Publications by authors named "Kelion A"

Background: Coronary computed tomography angiography (CCTA) is the first line investigation for chest pain, and it is used to guide revascularisation. However, the widespread adoption of CCTA has revealed a large group of individuals without obstructive coronary artery disease (CAD), with unclear prognosis and management. Measurement of coronary inflammation from CCTA using the perivascular fat attenuation index (FAI) Score could enable cardiovascular risk prediction and guide the management of individuals without obstructive CAD.

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Background: Fractional flow reserve-computed tomography (FFR-CT) is endorsed by UK and U.S. chest pain guidelines, but its clinical effectiveness and cost benefit in real-world practice are unknown.

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Heart and circulatory diseases affect more than seven million people in the UK. Non-invasive cardiac imaging is a critical element of contemporary cardiology practice. Progressive improvements in technology over the last 20 years have increased diagnostic accuracy in all modalities and led to the incorporation of non-invasive imaging into many standard cardiac clinical care pathways.

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Article Synopsis
  • A study was conducted on coronary CT angiography (CCTA) over eight years to see how incidental findings outside the heart affect treatment, costs, and overall resource use.
  • Out of 4340 patients, 15.8% had significant extracardiac abnormalities, mainly lung nodules, with very few requiring treatment, though 42.5% were followed up on.
  • The financial analysis revealed that the costs of reporting and follow-up for these findings were substantial, suggesting that the current approach to assessing extracardiac structures during CCTA needs to be reevaluated, especially in healthcare settings with limited resources.
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Objectives: We evaluated graft patency by computed tomography and explored the determinants of intraoperative mean graft flow (MGF) and its contribution to predict early graft occlusion.

Methods: One hundred and forty-eight patients under a single surgeon were prospectively enrolled. Arterial and endoscopically harvested venous conduits were used.

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Preliminary data in human suggest that both Intracardiac echocardiography (ICE) and Intravascular ultrasound (IVUS) can be used for real-time information on the left atrial (LA) wall thickness and on the acute tissue changes produced by energy delivery. This pilot study was conducted to compare ICE and IVUS for real-time LA wall imaging and assessment of acute tissue changes produced by radiofrequency (RF), cryo and laser catheter ablation. Patients scheduled for RF, cryoballoon or laser balloon Pulmonary Vein Isolation (PVI) catheter ablation were enrolled.

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Article Synopsis
  • The study investigated the impact of wild-type transthyretin cardiac amyloidosis (ATTR) on patients with severe aortic stenosis (AS) undergoing transcatheter aortic valve implantation (TAVI), identifying diagnostic and management challenges.
  • Researchers analyzed data from 583 patients, comparing groups with AS, ATTR, AS-ATTR, and age-matched controls, assessing factors like cardiac remodeling and function using NT-proBNP as a main measurement.
  • Results showed that patients with AS-ATTR experienced more severe cardiac issues compared to those with just AS, suggesting that the combined condition is at an early stage of amyloid infiltration, yet still resembles more advanced ATTR complications, indicating potential benefits from ATTR-targeted treatments.
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Aim: To evaluate the use and safety of intravenous (IV) metoprolol in a cohort of patients undergoing coronary computed tomographic angiography (CCTA) at a university hospital, and in particular, to establish if the minimum dose required to achieve the target heart rate (HR) in a given patient can be predicted from the baseline HR.

Materials And Methods: Patients undergoing CCTA at a tertiary centre between January 2015 and May 2018, with baseline HR ≥60 bpm requiring IV metoprolol, were identified retrospectively from the database. Patients with a contraindication to beta-blockade or an indication for CCTA other than coronary disease were excluded.

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Background: Older patients with severe aortic stenosis (AS) are increasingly identified as having cardiac amyloidosis (CA). It is unknown whether concomitant AS-CA has worse outcomes or results in futility of transcatheter aortic valve replacement (TAVR).

Objectives: This study identified clinical characteristics and outcomes of AS-CA compared with lone AS.

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Objectives: The purpose of this study was to validate computed tomography measured ECV (ECV) as part of routine evaluation for the detection of cardiac amyloid in patients with aortic stenosis (AS)-amyloid.

Background: AS-amyloid affects 1 in 7 elderly patients referred for transcatheter aortic valve replacement (TAVR). Bone scintigraphy with exclusion of a plasma cell dyscrasia can diagnose transthyretin-related cardiac amyloid noninvasively, for which novel treatments are emerging.

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Objectives: To assess whether single-photon emission computed tomography (SPECT/CT) quantification of bone scintigraphy would improve diagnostic accuracy and offer a means of quantifying amyloid burden.

Background: Transthyretin-related cardiac amyloidosis is common and can be diagnosed noninvasively using bone scintigraphy; interpretation, however, relies on planar images. SPECT/CT imaging offers 3-dimensional visualization.

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Aims: Cardiac amyloidosis is common in elderly patients with aortic stenosis (AS) referred for transcatheter aortic valve implantation (TAVI). We hypothesized that patients with dual aortic stenosis and cardiac amyloid pathology (AS-amyloid) would have different baseline characteristics, periprocedural and mortality outcomes.

Methods And Results: Patients aged ≥75 with severe AS referred for TAVI at two sites underwent blinded bone scintigraphy prior to intervention (Perugini Grade 0 negative, 1-3 increasingly positive).

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Article Synopsis
  • Coronary inflammation affects the water and lipid balance in perivascular adipose tissue (PVAT), and combining this with additional fibrotic and microvascular changes may enhance cardiac risk prediction.
  • A new AI method analyzes the radiomic profile of coronary PVAT, using data from three studies to link gene expression with CT imaging features related to inflammation and fibrosis.
  • In a large cohort of patients, the developed fat radiomic profile (FRP) successfully predicted major adverse cardiac events (MACE) better than traditional risk factors, improving risk stratification significantly.
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