Acute Coronary and Cerebral Emboli From a Pedunculated Ascending Aorta Thrombus.
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ABSTRACT:
SUBMITTER: Shoda M
PROVIDER: S-EPMC8353561 | biostudies-literature |
REPOSITORIES: biostudies-literature
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Project description:In the first case, a 60-year-old man was referred to our hospital for a sudden stomachache. A computed tomography scan revealed a thrombus at ascending aorta with acute mesenteric ischemia. In the second case, a 62-year old man developed a hypoglycemic attack with unbalanced diet. A computed tomography showed a thrombus at ascending aorta without thromboembolism. Laboratory data of both cases showed elevated platelet and a loss of antithrombin III. We administered a resection of thrombus to prevent a systemic embolism. We suggested that the risk of ascending aorta thrombus was elevated platelet and a loss of antithrombin III.
| S-EPMC7991702 | biostudies-literature
Project description:BackgroundLeft main coronary artery (LMCA)-acute coronary syndrome (ACS) is a rare complication of a floating thrombus in the ascending aorta. However, diagnosing the aetiology of LMCA-ACS during an emergency situation is challenging. We present a rare case of LMCA-ACS caused by a large thrombus in the ascending aorta, confirmed by intravascular ultrasound (IVUS).Case summaryA 90-year-old woman presented to the emergency department complaining of chest pain and syncope. On admission, her electrocardiogram showed normal sinus rhythm and a complete right bundle branch block with significant ST depression in the V3-V6 leads; hence, ACS was suspected. The first emergency angiogram of the left coronary artery showed filling defect in the proximal ascending aorta. IVUS revealed a large thrombus in the ascending aorta. The thrombus extended from the ascending aorta to the proximal left anterior descending coronary artery. IVUS confirmed that there was no dissection of the coronary artery or the proximal ascending aorta. Based on the IVUS findings, this case was diagnosed as ACS of the LMCA caused by a floating thrombus in the ascending aorta.DiscussionThis rare case of LMCA-ACS caused by a thrombus in the ascending aorta was confirmed by IVUS, which can be a useful imaging tool for diagnosing morphological abnormalities during emergencies.
| S-EPMC8374986 | biostudies-literature
Project description:Background: A floating thrombus in an ascending aorta with normal morphology is very rare, but when it does occur, it may induce a systemic embolism or fatal stroke. The pathophysiological mechanisms of aortic mural thrombi remain unclear, and there is no consensus regarding therapeutic recommendations.Case presentation: We report a 49-year-old male who presented with chest discomfort for 5 days and was admitted to our emergency unit. A contrast-enhanced computed tomography angiography (CTA) surprisingly demonstrated a large filling defect suggestive of a thrombus in his otherwise healthy distal ascending aorta. Surgical resection of the mass and attachment site was performed. Histological examination confirmed that the mass was a thrombus, but the cause of the thrombus formation was unknown.Conclusions: floating aortic thrombi are rare, and they are prone to break off, thus carrying a potential risk for embolic events with catastrophic consequences. Surgical resection, both of the aortic thrombus and attachment site, as well as postoperative anticoagulant administration, are standard treatments.
| S-EPMC7724786 | biostudies-literature
Project description: Not available
| S-EPMC5336905 | biostudies-literature
Project description:Aortic mural thrombi of the ascending aorta are rare. If an aortic mural thrombus is dislodged, it can cause various embolic complications, which can sometimes be fatal. Although contrast-enhanced computed tomography (CT) and transesophageal echography are useful for diagnosing aortic mural thrombi, four-dimensional CT (4D-CT) is one of the most useful modalities for both diagnosis and treatment selection in such cases. 4D-CT can be used to evaluate the morphology and mobility of thrombi. Furthermore, it is minimally invasive. To the best of our knowledge, there have not been any reports about 4D-CT being used to depict an asymptomatic ascending aortic thrombus. We report a very unusual case, involving an aortic mural thrombus of the ascending aorta.
