Search results for "Catheter"

Relative incidence and mortality of congenital heart defects diagnosed by angiohemodynamic methods: a 17-year study.

1992

Over a 17-year period (January 1971 to January 1988), 2322 children, aged 0-14 years, were diagnosed as having congenital heart disease (CHD) by cardiac catheterization and angiography. Excluding those with highly complex or undiagnosed defects, there were 2156 children with CHD, 72.4% of whom were treated surgically, with a total surgical mortality rate of 24.1%. After a mean follow-up of 9 years the overall mortality of the cohort was 29.9%, 29.1% occurring in the first month of life, 39.6% between 1 month and 1 year, and 31.2% between 1 and 14 years. The incidence, mortality, and age at death of each cardiac defect are presented and compared with the results of other studies. The overall…

Aortic stenosis: insights on pathogenesis and clinical implications

2016

Aortic stenosis (AS) is a common valvular heart disease in the Western populations, with an estimated overall prevalence of 3% in adults over 75 years. To understand its patho-biological processes represents a priority. In elderly patients, AS usually involves trileaflet valves and is referred to as degenerative calcific processes. Scientific evidence suggests the involvement of an active "atherosclerosis-like" pathogenesis in the initiation phase of degenerative AS. To the contrary, the progression could be driven by different forces (such as mechanical stress, genetic factors and interaction between inflammation and calcification). The improved understanding presents potentially new thera…

Proceedings from the European clinical consensus conference for renal denervation: considerations on future clinical trial design: Figure 1

2015

Approximately 8–18% of all patients with high blood pressure (BP) are apparently resistant to drug treatment.1,2 In this situation, new strategies to help reduce BP are urgently needed but the complex pathophysiology of resistant hypertension makes this search difficult. Not surprisingly in this context, the latest non-drug treatment which triggered controversy is catheter-based renal denervation (RDN).3,4 The method uses radiofrequency energy, or alternatively ultrasound or chemical denervation, to disrupt renal nerves within the renal artery wall, thereby reducing sympathetic efferent and sensory afferent signalling to and from the kidneys.5,6 Various experimental models of hypertension s…

3D and multispectral imaging for subcutaneous veins detection.

2009

The first and perhaps most important phase of a surgical procedure is the insertion of an intravenous (IV) catheter. Currently, this is performed manually by trained personnel. In some visions of future operating rooms, however, this process is to be replaced by an automated system. Experiments to determine the best NIR wavelengths to optimize vein contrast for physiological differences such as skin tone and/or the presence of hair on the arm or wrist surface are presented. For illumination our system is composed of a mercury arc lamp coupled to a 10nm band-pass spectrometer. A structured lighting system is also coupled to our multispectral system in order to provide 3D information of the p…

Transcatheter aortic valve implantation in 2015

2016

Not available

Aortic valve stenosis: Treatments options in elderly high-risk patients

2016

Not available

Assisting Electrophysiological Substrate Quantification in Atrial Fibrillation Ablation

2019

[EN] Catheter ablation (CA) is the most popular treatment of atrial fibrillation (AF) with good results in paroxysmal AF, while its efficiency is significantly reduced in persistent AF. With the equipment used for CA strongly depending on electro-gram (EGM) fractionation quantification, the use of a reliable fractionation estimator is crucial to reduce the high recurrence rates in persistent AF. This work introduces a non-linear EGM fractionation quantification technique, which is based on coarse-grained correlation dimension (CGCD) computed over epochs of 1 second. Recordings were firstly normalized, denoised and lowpass filtered. The final CGCD value was calculated by the median CGCD valu…

Direct image-guided retroperitoneal approach and treatment of the pancreas by using natural orifice transluminal endoscopic surgery after EUS sugar-a…

2021

Endoscopic interventions in the small bowel using double balloon enteroscopy: feasibility and limitations.

2007

Double-balloon enteroscopy (DBE) is a new endoscopic tool that not only allows diagnostic workup of small bowel diseases, but also makes it possible to carry out therapeutic interventions. However, for a variety of reasons, endoscopic therapy appears to be more difficult to carry out deep in the small bowel than in the upper or lower gastrointestinal tract.The purpose of this study was to evaluate the acute technical success and acute complication rate of DBE.Between June 2003 and July 2006, 353 patients (152 women, 201 men; mean age 60.3 +/- 17.1 yr) with suspected or known small bowel disease underwent 635 consecutive DBE procedures. The majority of the patients were suffering from midgas…

Balloon Enteroscopy: Single- and Double-Balloon Enteroscopy

2009

Balloon enteroscopy is a method that allows endoscopic inspection of the entire small bowel, or large parts of it, while simultaneously making it possible to obtain histologic samples and carry out treatment measures. Studies of double-balloon enteroscopy (DBE) have confirmed the high diagnostic yield of the procedure, with an acceptably low complication rate (approximately 1% for diagnostic DBE and 3% to 4% for therapeutic DBE). The principal indication for the procedure is midgastrointestinal bleeding, that is, when the bleeding source is located in the small bowel. With good patient selection, the diagnostic yield here is 70% to 80%, and this has a substantial influence on subsequent tre…