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Computed Tomography Angiography clinical trials

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NCT ID: NCT06414551 Not yet recruiting - Clinical trials for Chronic Total Occlusion of Coronary Artery

Calcification on CTCA of a CTO and PCI Outcomes

Start date: July 1, 2024
Phase:
Study type: Observational

A chronic total occlusion (CTO) is present in 15-20% of patients who are referred for invasive coronary angiography. CTO Percutaneous Coronary Intervention (PCI) procedure success rates have increased over the years and can be as high as 90% when performed by high-volume CTO operators.Procedurally, excess calcification in the CTO anatomy is one factor which makes it difficult to complete the procedure or obtain ideal stent expansion. Excess calcification is best identified by Computed Tomography Coronary Angiography (CTCA) rather than invasive angiography. The investigators plan to retrospectively evaluate CTCA in patients who underwent CTO PCI and correlate calcification characteristics with CTO PCI outcomes and tools utilised for calcium modification.

NCT ID: NCT05729490 Recruiting - Clinical trials for Coronary Artery Disease

Techniques and Pitfalls of Multi-Slice CT Coronary Angiography

Start date: January 1, 2023
Phase: N/A
Study type: Interventional

The goal of this study is to describe the techniques for coronary multi-slice CT angiography and to illustrate the spectrum of artifacts that can simulate coronary artery stenosis and lead to non-assessable segments using 128- and 160 multi-detector row CT scanners and discuss post-processing pitfalls with each. In addition, to review the normal anatomy and anatomic variants of the coronary arteries and discuss effective strategies for improving the diagnostic accuracy of coronary CT angiography.

NCT ID: NCT04636099 Recruiting - Gastrostomy Clinical Trials

Gastrointestinal Surgery Study Group 2001

GISSG2001
Start date: November 1, 2020
Phase: N/A
Study type: Interventional

Gastric cancer is one of the most common malignace worldwide, which caused a dramatically death rate, especially in east Asian, such as Japan , South Korea and China. Although the treatment of gastric cancer has a large improvement, such as radiotherapy, chemotherapy and immunotherapy, surgery is yet the mainstream method for the curable malignace without distant metastasis. As the innovation of treatment in gastric caner, laprascopic has gain its popularity owing to its equivalent oncologic outcomes, earlier oral feeding, shorten postopertative of hospital length,compared with open surgery. Depite it has several advantages, the defect of laparascopic surgery is still obvious, such as 2D surgical field, lack of inverse haptic feedback, Inflexible equipment. D2 Lymph node dissection associated with laparascopic gastronomy is still regard as standard surgical procedure for the gastric cancer patient whose tumor stage was evaluated in advance stage. As we known that the distribution of lymph nod is accompanied with blood vessels, even for well-trained surgeon, the procedure lymph node dissection is a challenging and tough work. Computed Tomography Angiography(3D-CTA), as a emerging technology, is gradually receive the surgeon's attention for its remedy characteristic to the defect of laparascopic surgery, which can visually display the distribution and type of perigastric artery, resulting in decresing the difficulty and risk of surgery. The aim of the study is to investigate the clinincal outcomes for the patient with BMI ≥25 kg/㎡who underwent laparascopic or robotic gastronomy using CTA to evaluate the type of perigastric artery.

NCT ID: NCT04491513 Completed - Clinical trials for Coronary Artery Disease

Detection of Proximal Coronary Artery Disease in the Work-up for Transcatheter Aortic Valve Implantation Using CTA (From the DEPICT CTA Database)

DEPICT CTA
Start date: October 1, 2019
Phase:
Study type: Observational

Background: Computed tomography angiography (CTA) is already used in the work-up for transcatheter aortic valve implantation (TAVI) and could partially replace invasive coronary angiography (CAG) to rule out proximal coronary lesions. Objectives: To assess the diagnostic accuracy and yield of pre-TAVI CTA to detect coronary lesions (≥50% DS and ≥70% DS) in the proximal coronary segments on a per-patient and a per-segment level. Methods: The DEPICT CTA database consists of individual patient data of four studies that analysed the diagnostic accuracy of pre-TAVI CTA to detect coronary lesions. For this analysis, diagnostic accuracy was assessed in the left main and the three proximal coronary segments.