Publications by authors named "Chetan Varma"

The coronavirus disease 2019 (COVID-19) commonly involves the respiratory system but increasingly cardiovascular involvement is recognised. We assessed electrocardiogram (ECG) abnormalities in patients with COVID-19. We performed retrospective analysis of the hospital's COVID-19 database from April to May 2020.

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Background Natriuretic peptides are routinely quantified to diagnose heart failure (HF). Their concentrations are also elevated in atrial fibrillation (AF). To clarify their value in predicting future cardiovascular events, we measured natriuretic peptides in unselected patients with cardiovascular conditions and related their concentrations to AF and HF status and outcomes.

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Introduction: Coronary artery calcification remains a challenge in percutaneous coronary interventions, due to the higher risk of suboptimal result with subsequent poor clinical outcomes. Intravascular lithotripsy is a novel way of treating severe coronary calcification as it has the ability to modify calcium both circumferentially as well as transmurally, facilitating stent expansion and apposition. We conducted a systematic overview of the published literature on intravascular lithotripsy (IVL) assessing the efficacy and feasibility of IVL in treating severe coronary calcification.

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At Sandwell and West Birmingham Hospitals Trust, an emergency rota was put into place in anticipation of the COVID-19 pandemic. Key changes included re-deploying non-general medical (GIM) consultants on to the GIM on-call rota and re-deploying junior doctors on to medical rotas, and introducing a COVID-19 induction training programme to support these redeployments. Results from a survey showed 100% of consultants felt the rotas were resilient, with 96% of consultants stating they felt the rotas were well-staffed and 77% stating that they observed no drop in quality of care.

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Left main stem (LMS) disease is identified in up to 5% of diagnostic angiography cases, and is associated with significant morbidity and mortality due to the proportion of myocardium it subtends. In the past 10 years, there has been a significant change in the way we contemplate treating lesions in the LMS due to evolving experience and evidence in percutaneous coronary intervention (PCI) strategies and technologies. This has been reflected in recent changes in European and International guidance on managing patients with this lesion subset.

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Background And Aims: The consultant of the week (COW) model of inpatient care means the consultants' primary focus is to deliver ward-based care daily. At Sandwell and West Birmingham Hospitals NHS Trust, a COW model has been successfully used for cardiology and stroke services. This has improved continuity of care and developed a 7-day working week.

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Background/purpose: Calcified coronary artery stenosis remains a challenge for Percutaneous Coronary Intervention (PCI). Calcium modification is facilitated by rotablation and is used in 1-3% of cases. Data on rotablation in patients ≥80 years is limited and perceived to be high risk.

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Background: The Summary Hospital-level Mortality Indicator (SHMI) for Myocardial Infarction (MI) is the ratio of the observed to the expected number of deaths due to MI. We aimed to assess (1) the accuracy of MI as a diagnosis in the SHMI for MI and (2) the healthcare received by patients with type 1 MI included in the SHMI for MI.

Methods: Retrospective review of patients included in SHMI for MI from April 2017 to March 2018.

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Objectives: Prolonged ECG monitoring is clinically useful to detect unknown atrial fibrillation (AF) in stroke survivors. The diagnostic yield of prolonged ECG monitoring in other patient populations is less well characterised. We therefore studied the diagnostic yield of prolonged Holter ECG monitoring for AF in an patient cohort referred from primary care or seen in a teaching hospital.

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Aims: Single-photon emission computed tomography myocardial perfusion imaging [SPECT-MPI] is a functional test for coronary ischemia. We aimed to assess the additive prognostic value of coronary calcium score (CCS) to SPECT-MPI in stable patients.

Methods: This study is a retrospective analysis of 655 patients who underwent SPECT-MPI with CCS (2012 to 2017).

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Background: Monocyte-platelet aggregates (MPAs) form when Mon1, Mon2 or Mon3 monocyte subsets adhere to platelets. They are pathophysiologically linked to coronary artery disease (CAD). However, their individual roles in the occurrence of diffuse CAD remain unknown.

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Scientific understanding of atherogenesis is constantly developing. From Virchow's observations 160 years ago we now recognize the endothelial response to injury as inflammatory, involved in all stages of atherosclerosis. Endothelial activation may cause reversible injury or dysfunction, or lead to irreparable damage.

