Publications by authors named "Andy Wang"

Background: The prescribing of opioids to patients for postoperative pain can lead to persistent opioid use. This review investigated the effectiveness of interventions aimed at reducing opioid use in patients after orthopaedic surgery.

Methods: Electronic databases were searched from inception to November 2023.

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Coronary vasospasm can lead to decreased cardiac perfusion and result in acute coronary syndrome. Here is a case of a 49-year-old man presented to the emergency department with epigastric pain and nausea with normal initial electrocardiogram. However, 6 h later, the patient experienced severe chest pain prompting a repeat electrocardiogram demonstrating inferior ST-segment elevation with troponin I levels peaked at 1.

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Article Synopsis
  • A 43-year-old male presented with an enlarging pulsatile mass near his belly button, prompting further investigation.
  • Imaging identified an 8-cm mass next to the left iliac artery, leading doctors to suspect a neuroendocrine tumor due to high blood pressure and catecholamine levels.
  • Laparoscopic surgery successfully removed the mass, which was later found to be a tailgut cyst, emphasizing the effectiveness of laparoscopic techniques and the need for thorough differential diagnoses in surgical cases.
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Objective: We aim to develop a novel method for rare disease concept normalization by fine-tuning Llama 2, an open-source large language model (LLM), using a domain-specific corpus sourced from the Human Phenotype Ontology (HPO).

Methods: We developed an in-house template-based script to generate two corpora for fine-tuning. The first (NAME) contains standardized HPO names, sourced from the HPO vocabularies, along with their corresponding identifiers.

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Diastolic dysfunction occurs when the left ventricle loses its ability to relax normally, impairing ventricular filling during diastole. This most commonly occurs as a pathological sequela of left ventricular hypertrophy and remodeling due to chronic hypertension and/or age-related sclerotic changes of the aortic valve. This can subsequently deteriorate to diastolic heart failure or heart failure with preserved ejection fraction.

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Background: The decision to treat children with benign epilepsy with centrotemporal spikes (BECTS) using antiseizure medications (ASM) is controversial. Our goal is to compare the effect of ASM treatment on the alteration of electroencephalographic (EEG) functional connectivity and power across four frequency bands in children with BECTS.

Methods: Children with BECTS with two-year follow-up were retrospectively divided into ASM versus non-ASM groups.

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Background And Objectives: Whether patent foramen ovale (PFO) closure benefits older patients with PFO and cryptogenic stroke is unknown because randomized controlled trials (RCTs) have predominantly enrolled patients younger than 60 years of age. Our objective was to estimate anticipated effects of PFO closure in older patients to predict the numbers needed to plan an RCT.

Methods: Effectiveness estimates are derived from major observational studies (Risk of Paradoxical Embolism [RoPE] Study and Oxford Vascular Study, together referred to as the "RoPE-Ox" database) and all 6 major RCTs (Systematic, Collaborative, PFO Closure Evaluation [SCOPE] Consortium).

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Context: Pain is a common experience in people living with cancer. Concerns around opioid prescribing have seen a move toward a multi-modality management approach, which includes interventional pain procedures.

Purpose: In this paper we discuss the interventional pain procedures used to treat cancer pain at two major tertiary centers in Australia.

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Article Synopsis
  • The erector spinae plane block (ESPB) is an emerging technique for regional pain relief in lumbar surgery, aiming to enhance recovery by minimizing hospital stays and opioid use.
  • The study involved neurosurgeons using fluoroscopic guidance to perform the ESPB on 21 patients, showing an average procedure time of just 1.2 minutes and effective anesthetic spread along the targeted area.
  • Fluoroscopic guidance proves to be a valuable method for spine surgeons, increasing the efficiency of administering the ESPB and reducing reliance on anesthesiology specialists.
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Background: The ongoing COVID-19 pandemic has impacted health systems globally and affected managing many chronic conditions, including cancer. This study aimed to explore the perceptions of multi-disciplinary cancer care providers on how cancer pain management was affected by the COVID-19 pandemic.

Methods: Participants were eligible if they were cancer care providers of any specialty and discipline from two tertiary hospitals in Australia.

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In the enduring challenge against disease, advancements in medical technology have empowered clinicians with novel diagnostic platforms. Whilst in some cases, a single test may provide a confident diagnosis, often additional tests are required. However, to strike a balance between diagnostic accuracy and cost-effectiveness, one must rigorously construct the clinical pathways.

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Long coronavirus disease (COVID) is the development or persistence of symptoms after an acute SARS-CoV-2 (COVID-19) infection. Fewer patients are developing acute COVID-19 infections, but patients with long COVID continue to have alarming long-term sequelae. Many cardiac magnetic resonance imaging studies show significant changes in cardiac structure after a COVID-19 infection, suggestive of an increased burden of many cardiovascular diseases, notably myocarditis.

