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Chest imaging
Published in Sarah McWilliams, Practical Radiological Anatomy, 2011
o Azygo-oesophageal line: created by the right lung abut-ting the azygos vein and oesophagus. Posterior medi-astinal lymphadenopathy can be detected by a change in contour of this stripe. This usually has a concave or straight shape as it ascends cranially to the right. A bulge or convexity in the contour would imply pathology/ lymphadenopathy, left atrial enlargement (Fig. 3.26b).
Network modeling and Internet of things for smart and connected health systems—a case study for smart heart health monitoring and management
Published in IISE Transactions on Healthcare Systems Engineering, 2020
Hui Yang, Chen Kan, Alexander Krall, Daniel Finke
ECG segments: Note that cardiac diseases alter the patterns of ECG signals and cause the morphology variations that are reflected in various ECG segments; e.g., P, QRS, T waves (Elmberg et al., 2016; Meo et al., 2013; Perlman et al., 2016). For example, pulmonary hypertension will result in the right atrial enlargement, which is reflected as enlarged P waves. Abnormities in ventricular conductions (e.g., myocardial infarctions) will mainly lead to morphological variations in QRS and T waves. The lengths of P, QRS, T segments are often variable, and the period of ventricular contraction is the longest for most cases. Those segments with smaller lengths pose bigger challenges for change detection. Hence, we will test the proposed network monitoring methods for various ECG segments.
The role of transcatheter mitral valve leaflet approximation for the treatment of secondary mitral regurgitation: current status and future prospects
Published in Expert Review of Medical Devices, 2021
Noé Corpataux, Nicolas Brugger, Lukas Hunziker, David Reineke, Stephan Windecker, Alec Vahanian, Fabien Praz
‘Atrial’ SMR has been proposed as a distinct entity related to isolated left atrial enlargement in patients with atrial fibrillation [26,27]. The exact proportion of patients of this particular population is not well established. In a retrospective cohort study, significant atrial SMR was present in 54 of 770 (7%) patients [2] undergoing a first atrial fibrillation ablation procedure. Similarly, Kim et al. reported a prevalence of 4.3% of atrial MR among 1ʹ247 patients with persistent atrial fibrillation [28]. Although no study specifically investigated this topic to date, restoration of sinus rhythm to prevent or correct left atrial dilatation may be an important therapeutic aspect to address atrial SMR.
Pacing devices to treat bradycardia: current status and future perspectives
Published in Expert Review of Medical Devices, 2021
Mauro Biffi, Claudio Capobianco, Alberto Spadotto, Lorenzo Bartoli, Sergio Sorrentino, Alessandro Minguzzi, Giuseppe Pio Piemontese, Andrea Angeletti, Sebastiano Toniolo, Giovanni Statuto
AF is highly prevalent both before and after pacemaker implantation, almost 50% of SND patients [7]. In this population, it was observed that diabetes, hypertension and left atrial enlargement are AF predictors, suggesting that they portend an underlying vulnerable atrial substrate [8]. Though AP prevents bradycardia-dependent tachy-arrhythmias, several patients experience new-onset AF [9]. The atrial stimulation site seems to impact on the risk of new-onset AF more than AP extent. High-septal atrial pacing near Bachmann’s bundle seems to prevent the negative effects of RAA pacing: proximity to Bachmann’s bundle minimizes interatrial and AV conduction delay (Figure 1) [10].