RESUMO
Sustained ventricular tachycardia (VT) is an important cause of morbidity and sudden death in patients with dilated cardiomyopathy. Although ICD effectively terminate VT episodes and improve survival, shocks reduce quality of life, and episodes of VT predict increased risk of heart failure and death despite effective therapy. Patients suffering recurrent VT episodes remain a challenge. Antiarrhytmic therapy reduces VT episodes, but it is associated with serious adverse events, and disappointing efficacy. Catheter ablation has emerged as an important option to control recurrent VT, but major procedure-related complications, and even death, are still issues to concern. And even with these armamentaria, some patients still have recurrent VT episodes and ICD shocks. We report on a patient with non-ischemic dilated cardiomyopathy and recurrent ventricular tachycardia resistant to multiple antiarrhytmic agents, in whom dronedarone was effective in completely suppressing ventricular tachycardia episodes.
RESUMO
BACKGROUND: PV electrical isolation has become the cornerstone of catheter ablation for the treatment of atrial fibrillation (AF). Several strategies have been proposed to achieve this goal. The aim of this study was to assess the efficacy and safety of AF ablation using a new circular irrigated multielectrode ablation catheter designed to achieve single-delivery pulmonary vein (PV) isolation. METHODS: Thirty-five patients with drug refractory paroxysmal AF and normal ejection fraction from two centers were prospectively enrolled in this study. All patients underwent PV isolation with an nMARQ circular irrigated multielectrode ablation catheter guided by an electroanatomic mapping system. Magnetic resonance imaging was performed to exclude PV stenosis. RESULTS: PV isolation was achieved in 138 of 140 (98.57%) targeted veins. The mean procedure time was 79.5 min (SD 39.3 min). During a mean follow up of 16.8±2.8 months, 27 of 35 (77.2%) patients were free of AF. No PV narrowing was observed. One case of pericardial effusion due to perforation of the left atrial free wall during catheter manipulation did occur. CONCLUSIONS: PV isolation with a circular irrigated multielectrode ablation catheter is a feasible technique with a high acute success rate. The majority of patients remained asymptomatic during the midterm follow-up period. PV stenosis was not detected. While only a single serious adverse event occurred, this technique׳s safety profile should be tested in larger studies.
RESUMO
Long life expectancy and wide development of therapies have increased the number of patients under artificial treatment for lost kidney function or dialysis. Different options for vascular access are suitable for receiving this therapy. The use of tunneled catheters has consequently increased complications related to its use. A difficult retrieval of catheters caused by a hard fibrin sheath along its trajectory is a common drawback. Herein, we report a woman with suspicion of hemodialysis catheter infection and an irretrievable Tesio catheter. A novel technique using a Fogarty arterial catheter allowed a successful retrieval and avoided an aggressive management.
Assuntos
Cateteres de Demora , Remoção de Dispositivo , Veias Jugulares/cirurgia , Diálise Renal/instrumentação , Feminino , Humanos , Pessoa de Meia-IdadeAssuntos
Displasia Arritmogênica Ventricular Direita/terapia , Terapia de Ressincronização Cardíaca/estatística & dados numéricos , Taquicardia Ventricular/terapia , Adulto , Displasia Arritmogênica Ventricular Direita/complicações , Displasia Arritmogênica Ventricular Direita/fisiopatologia , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Taquicardia Ventricular/complicações , Taquicardia Ventricular/fisiopatologiaRESUMO
Isolated noncompaction of left ventricular myocardium (IVNC) is categorized as an unclassified cardiomyopathy by the World Health Organization. We describe the case of a 29-year-old woman who was diagnosed with IVNC after suffering two syncopes caused by an atrioventricular nodal reentrant tachycardia (AVNRT) that was successfully ablated. We report successful radiofrequency ablation in an adult with this cardiomyopathy. Although the presence of syncope in these patients obliged us to rule out a ventricular tachycardia as the most probable etiology, our case shows how an exhaustive study is needed to look for other possible and curable causes.