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Objective: We aim to develop a novel method for rare disease concept normalization by fine-tuning Llama 2, an open-source large language model (LLM), using a domain-specific corpus sourced from the Human Phenotype Ontology (HPO).

Methods: We developed an in-house template-based script to generate two corpora for fine-tuning. The first (NAME) contains standardized HPO names, sourced from the HPO vocabularies, along with their corresponding identifiers.

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Hydroxychloroquine (HCQ) is a common medication used for the treatment of rheumatic diseases. As a result of its widespread use during COVID-19, there are increasing concerns about its cardiotoxicity. HCQ is known to cause QTc prolongation, and its long-term use has been associated with cardiomyopathy and conduction abnormalities.

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Objective:  To explore whether treatment with multiple Gamma Knife sessions (mGK) resulted in different survival outcomes or cumulative radiation doses compared to single session Gamma Knife (sGK) in patients who have been treated for ≥10 brain metastases (BMs).

Methods:  Thirty-five patients with ≥10 BMs treated with Gamma Knife stereotactic radiosurgery (GK SRS) were identified and separated into sGK vs. mGK cohorts.

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Background: Covert cerebrovascular disease (CCD) includes white matter disease (WMD) and covert brain infarction (CBI). Incidentally discovered CCD is associated with an increased risk of subsequent symptomatic stroke. However, it is unknown whether the severity of WMD or the location of CBI predicts risk.

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Hypertrophic cardiomyopathy is an under-recognized disease with a genetic component that results in abnormal and often asymmetric thickening of the left ventricle in addition to decreased compliance and progressive fibrosis of the myocardium. It further poses significant complications related to dynamic left ventricular outflow obstruction over time in a significant majority. The medical management of obstructive hypertrophic cardiomyopathy has evolved over the decades as our understanding has grown.

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Background: The National Surgical Quality Improvement Program (NSQIP) Surgical Risk Calculator from the American College of Surgeons is a widely available tool for peri-operative risk prediction. This study investigates its predictive performance in an Australian setting.

Methods: A single-centre retrospective external validation study was conducted at a tertiary referral centre in New South Wales, Australia.

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Thrombi in the left atrial appendage (LAA) are an important cause of systemic thromboembolism in patients with atrial fibrillation. The gold standard for the diagnosis of LAA thrombi is a transesophageal echocardiogram, although cardiac multidetector computed tomography, intracardiac echocardiogram, and cardiac magnetic resonance imaging are alternative diagnostic imaging modalities. When an LAA thrombus is diagnosed, effective anticoagulation is recommended for at least 3 weeks or until thrombus resolution is confirmed on repeat transesophageal echocardiogram.

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Anaphylaxis is a life-threatening emergency that may be confused with other less serious conditions. The onset of true anaphylaxis typically occurs within minutes following exposure to an offending agent, and it can variably include dyspnea/wheezing, hemodynamic compromise, rash, hives/pruritus, swelling, or gastrointestinal symptoms. The absence of an expected association between exposure(s) and classic symptoms should lead to the consideration of alternative diagnoses.

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Background: Thoracic epidural analgesia is commonly used for upper gastrointestinal surgery. Intrathecal morphine is an appealing opioid-sparing non-epidural analgesic option, especially for laparoscopic gastrointestinal surgery.

Methods: Following ethics committee approval, we extracted data from the electronic medical records of patients at Royal North Shore Hospital (Sydney, Australia) that had upper gastrointestinal surgery between November 2015 and October 2020.

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Cardiovascular disease (CVD) is a significant cause of death worldwide. To address the global burden of CVD and its risk factors, the polypill, an all-in-one therapy that combines multiple existing medications for preventing CVD and reducing CVD events (such as angiotensin-converting enzyme inhibitor, beta-blocker, statin, or aspirin) into a single combination pill, has emerged as a potential strategy to improve CVD prevention. Clinical trials on the polypill have found that polypill use is associated with significant reductions in CVD events and risk factors in both patients with established CVD and at risk of developing CVD, suggesting a potential benefit in primary and secondary CVD prevention.

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Marijuana is now one of the most widely used substances in the United States that has been rising in prevalence given increasing legalization and recreational and medical usage. Despite its widespread use, there have been increasing concerns regarding the cardiovascular safety of marijuana. Recent studies have found a link between marijuana use and the development of cardiovascular disease.

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Technetium-99mm pyrophosphate (Tc-PYP) scintigraphy is a highly accurate non-invasive method for the diagnosis of transthyretin (ATTR) cardiac amyloidosis. Prognosis for this disease is improved following treatment with the transthyretin (TTR) stabilizer tafamidis. Although tafamidis slows disease progression, its effects on myocardial amyloid and Tc-PYP uptake remain unclear.

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