Active clinical trials for "Coronary Stenosis"

The purpose of this post market study is to collect clinical data of the Arthesys PTCA NC catheters family during angioplasty intervention of coronary vessels or coronary bypass graft stenosis to support MDR submission.

This investigation is to see if the new Novasight Hybrid imaging catheter can safely and accurately provide two different types of images (IVUS and OCT) of the inside of heart vessels at the same time. The images will be compared against one type of image (IVUS) to see if providing two, improves identification of different types of plaque (fatty substances) and informs better treatment. Atherosclerotic coronary artery disease is the name given to the development of plaques in the heart vessels. The plaques can cause narrowing in the vessels which may cause chest pain. Sometimes, plaques completely block the vessels causing a heart attack. This type of disease is the main cause of death worldwide. Research shows that when the type of plaque causing problems is known, it can help understanding of which narrowing may get worse and cause a heart attack. This information can also help with deciding when and which treatment to provide. Intravascular imaging is a way to assess the inside of the heart arteries. It involves passing a narrow catheter into the heart vessels. The catheter has a probe on its tip that emits light or an ultrasound signal. The signal is reflected by the vessel wall, back into the probe. A computer program interprets the signals and creates images of the inside of the arteries. There are two types of imaging catheters. One uses sound (Intravascular Ultrasound (IVUS)) and one uses light ((OCT) Optical Coherence Tomography) to produce different types of pictures of the vessels and plaques. The images produced by each type do not provide a full picture of the plaques on their own. A new hybrid imaging catheter has been developed which has two probes at the tip, an IVUS probe and an OCT probe and can produce both types of images at the same time. It is likely that having both types of images is better for finding high-risk plaques and should lead to better, more specific treatment. 50 heart attack patients who need an angiogram will have images of their vessels taken during their treatment. Once the imaging is complete the patient will continue with their routine planned care. The information from the images will be used to see how safe and accurate this new hybrid catheter is compared with the separate IVUS and OCT catheters, and also check to see if it is easier to identify plaques that might cause future problems. The study also aims to develop new ways to process and use the images from the hybrid catheter to better treat the plaques that cause the heart attack.

This trial uses prospective, retrospective, observational, non-blinded, multi-center, single-arm, post-marketing hospital data collection and research methods. The goal of this study is to assess the safety of BIOTRONIK Orsiro Sirolimus-Eluting Coronary Stent System in the Chinese patient population after marketing in China.

The purpose of this study is to evaluate the prognosis of coronary stenosis based on intracoronary Imaging.

The purpose of this study is to determine whether exercise testing can detect an obstruction in a coronary artery, and, thereby, can avoid performing a coronary imaging in some cases. Patients with a suspicion of coronary artery disease perform an exercise test on an exercise bike with increasing load. EKG, blood pressure, and other parameters are monitored. Patients benefit also of either a cardiac CT scan or a coronary angiography to establish whether they really have coronary obstruction.

To perform CT-QFR, invasive coronary angiography, FFR, and QFR tests on patients with moderate coronary stenosis after coronary CTA examination. Use FFR as a reference to verify the diagnostic performance of CT-QFR, and compare it with QFR.

The expected outcome of better and improved patency of bypass grafts and its direct relation to pre-operative iFR measurements of stenosis as compared to direct visual physiology of stenosis in the coronary angiogram. To establish the correlation between the use of intracoronary physiology and improved graft patency at 12 months for patients undergoing CABG surgery. It is a minimum of 28 and a maximum of 100 patients single-centre proof or concept/ observational study/ pilot study.

ULTRA is a multicenter, observational, retrospective registry, enrolling consecutive patients treated with ultrathin coronary DES (coronary stent with strut thickness < 70 um) for coronary bifurcation lesions, left main disease, chronic total coronary occlusion, and in-stent restenosis regardless of their clinical presentation. Target lesion failure (TLF a composite endpoint of cardiovascular death, target vessel myocardial infarction, target lesion revascularization and definite stent thrombosis) will be the primary end point, while its single components will be the secondary ones along with all-cause death, all acute myocardial infarction (excluding peri-procedural AMI), target vessel revascularization and BARC major bleedings (BARC 3-5). Due to the retrospective, observational nature of the registry, no formal sample size estimation is required. Patients complying with detailed inclusion criteria and with a minimum follow up of 6 months will be enrolled.

This study evaluates long-term outcome of patients diagnosed as acute myocardial infarction and treated with medication, coronary artery bypass surgery and percutaneous coronary intervention in Asan medical center, Korea.

The aim of this Heidelberg Cardiac CT Registry (Register kardiale Computertomographie) is to assess the diagnostic and prognostic perfomance of cardiac CT exminations in a real-world patient population.