Publications by authors named "Khattar R"

Background: Echocardiography, cardiac magnetic resonance and cardiac fluorodeoxyglucose positron emission tomography (FDG-PET) imaging play key roles in the diagnosis and management of cardiac sarcoidosis (CS), but the relative value of each modality in predicting outcomes has yet to be determined. This study sought to determine the prognostic importance of multimodality imaging data over and above demographic characteristics and left ventricular ejection fraction (LVEF).

Methods: Consecutive patients newly diagnosed with CS were included.

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Background: Cardiac Resynchronisation Therapy (CRT) has demonstrated short and long-term benefit in heart failure with reduced ejection fraction (HFrEF), including ischaemic (ICM) and non-ischaemic cardiomyopathy. However, there is a paucity of evidence regarding its role in cardiac sarcoidosis (CS).

Methods: Consecutive CS patients with CRT and baseline left ventricle ejection fraction (LVEF)≤40 referred to one specialist hospital in London between November 2008-March 2023 were retrospectively reviewed.

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Aims: In cardiac sarcoidosis (CS) patients, the benefit of cardiac resynchronization therapy (CRT) remains unclear. We sought to assess the short-term and long-term effects of CRT in CS patients with a range of left ventricular (LV) ejection fractions (LVEFs).

Methods: Consecutive CS patients with heart failure with reduced ejection fraction (HFrEF; LVEF ≤ 40%), mildly reduced ejection fraction (HFmrEF; LVEF 41%-49%) and preserved ejection fraction (HFpEF; LVEF ≥ 50) treated with CRT under the care of a tertiary UK centre between 2008 and 2023 were reviewed.

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Introduction: The history of standardization relating to the activities of medical laboratories traces the development of quality system standards in the world, and their evolution.

Content: In this study, we have included the key benchmarks that represent the stages of the quality system's evolution in recent decades. Accreditation of medical laboratories has become compulsory in most countries, regarding national or international standards.

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Article Synopsis
  • This study examined sex differences in patients with cardiac sarcoidosis (CS) undergoing implantable cardioverter-defibrillator (ICD) implantation, using data from the National Inpatient Sample between 2016-2020.
  • It was found that the majority of patients were male, who were generally younger and had higher rates of diabetes and chronic kidney disease, but lower rates of certain heart conditions compared to females.
  • Although initial major adverse cardiovascular events (MACE) were higher in females, adjusted analyses showed that females actually had lower odds of experiencing MACE and acute kidney injury post-ICD compared to males.
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Cardiac sarcoidosis is associated with significant morbidity and mortality. Immunosuppressive treatment focuses on suppressing myocardial inflammation, which can lead to major adverse events especially when progressing to fibrosis. Conventional management usually includes steroids and steroid sparing agents such as methotrexate and azathioprine.

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Introduction: Sarcoidosis is a systemic inflammatory disorder characterised by non-caseating granulomas. Cardiac sarcoidosis (CS) normally causes conduction abnormalities, ventricular arrhythmias, and heart failure. Little is known about the characteristics and impact of sarcoidosis in patients admitted with ST-elevation myocardial infarction (STEMI).

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  • This study examined the impact of delayed diagnosis of Cardiac Sarcoidosis (CS) following high-grade atrioventricular block (AVB) in 77 patients over 16 years.
  • Results indicated that patients with a later diagnosis experienced more adverse health outcomes, including higher rates of mortality and hospitalizations for heart failure.
  • Additionally, those diagnosed late required higher doses of prednisolone and more frequent upgrades of cardiac devices compared to those diagnosed early.
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Background: Myocardial inflammation and perfusion defects detected by F-fludeoxyglucose (FDG) and Rubidium-82 positron emission tomography (PET) may be associated with ventricular arrhythmias (VAs) in cardiac sarcoidosis (CS). The role of serial quantitative PET in determining the effect of treatment on myocardial inflammation and clinical outcomes is yet to be defined.

Methods: Newly diagnosed CS patients with active myocardial inflammation (maximum standardised uptake value (SUVmax) ≥ 2.

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Background: Work-related musculoskeletal pain (WRMSP) is increasingly recognised in cardiac ultrasound practice. WRMSP can impact workforce health, productivity and sustainability. We sought to investigate the prevalence, characteristics and clinical impact of WRMSP.

