergoing dental procedures is unsatisfactory among Polish dentists. Both therapies were discontinued before extractionsmore frequently than recommended in the guidelines, while extractions in patients on aspirin were common.