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The ULTRASEAL LAA device, from Cardia, is a percutaneous, transcatheter device intended to prevent thrombus embolization from the left atrial appendage in patients who have non-valvular atrial fibrillation. As with all Cardia devices (such as: Atrial Septal Defect Closure Device or Patent Foramen Ovale Closure Device), the Ultraseal is fully ...
Such a score is used to determine whether or not treatment is required with anticoagulation therapy or antiplatelet therapy, [1] since AF can cause stasis of blood in the upper heart chambers, leading to the formation of a mural thrombus that can dislodge into the blood flow, reach the brain, cut off supply to the brain, and cause a stroke.
Left ventricular thrombus is a blood clot in the left ventricle of the heart. LVT is a common complication of acute myocardial infarction (AMI). [ 1 ] [ 2 ] Typically the clot is a mural thrombus, meaning it is on the wall of the ventricle. [ 3 ]
The thrombus generally forms in the left atrium, most commonly the left auricle. The formation is thought to be primarily due to blood flow stasis. Classically, the thromboembolism lodges at the iliac trifurcation of the aorta, occluding either one or both of the common iliac arteries.
Is can also be analyzed through other methods such as intravascular ultrasound, and magnetic resonance imaging. [10] Using these diagnostic methods, it has been discovered that the disease normally occurs most often in the right coronary artery, followed by the left anterior descending artery, and finally the left anterior circumflex artery. [11]
A thrombus may become detached and enter circulation as an embolus, finally lodging in and completely obstructing a blood vessel, which unless treated very quickly will lead to tissue necrosis (an infarction) in the area past the occlusion. Venous thrombosis can lead to pulmonary embolism when the migrated embolus becomes lodged in the lung.
Individuals with arterial thrombosis or embolism often develop collateral circulation to compensate for the loss of arterial flow. However, it takes time for sufficient collateral circulation to develop, [ 1 ] making affected areas more vulnerable for sudden occlusion by embolisation than for e.g. gradual occlusion as in atherosclerosis .
The former would show a delineated, round thrombus, whereas the latter would show narrowed arterial lumen with atherosclerotic plaque. [ 2 ] Although Doppler ultrasounds provide excellent information, there may be difficulty in evaluating aortic or iliac arteries in patients who are obese or have significant gas. [ 2 ]