| S-EPMC7649852 | biostudies-literature
Project description:A 49-year-old woman was transferred to our hospital with acute-onset chest pain. Her electrocardiogram showed complete atrioventricular block and bradycardia with ST-segment elevation in the inferior leads, and she presented with cardiogenic shock. She was diagnosed with inferior acute myocardial infarction (AMI), and subsequent emergency cardiac catheterization was performed. Selective coronary angiography showed neither stenosis nor obstruction in any of the coronary arteries. Left ventriculography showed a large floating object located on the ascending aortic wall above the ostium of the right coronary artery (RCA). Chest enhanced computed tomography confirmed the floating object in the ascending aorta. These findings suggested that the floating object was associated with the RCA occlusion. To remove the floating object, emergency surgery was performed. The floating object was a large thrombus derived from the localized atheromatous plaque in the ascending aorta. Specialized immunostaining for surface antigen CD34 revealed that regenerated endothelial cells were present on the erosion, along the stalk, and on the floating thrombus. These findings indicate that the CD34-positive endothelial precursor cells strayed into the surface and/or inside of the thrombus, and consequently the floating thrombus supported by these regenerated endothelial cells occluded the RCA, causing AMI. <Learning objective: A free floating thrombus formed in the ascending aorta can cause obstruction of the coronary artery ostium, leading to AMI. This unusual cause of AMI mostly occurs in females, and shows high mortality rates. Although the risk factors are known to be current smoking, oral hormone therapy, and hypercoagulable state such as pregnancy, the underlying mechanism of thrombus formation is still unclear. This report describes a possible role of CD-34 positive regenerated endothelial cells in thrombus formation.>.
| S-EPMC6281505 | biostudies-other
Project description:BackgroundAscending aortic thrombus has been reported in several case reports, often revealed by peripheral embolization, but very few revealed by cardiocerebral infarction. Moreover, there is no defined treatment strategy.Case summaryAn 83-year-old woman was admitted to our intensive care unit for concurrent acute myocardial infarction (AMI) and acute stroke, both with the presence of an embolism. Imaging revealed a floating thrombus in the ascending aorta. The thrombus resolved after anticoagulant therapy was administered, and there was no subsequent embolism recurrence.DiscussionFloating thrombus in the ascending aorta is an unusual cause of AMI. The main mechanisms of thrombus formation include erosion of an atherosclerotic plaque, but it can also form without tissue abnormality with the probable implication of Virchow's triad. However, the precise mechanism for thrombogenesis remains unknown. In patients with a low surgical risk, we should consider surgical treatment, especially as anticoagulant therapy does not appear to reduce the risk of arterial embolization. Thrombolysis and endovascular interventions have also proven effective in certain cases. Overall, in patients with high surgical risk, decision will have to be made on a case-by-case basis.KeywordsAcute myocardial infarction • Embolic stroke • Coronary embolism • Ascending aorta thrombus • Floating thrombus • Case report.
| S-EPMC8652107 | biostudies-literature
Project description:Large mural thrombi in the relatively normal ascending aorta are extremely uncommon conditions that may lead to major adverse cardiovascular events due to new embolism. Because of their changeable variations, the management of these unstable thrombi is challenging and controversial. The size, morphology, location, embolic involvement, and patients' conditions are all crucial for therapeutic decision-making. Treatment options include anticoagulation, thrombolysis, surgical thrombectomy, and endovascular stenting. Therefore, surgical strategies should be highly individualized. Herein, we present a rare case of a huge thrombus from the ascending aorta to the arch in a 43-year-old man. Considering the high risks of catastrophic embolic events, surgical removal of the aortic mass, thromboendarterectomy, and reconstruction of the arterial wall were performed with a satisfactory outcome. This report illustrates our experience of surgical strategies and perioperative treatments for this challenging case, and contemporary surgical management for mural thrombi in the ascending aorta was also thoroughly discussed.
| S-EPMC9996118 | biostudies-literature
Project description:Dissection of the ascending aorta is a very rare but life-threatening complication during diagnostic angiography. We present a case of an elderly woman who underwent an elective diagnostic coronary angiography, complicated with an iatrogenic ascending aorta dissection that did not involve the coronary arteries but originated 4 cm distal of the aortic valve. The patient developed cardiogenic shock due to acute pericardial tamponade and so immediate, life-saving cardiac surgery with implantation of a supracoronary graft was successfully performed. A biopsy from the excised aorta showed loss of smooth muscle cells and accumulation of basophilic ground substance, clear features of cystic media necrosis. This is believed to be the underlying cause of the dissection besides a nonselective injection of the right coronary artery.
| S-EPMC4083777 | biostudies-literature
Project description: Not available
| S-EPMC8350948 | biostudies-literature