[Left Atrium Appendage Aneurysm Late After Suture Exclusion:Report of a Case].

Left atrial appendage closure is widely performed in cardiac surgery to prevent intracardiac thrombus in patients with atrial fibrillation. Herein, we report the surgical case of an 80-year-old man whose left atrial appendage became aneurysmic long after undergoing suture exclusion. At the age of 67, he underwent mitral valve annuloplasty and left atrial appendage suture exclusion for mitral regurgitation and chronic atrial fibrillation at our institution.

Exploring the Molecular-Scale Structures at Solid/Liquid Interfaces of Li-Ion Battery Materials: A Force Spectroscopy Analysis with Sparse Modeling.

In this study, we clarify the liquid structure formed at the interface between LiCoO (LCO), the cathode material of Li-ion batteries, and propylene carbonate (PC), which is used as a solvent in the electrolyte, on a molecular scale. We apply sparse modeling-based modal analysis to force spectroscopy data measured by frequency modulation atomic force microscopy (FM-AFM) and show that each component in the FM-AFM force curve, such as oscillatory solvation force, background, and noise, can be automatically decomposed. Moreover, by combining detailed force curve analysis with solid/liquid interface simulations based on first-principles calculation, we have identified that there are distinct damped vibrational modes in the force curves at the LCO/PC interface with a period of about 0.

[Mitral Valve Replacement for Eclipsed Mitral Regurgitation with Multiple Episodes of Acute Exacerbation and Remission].

Eclipsed mitral regurgitation is a relatively new disease concept reported in recent years, of which is not fully elucidated. A 73-year-old female had repeated episodes of heart failure of unknown cause. During cardiac catheterization and echocardiography performed, mitral regurgitation suddenly worsened and improved in a few minutes.

[Acute Aortic Dissection with Rapidly Enlarged Aneurysm after Methicillin-resistant Staphylococcus Aureus Bacteremia].

The patient is a 62-year-old man. He was referred to our hospital from a nearby clinic with a complaint of chest and back pain, and was urgently admitted with a diagnosis of Stanford type A (Debakey typeⅢbR) acute aortic dissection. During the course of his treatment, he developed a urinary tract infection caused by methicillin-resistant Staphylococcus aureus (MRSA).