3 results match your criteria: "Hospital Luz Lisboa[Affiliation]"
Successful ablation of premature ventricular contractions exclusively guided by epicardial and endocardial non-invasive mapping (ECGI) and confirmed by substrate mapping.
J Electrocardiol
June 2021
Hospital Luz Lisboa, Av Lusiada 1500-650, Lisboa, Portugal.
Article Synopsis
- Ablation of premature ventricular contractions (PVCs) typically requires detailed activation mapping, but this can be challenging if PVCs are absent during the procedure.
- An alternative method, pacemapping, has its drawbacks.
- In a case study, a patient with frequent PVCs had no PVCs on the procedure day, yet successful ablation was achieved using electrocardiographic imaging and substrate mapping.
Electrocardiographic imaging (ECGI): What is the minimal number of leads needed to obtain a good spatial resolution?
J Electrocardiol
June 2021
Hospital Luz Lisboa, Av Lusiada 1500-650, Lisboa, Portugal.
Article Synopsis
- The study aimed to find out the minimum number of ECGI leads necessary for achieving good spatial resolution in mapping arrhythmias during ablation procedures.
- Out of 20 patients, the highest agreement between ECGI and Carto mapping was when using 23 electrode bands (85% agree rate), while reducing to 6 electrode bands significantly decreased agreement to 55%.
- The findings suggest that while fewer leads lead to lower spatial resolution, approximately 74 leads are sufficient for acceptable quality mapping, indicating efficiency in lead usage can be achieved without compromising accuracy.
Non-invasive electrocardiographic imaging in patients with idiopathic premature ventricular contractions from the right ventricular outflow tract: New insights into arrhythmia substrate.
J Electrocardiol
June 2021
Hospital Luz Lisboa, Av Lusiada 1500-650, Lisboa, Portugal.
Article Synopsis
- The study used non-invasive electrocardiographic imaging (ECGI) to analyze the heart's electrical properties in patients with frequent premature ventricular contractions (PVCs) originating from the right ventricular outflow tract (RVOT) and control subjects.
- Results showed that patients with PVCs had significantly shorter recovery times (RT) in both endocardial and epicardial layers compared to controls, along with greater dispersion in activation recovery intervals (ARI) and RT on the epicardium.
- The findings suggest that the electrophysiological characteristics in individuals with frequent RVOT PVCs are distinct, potentially indicating underlying differences in heart function.