Clinical trials: Cerebral Microemboli
Carotid Stenosis
Platelet Inhibition and Transcranial Doppler (TCD)-Detected Microemboli During and After Carotid Artery Stenting (CAS) in Asymptomatic Patients Prior to Cardiac Surgery
As with coronary artery stenting, activation and embolisation of platelets occurs with carotid artery stenting (CAS). Based on promising data on the use of clopidogrel plus aspirin in coronary stenting this dual antiplatelet…
- Trial name
- IMPACT (NCT01146301)
- Testing
- Clopidogrel
- Where
- Netherlands
- Sponsor
- R&D Cardiologie
Stroke
Reproducibility Study of Transcranial Doppler
Hardening of the neck vessels (carotid arteries) caused by fatty deposits called 'plaques' is a common cause of strokes. Over time plaques can burst or may lead to a severe narrowing (stenosis) of the neck artery.
- Trial name
- NCT03050567
- Testing
- Transcranial Doppler Ultrasound
- Where
- United Kingdom
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- University of Edinburgh
Cardiovascular Disease, Mitral Valve Repair
Carbon Dioxide Insufflation on Cerebral Microemboli
The purpose of this study is to determine if blowing carbon dioxide into the surgical field during open-heart surgery to displace retained chest cavity air from the atmosphere will decrease the number of microembolic being…
- Conditions
- Cardiovascular Disease, Mitral Valve Repair, Cerebral Microemboli, Cognitive Decline
- Trial name
- NCT00715845
- Testing
- Carbon dioxide insufflation
- Where
- Canada
- Volunteers
- 20 people
- Sponsor
- University Health Network, Toronto
Carotid Artery Stenosis
Predictive Value for Stroke
Patients with a moderate to severe carotid atherosclerotic plaque are at risk for stroke and this risk increases with increasing degree of stenosis.
- Trial name
- NCT00451529
- Where
- Netherlands
- Volunteers
- 200 people
- Sponsor
- Dutch Heart Foundation
Microemboli, Stroke
A Multicenter Study to Optimize Microembolic Signal Classification Based on Double--Blind Multiparametric Assessment by Human Experts Using an Universal Graphical Interface [MESOMEGA]
Microembolic signals (MES) is a powerful predictor of future embolic events. This study aims to develop and validate a accurate model of classification of MES obtained by transcranial Doppler.
- Conditions
- Microemboli, Stroke, Transcranial Doppler Ultrasound
- Trial name
- MESOMEGA (NCT07172165)
- Testing
- Expert double-blind evaluation
- Where
- Portugal
- Volunteers
- 850 people
- Sponsor
- Universidade do Porto
Carotid Endarterectomy, Percutaneous Transluminal Angioplasty
Study of Blood Flow Changes and Microemboli During Carotid Surgery
The purpose of this study is to determine the clinical and radiologic implications of the intraoperative microemboli during carotid revascularization.
- Conditions
- Carotid Endarterectomy, Percutaneous Transluminal Angioplasty, Cognitive Aspects, Diffusion Weighted MRI
- Trial name
- NCT01343615
- Testing
- carotid stenting, carotid endarterectomy
- Where
- Brazil
- Volunteers
- 40 people
- Sponsor
- University of Campinas, Brazil
Cerebral Microemboli
Tissue Oxygen Index and Pulsatility Index in Orthopedic Surgery: a NIRS and TCD Pilot Trial
Cerebral microemboli (ME) are frequently generated during major orthopaedic surgery. The primary objective of this study was applying novel transcranial Doppler (TCD) ultrasound software algorithm to quantify (ME load/15 minutes)…
- Trial name
- NCT02340416
- Testing
- Transcranial Doppler Ultrasound, DWL Doppler BoxX
- Where
- Austria
- Volunteers
- 50 people
- Sponsor
- Medical University of Vienna
Brain Injury
Neuromonitoring in Patients During Aortic Valve Replacement
Postoperative brain damage and neuropsychological disorders have been observed in 30 - 80 % of patients after heart surgery with the use of cardiopulmonary bypass (CPB).They can persist up to a year after cardiac surgery and are…
- Trial name
- IMLPBIAVR (NCT02697786)
- Testing
- Transcranial doppler
- Where
- Slovenia
- Volunteers
- 60 people
- Sponsor
- Marija Bozhinovska
Carotid Artery Stenosis
Neuroimaging Correlates of Memory Decline Following Carotid Interventions
Carotid revascularization can significantly reduce the risk of stroke in patients with severe carotid stenosis; however, it has been associated with cognitive decline in 25% of the older adults who undergo the procedure.
- Trial name
- NCT02006095
- Testing
- Magnetic resonance imaging, Neuropsychological testing
- Where
- United States
- Volunteers
- 207 people, healthy volunteers welcome
- Sponsor
- Stanford University
Thoracic Aortic Aneurysm, Thoracic Aortic Dissection
Cerebral Hemodynamics and Microemboli During Placement of Relay®Branch Thoracic Stent-Graft System
This is an observational cohort study addressing the incidence of cerebral microemboli and alterations of cerebral hemodynamic physiology of the Relay®Branch thoracic stent-graft system.
- Conditions
- Thoracic Aortic Aneurysm, Thoracic Aortic Dissection, Microemboli
- Trial name
- CHaMP (NCT05155956)
- Testing
- transcranial Doppler ultrasonography (TCD)
- Where
- 2 sites in United States
- Volunteers
- 20 people
- Sponsor
- University of Pennsylvania
Complication of Extracorporeal Membrane Oxygenation, Cerebral Microembolism
Cerebral Microemboli in Venoarterial ECMO Patients
Extracorporeal membrane oxygenation (ECMO) is progressively used in critically ill patients with cardiac or respiratory failure as a bridging option for potential organ recovery.
- Conditions
- Complication of Extracorporeal Membrane Oxygenation, Cerebral Microembolism, Cerebral Perfusion
- Trial name
- NCT02020759
- Testing
- Transcranial Doppler Ultrasound
- Where
- Austria
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Ischemic Stroke, Embolic Stroke
Norwegian Microemboli in Acute Stroke Study
BACKGROUND: The cause of ischemic stroke remains undetermined in 30-40% of the cases, but circulating blood clots (thromboemboli) are a postulated common denominator in approx. 75% of patients.
- Conditions
- Ischemic Stroke, Embolic Stroke, Microemboli
- Trial name
- NOR-MASS (NCT03543319)
- Where
- Norway
- Volunteers
- 400 people, healthy volunteers welcome
- Sponsor
- Haukeland University Hospital
Intracranial Embolism and Thrombosis, Postoperative Complications
TCD Detection of Gas and Solid Micro-Emboli in Patients Undergoing Coronary Artery Bypass Grafting (CABG): The Influence of Proximal Anastomosis Technique
The purpose of this study is to test the hypothesis that using three different techniques to anastomose coronary grafts to the aorta: partial occlusion, single cross clamp, or using the Heartstring anastomotic device, will change…
- Trial name
- NCT00294814
- Testing
- Proximal anastomosis using Heartstring anastomotic device
- Where
- Israel
- Volunteers
- 100 people
- Sponsor
- Rambam Health Care Campus