Assessment of the Relationship Between the Coronary Venous and Arterial Systems Using 256-Slice Computed Tomography

Objectives To investigate the coronary venous system (CVS) and its spatial relationship with coronary arteries by using 256-slice computed tomography (CT). Methods One hundred one patients underwent coronary CT angiography by using a 256-slice CT. In each patient, the CVS and its spatial relationship with coronary arteries were analyzed. We measured the diameters and angulations of the coronary sinus (CS), great cardiac vein, anterior interventricular vein (AIV), left marginal vein, posterior vein of the left ventricle (PVLV), and posterior interventricular vein (PIV), and the distances, respectively, from the CS ostium and from the crossing point to the ostium of corresponding tributaries. Results The following 5 pairs of veins and arteries had a higher frequency of intersecting compared with others: the CS/great cardiac vein and the left circumflex coronary artery (97.1%), the AIV and the diagonal or ramus branch (92.1%), the PIV and the posterior branch of left ventricle artery (88.1%), the left marginal vein and the circumflex or circumflex marginal (73.9%), and the PVLV and the circumflex or circumflex marginal (31.6%). The other 2 pairs had a higher frequency of running parallel to each other: the AIV and the left anterior descending artery (76.2%) and the PIV and the posterior descending artery (54.4%). Most tributaries were lateral to their corresponding arteries at the crossing point except for the AIV. For the PVLV and PIV, the distances from the crossing po...
Source: Journal of Computer Assisted Tomography - Category: Radiology Tags: Cardiovascular Imaging Source Type: research

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ConclusionThe vessel-specific MCP myocardial perfusion territory assignment technique more accurately quantifies LCA and RCA perfusion territories as compared with the current standard AHA 17-segment model. Therefore, it can potentially provide a more comprehensive and patient-specific evaluation of coronary artery disease.Key Points• The minimum cost path (MCP) technique accurately determines left and right coronary artery perfusion territories, as compared with the American Heart Association 17-segment (AHA) model.• The minimum cost path (MCP) technique could be applied to cardiac computed-tomography angiograph...
Source: European Radiology - Category: Radiology Source Type: research
Myocardial extracellular volume fraction (ECV) derived from CT delayed enhancement (CTDE) may allow assessment of diffuse myocardial fibrosis. However, the amount of contrast medium required for ECV estimation has not been established. Since ECV estimation by CT is typically performed in combination with coronary CT angiography (CCTA) in clinical settings, we aimed to investigate whether reliable ECV estimation is possible using the contrast dose optimized for CCTA without additional contrast administration.
Source: Journal of Cardiovascular Computed Tomography - Category: Radiology Authors: Source Type: research
ConclusionSurgical clipping remains a safe and useful treatment option for pericallosal artery aneurysms in a low-resource neurosurgical facility.
Source: International Journal of Surgery Case Reports - Category: Surgery Source Type: research
Objective: To explore the value of whole-brain perfusion parameters combined with multiphase computed tomography angiography (MP-CTA) in predicting the hemorrhagic transformation (HT) of ischemic stroke. Methods: A total of 64 patients with ischemic stroke who underwent noncontrast computed tomography, computed tomography perfusion imaging, and computed tomography angiography before treatment from August 2017 to June 2019 were included retrospectively. The perfusion parameters cerebral blood volume (CBV), cerebral blood flow (CBF), time to peak (TTP), mean transit time (MTT), time to maximum (Tmax), and permeability surfac...
Source: Journal of Stroke and Cerebrovascular Diseases - Category: Neurology Authors: Source Type: research
Discussion: Despite some discrepancy regarding the incidence, both cohorts show a non-negligible long-term risk of aneurysm recurrence and de novo aneurysm formation, which warrants life-long imaging follow-up.Abbreviations: SD: standard deviation; DSA: digital subtraction angiography; CTA: computed tomography angiography; MRA: magnetic resonance angiography; MCA: middle cerebral artery; ACA: anterior cerebral artery; ACommA: anterior communicating artery; ICA: internal carotid artery; ADPKD: autosomal dominant polycystic kidney disease; MeSH: Medical Subject Headings. PMID: 32048571 [PubMed - as supplied by publisher]
Source: Neurological Research - Category: Neurology Tags: Neurol Res Source Type: research
This study assessed predictors of pulmonary thromboembolism (PE) resolution and their implications for clinical outcome.MethodA total of 150 patients with acute PE diagnosed by computed tomography pulmonary angiography (CTPA) were included. All patients received anticoagulant therapy for 3 ‐6 months and were followed‐up for at least 2 years. D‐dimer levels in plasma were assayed at the first admission and during follow‐up.ResultsThe rate of CTPA ‐confirmed PE resolution was 48.67% at 6 months, 68% at 12 months, and 78.67% at 24 months. Thirty‐nine patients had recurrent thrombosis after anticoagulation therapy ...
Source: The Clinical Respiratory Journal - Category: Respiratory Medicine Authors: Tags: ORIGINAL ARTICLE Source Type: research
The recent article from McCluskey et al “Radiological Eye Deviation as a Predictor of Large Vessel Occlusion in Acute Ischaemic Stroke” J of Stroke and Cerebrovasc Dis. 2019; 28:2318-23231 provides valuable information that may lead to early stroke intervention. They found that subjective visual detection of radiographic eye deviation on nonenhanced computed tomography (NECT) brain is strongly associated with large vessel occlusion (LVO). This compelling association may expedite patients for timely angiographic testing and endovascular therapy.
Source: Journal of Stroke and Cerebrovascular Diseases - Category: Neurology Authors: Tags: Letter to the Editor Source Type: research
AbstractBackgroundAtrial myxoma remains a rare clinical entity with an incidence of surgically resected cases of 0.5 –0.7 per million population and prevalence of
Source: Journal of Medical Case Reports - Category: General Medicine Source Type: research
ConclusionsWe successfully developed a deep learning model that can automatically detect aneurysms. The model performed well for aneurysms of different sizes or in different locations. This finding indicates that the deep learning model has the potential to vastly improve clinician performance by providing automated aneurysm detection.
Source: International Journal of Computer Assisted Radiology and Surgery - Category: Intensive Care Source Type: research
CONCLUSIONS: Renal artery re-intervention following renal denervation with the most commonly applied RF renal denervation system (Symplicity™) is rare. Most events were identified within 1 year. PMID: 32038027 [PubMed - as supplied by publisher]
Source: EuroIntervention - Category: Cardiovascular & Thoracic Surgery Tags: EuroIntervention Source Type: research
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