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Despite falling age-adjusted mortality rates coronary artery disease (CAD) remains the leading cause of death worldwide. Advanced diffuse CAD is becoming an important entity of modern cardiology as more patients with historical revascularisation no longer have suitable anatomy for additional procedures. Advances in the treatment of diffuse obstructive CAD are hampered by a poor understanding of its development.

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Background: Studies have shown higher in-hospital mortality for female patients and ethnic minorities admitted to hospital with acute ST elevation myocardial infarction (STEMI). Pre-hospital delay is thought to be associated with increased in-hospital mortality.

Aim: To assess the impact of gender and ethnicity on symptom-to-door time (STDT) in patients presenting with STEMI.

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Primary percutaneous coronary intervention (PPCI) is the reperfusion treatment of choice for acute ST-elevation myocardial infarction with studies having demonstrated improved outcomes with PPCI over thrombolysis. Its use has increased substantially over the last decade, overtaking thrombolytic therapy in many countries. This has been paralleled with advances in adjunctive technology and pharmacological therapy to further improve outcome, but challenges remain for PPCI practitioners.

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The sensitivity and specificity of structural assessment of the heart by echocardiography in black hypertensive patients presenting with symptoms of heart failure is often incomplete. Cardiovascular magnetic resonance, mainly by virtue of its ability to characterize myocardial tissue composition, may be of value in differentiating some of the common pathologies noninvasively. We present an illustrative case of hypertrophic cardiomyopathy in a British Afro Caribbean hypertensive patient where at least some features of familial amyloidosis were present on screening echocardiography.

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Introduction: Several inflammatory markers have been shown to be independent predictors for both the development of clinically significant atherosclerosis and for adverse outcome in patients with symptomatic coronary artery disease (CAD). We investigated the prognostic role of eosinophil count in low to intermediate risk patients with CAD.

Methods: We studied 909 patients admitted for elective or urgent percutaneous coronary intervention (PCI) from April 2002 to December 2004, and measured pre-procedural total and differential white blood cell (WBC) counts.

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Article Synopsis
  • - The study aimed to assess whether endothelial progenitor cell capturing stents (ECS) are at least as effective as drug-eluting stents (DES) in preventing target lesion failure (TLF) within one year after use in patients at high risk of restenosis.
  • - Researchers planned to enroll 1,300 patients but had to stop the trial early when they observed a significantly higher rate of TLF (17.4%) in patients with ECS compared to those with DES (7.0%).
  • - The findings indicate that ECS may not be as effective as DES for preventing restenosis in high-risk patients, suggesting further long-term studies are needed to evaluate the full potential and benefits of ECS.
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Lipid lowering with statins improves morbidity and mortality, particularly in diabetics, and may have additional nonlipid effects. South Asians (SAs) are at higher risk of cardiovascular disease and diabetes compared with white Europeans (WEs). We hypothesized that abnormal endothelial (marked by von Willebrand factor), angiogenesis (VEGF, angiopoietins 1 and 2) and platelet function (soluble P selectin, soluble CD40L) improve with statin treatment in diabetics in different ethnic groups.

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Culture-negative endocarditis (CNE) presents physicians with diagnostic and treatment challenges. Postpartum endocarditis is rare and usually culture negative. Empirical antimicrobial regimes lead to the risk of aggressive treatment with potentially toxic drugs.

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Introduction: Isolated posterior ST-elevation myocardial infarction (STEMI) accounts for up to 7% of STEMIs. The diagnosis is suggested by indirect anterior-lead ECG changes. Confirmation requires presence of ST-elevation in posterior-leads (V7-V9).

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Endothelial Progenitor Cells (EPC) were first described in 1997 and have since been the subject of numerous investigative studies exploring the potential of these cells in the process of cardiovascular damage and repair. Whilst their exact definition and mechanism of action remains unclear, they are directly influenced by different cardiovascular risk factors and have a definite role to play in defining cardiovascular risk. Furthermore, EPCs may have important therapeutic implications and further understanding of their pathophysiology has enabled us to explore new possibilities in the management of cardiovascular disease.

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