Endoscopically guided spectral-domain OCT with double-balloon catheters

Endoscopic ultrasound-guided antegrade dilation of a stenosed hepaticojejunostomy.

Endoscopic dilation of a strictured hepaticojejunostomy can be performed through an access or afferent loop using a balloon enteroscope or a pediatric colonoscope; however, these canbe cumbersomeprocedures. Alternatively, a percutaneous approach may be utilized, but is associated with significant morbidity because of the requirement for external drainage catheters. Recently, endoscopic ultrasou...

Endoscopically Guided Balloon Dilatation of Recurrent Choanal Stenosis

Retinal Ganglion Cell Complex in Alzheimer Disease: Comparing Ganglion Cell Complex and Central Macular Thickness in Alzheimer Disease and Healthy Subjects Using Spectral Domain-Optical Coherence Tomography

Introduction: Alzheimer disease (AD) is the most common form of dementia worldwide. The modalities to diagnose AD are generally expensive and limited. Both the central nervous system (CNS) and the retina are derived from the cranial neural crest; therefore, changes in retinal layers may reflect changes in the CNS tissue. Optical coherence tomography (OCT) machine can show delicate retinal layer...

Navigation for fluoroscopy-guided cryo-balloon ablation procedures of atrial fibrillation

Atrial fibrillation (AF), the most common arrhythmia, has been identified as a major cause of stroke. The current standard in interventional treatment of AF is the pulmonary vein isolation (PVI). PVI is guided by fluoroscopy or non-fluoroscopic electro-anatomic mapping systems (EAMS). Either classic point-to-point radio-frequency (RF) catheter ablation or so-called single-shot-devices like cryo...

OCT versus IVUS: accuracy versus clinical utility.

The technology of optical coherence tomography (OCT) has evolved from time-domain to frequencydomain imaging. Time-domain OCT is most often performed using proximal balloon occlusion; as such, dimensions are smaller than measured using intravascular ultrasound (IVUS), presumably due to diminished perfusion pressure. Conversely, frequency-domain OCT does not require proximal balloon occlusion, t...