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Background: Cardiac sarcoidosis (CS) is frequently associated with conduction abnormalities and arrhythmias. In this study, we aim to evaluate racial disparities in the frequency of arrhythmias, and associated co-morbidities, among patients with CS.

Methods: White and African American (AA) patients diagnosed with CS were identified and compared from the 2016-2020 National Inpatient Sample (NIS) database whilst adjusting for confounders via logistic regression models.

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Purpose To compare left ventricular ejection fraction (LVEF) measured with echocardiography and cardiac MRI in individuals with cancer and suspected cardiotoxicity and assess the potential effect on downstream clinical decision-making. Materials and Methods In this prospective, single-center observational cohort study, participants underwent same-day two-dimensional (2D) echocardiography and cardiac MRI between 2011 and 2021. Participants with suboptimal image quality were excluded.

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Importance: In the Revascularization for Ischemic Ventricular Dysfunction (REVIVED-BCIS2) trial, percutaneous coronary intervention (PCI) did not improve outcomes for patients with ischemic left ventricular dysfunction. Whether myocardial viability testing had prognostic utility for these patients or identified a subpopulation who may benefit from PCI remained unclear.

Objective: To determine the effect of the extent of viable and nonviable myocardium on the effectiveness of PCI, prognosis, and improvement in left ventricular function.

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Aims: Cardiac sarcoidosis (CS) is a potentially fatal condition that varies in its clinical presentation. Here, we describe baseline characteristics at presentation along with prognosis and predictors of outcome in a sizable and deeply phenotyped contemporary cohort of CS patients.

Methods And Results: Consecutive CS patients seen at one institution were retrospectively enrolled after undergoing laboratory testing, electrocardiogram, echocardiography, cardiac magnetic resonance (CMR) imaging and F-flourodeoxyglucose positron emission tomography (FDG-PET) at baseline.

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Background: Mitral regurgitation may develop or worsen following right ventricular apical pacing due to dyssynchronous left ventricular contraction. Pre-existing secondary mitral annular dilation is a well-recognized and important contributing factor. This description of pacing-induced torrential mitral regurgitation in the setting of rheumatic mitral valve disease is a rare case in which a primary mitral valve lesion was the antecedent mechanism.

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Cardiac sarcoidosis (CS) is a rare inflammatory disorder characterised by the presence of non-caseating granulomas within the myocardium. Contemporary studies have revealed that 25-30% of patients with systemic sarcoidosis have cardiac involvement, with detection rates increasing in the era of advanced cardiac imaging. The use of late gadolinium enhancement cardiac magnetic resonance and fluorodeoxy glucose positron emission tomography (FDG-PET) imaging has superseded endomyocardial biopsy for the diagnosis of CS.

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Aims: There is a paucity of randomized diagnostic studies in women with suspected coronary artery disease (CAD). This study sought to assess the relative value of exercise stress echocardiography (ESE) compared with exercise electrocardiography (Ex-ECG) in women with CAD.

Methods And Results: Accordingly, 416 women with no prior CAD and intermediate probability of CAD (mean pre-test probability 41%), were randomized to undergo either Ex-ECG or ESE.

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Article Synopsis
  • The study examined how left atrial (LA) function changed after ablation treatment for long-standing persistent atrial fibrillation (AF) and its relation to AF recurrence in patients from the CASA-AF trial.
  • Assessment involved echocardiography before and after the procedure, measuring LA volumes and function, along with left ventricular diastolic function using specialized Doppler techniques.
  • Results showed that patients who maintained sinus rhythm post-ablation had better LA function and diastolic parameters compared to those who experienced AF recurrence, with LA contractile strain at 3 months being a key predictor of whether AF would return.
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  • Reversal of severe tricuspid regurgitation is uncommon, but a case demonstrates that proper immunosuppression with standard heart failure treatments can lead to improvement.* -
  • The patient had cardiac sarcoidosis, emphasizing the importance of specific therapy in managing this condition.* -
  • The text highlights the diagnostic difficulties in differentiating cardiac sarcoidosis from other heart diseases in patients experiencing biventricular failure.*
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Aortic dissection is an uncommon yet frequently fatal illness. Patients generally present with tearing chest pain with possible acute hemodynamic instability. Hence, early diagnosis and intervention is critical for survival.

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