Interatrial conduction times in paroxysmal atrial fibrillation patients with normal atrial volume and their correlation with areas of local prolonged bipolar electrograms. | LitMetric
Background: Recent evidence has shown that the presence of abnormal substrate can be demonstrated also among patients with "lone" AF.
Objectives: Interatrial conduction slowing is likely to characterize patients with paroxysmal atrial fibrillation (AF) and it could be correlated to the left atrium area of prolonged local bipolar endocardial electrograms.
Methods: P-wave duration (PWD), amplified PWD and endocavitary interatrial conduction time (IACT), were analyzed in 60 patients; 30 undergoing de novo ablation for paroxysmal AF with normal atrial volumes and without any other cardiac disease and 30 of similar age undergoing electrophysiological study for atrioventricular nodal reentrant tachycardia or atrioventricular re- entrant tachycardia. In patients with AF, voltage maps and local bipolar electrograms (LBE) duration map were evaluated.
Results: Although PWD was <120 ms in 28 patients with AF and in 29 controls, patients with AF exhibited longer PWD, amplified-PWD and IACT. Although low-voltage areas (<0.5 mV) were not found in the study population, 28 of them demonstrated areas with LBE longer than 60 ms. These LBE were found mainly in the roof of the left atrium and their extension was correlated to IACT (R = 0.51, p = 0.004). IACT >135.5 ms identified the subjects who experienced AF with 90% sensitivity and 97% specificity.
Conclusion: A subclinical interatrial conduction disturbance is demonstrable in subjects with paroxysmal AF and normal left atrial volume. IACT has a good correlation to the areas of abnormal LBE in the left atrium. IACT >135 ms identified subjects who have experienced AF.
Background: Morphological and functional cardiac involvement is rarely described in patients with inflammatory bowel disease (IBD) but there is evidence that they have an increased risk of cardiovascular (CV) events despite the lower prevalence of traditional CV risk factors.
Objectives: Our systematic review and meta-analysis examined the relationship between IBD and cardiac function, namely the incidence of heart failure (HF) and subclinical echocardiographic changes.
Data Sources And Methods: Two medical databases, PubMed and Scopus, were systematically searched up to September 2022 to identify all studies reporting HF and/or echocardiographic changes in IBD patients.
Background: The epicardial connections (ECs) via intercaval fibres connecting the right-sided pulmonary veins (PVs) and right atrium (RA) can preclude isolation of the right-sided PVs. Such ECs occasionally have a unidirectional conduction property.
Case Summary: A 62-year-old man was referred to our institution for catheter ablation of paroxysmal atrial fibrillation (PAF).
Objectives: Atrial fibrillation is common complication after heart surgery potentially leading to chronic atrial fibrillation, heart failure, and mortality. The aim of this study was to explore the relationship between preoperative interatrial block and the occurrence of postoperative atrial fibrillation.
Methods: Perioperative 12-channel ECGs of patients in sinus rhythm, scheduled for heart surgery including bypass and/or valve surgery were analysed.
Unlabelled: was to develop and clinically test a hardware and software system capable of identifying the predictors of the hidden forms of atrial fibrillation (AF) using 12-lead ECG data in sinus rhythm.
Materials And Methods: There was developed the hardware and software system "Intecard 8.1" to assess a set of markers for atrial electrical instability by 3-5-minute ECG recordings in sinus rhythm.
