We report a case in which fracture of an Amplatzer perimembranous ventricular septal defect (VSD) device occurred within 1 month after placement. This was associated with severe tricuspid regurgitation. Surgical removal of the device and repair of the tricuspid valve was performed with reasonable outcome. We propose a hypothesis on how this complication might have occurred and how it could be p...

Recently, progress has been made in the development of mechanical joints with variable intrinsic stiffness, opening up the search for application areas of such variable-stiffness joints. By varying the stiffness of its joints, the resonant frequency of a system can be tuned to perform cyclical tasks most energy-efficiently, making the variable-stiffness joint a candidate element for an advanced...

Nit-Occlud Le VSD coil, an alternative device for closing transcatheter, started to be used in dr. Soetomo Hosptal 2017, but no research has been done on the results of closure with this device. This study aims evaluate efficacy and safety coil. Descriptive observational method was used. The are as follow: Of 17 patients who underwent transcatheter during January December 2018, 10 (58, 8%) case...

Industrial motor-driven equipment accounts for more than two-thirds of industrial energy consumption, making their efficient electrical operation a vital component in factory expenses. The replacement of traditional drives with variable speed drives (VSD) in motor-driven systems provides significant efficiencies that can translate to up to 40% in energy savings. Altera’s FPGA architectures prov...

Series elastic actuators (SEAs) and variable (VSAs) provide shock resistance, energy storage, stable force control. However, they usually require extra springs, mechanical parts, transmissions, increasing size, weight, number of moving reducing the efficiency. In particular, this complexity is one significant challenges in design wearable scalable feedback devices. article, flexure stiffness (F...

We read with great interest the article ‘‘Percutaneous closure of a post-traumatic ventricular septal defect with a patent ductus arteriosus occluder’’ written by Xi EP et al. (1). The authors aimed to report their experiences with three patients who underwent the percutaneous closure of a posttraumatic ventricular septal defect (VSD) with a patent ductus arteriosus (PDA) occluder. They conclud...

One of the most feared complications of transcatheter closure of a perimembranous ventricular septal defect (VSD) by the Amplatzer membranous occluder is atrioventricular (AV) block, occurring in 3% to 20% of cases [1, 2]. Atrioventricular block may occur immediately due to squeezing effects of disks or late due to device-induced inflammation and fibrous tissue formation [3]. We herein describe...

In this paper, a procedure has been presented to develop fragility curves of structures equipped with optimal variable damping or stiffness semi-active tuned mass dampers (SATMDs). To determine proper variable damping or stiffness of semi-active devices in each time step, instantaneous optimal control algorithm with clipped control concept has been used. Optimal SATMDs have been designed based ...

We present a series of 4 patients in whom a ventricular septal defect (VSD) was closed with an Amplatzer muscular VSD device during cardiac catheterization. In one patient with type I truncus arteriosus and subarterial VSD, closure of a wide apical defect was done to allow further surgical correction while avoiding left ventricular ventriculotomy. The second patient had congenitally corrected t...