Publications by authors named "Amit Shah"

Lemmel's syndrome is a rare condition characterized by obstructive jaundice due to the periampullary duodenal diverticulum in the absence of choledocholithiasis or tumors. Its infrequent occurrence and non-specific clinical presentation can make it difficult to distinguish from other conditions. We present a case of Lemmel's syndrome in a 63-year-old male who exhibited symptoms of abdominal pain in right hypochondrium, vomiting, and fever.

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Persons who have experienced a prior myocardial infarction (MI) are at a greater risk of experiencing a secondary event. External factors, such as stress, can cause transient hypertension, further increasing cardiovascular disease risk. However, challenges to monitoring stress-induced hypertension include obtrusiveness of monitoring devices, unknown validity in high-risk populations, and unsubstantiated sensitivity in stressful environments.

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Induced craving frequently leads to relapse in patients with a history of opioid use disorder (OUD). Quantifying the physiological manifestations of craving can enable caregivers of patients with OUD to continuously monitor craving and thus help inform treatment plans. Heart rate variability (HRV) is a promising candidate to capture the trends in such manifestations due to the ease of measuring changes in heartbeat intervals using the electrocardiogram.

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Social determinants of health (SDOH) are known to lead to adverse health outcomes, including high acute care utilization. The mechanisms underlying healthcare disparities among children who have undergone liver transplantation (LT) are poorly understood. To elucidate the relationship between SDOH and healthcare utilization among children (<18 y old at time of LT) who have undergone LT, we performed a retrospective study merging data from the Organ Procurement and Transplantation Network (OPTN) and the Pediatric Hospital Information System (PHIS) database.

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Background: Adherence to heart failure (HF) management guidelines is important to optimise clinical outcomes but can be variable in practice. This study compared prescribing guideline-advocated pharmacological and non-pharmacological management of HF between patients discharged from cardiology and non-cardiology wards.

Method: A retrospective audit of electronic medical records was undertaken of patients discharged from cardiology (n=100) or non-cardiology wards (n=100) of a tertiary hospital with a primary diagnosis of HF.

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Background: Acute psychological stress may induce physiological changes predisposing individuals to adverse health outcomes through hemodynamic and vascular effects. We studied the association between the aggregated stress-induced changes in hemodynamic and vascular function tests with adverse cardiovascular outcomes in patients with coronary artery disease, after adjusting for sociodemographic and clinical factors.

Methods And Results: Individuals with stable coronary artery disease from 2 prospective cohort studies were studied.

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Purpose: Medical student education in geriatrics is a critical need for every doctor-in-training as the population ages, with fewer than 7,000 geriatricians, and older patients, who now approach 20% of the U.S. population, having unique health care needs.

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Article Synopsis
  • Machine learning, particularly deep learning with convolutional neural networks (CNNs), is being used to detect prostate cancer in tissue slides, but sample type differences affect model accuracy.
  • Research tested whether CNNs trained on one type of sample (biopsy or radical prostatectomy) could effectively analyze the other type, revealing a significant drop in performance across sample types.
  • Results indicated that models performed well on their own sample but poorly on the alternative type, highlighting the need to consider morphological differences in training to improve cancer detection accuracy in clinical settings.*
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  • The study investigates how acute psychological stress impacts cardiovascular disease (CVD) mortality, focusing on autonomic dysfunction as indicated by electrocardiographic measures.
  • In a cohort of 765 participants with stable CVD, researchers monitored heart rate variability (HRV) during stress tests and found a significant association between decreased HRV during stress and a higher risk of CVD death.
  • The findings suggest that both stress-induced decreases in HRV and low resting HRV independently increase the risk of CVD mortality, highlighting the need for further research on managing autonomic dysfunction to improve health outcomes.
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  • PTSD is linked to a higher risk of heart failure hospitalizations in individuals with coronary artery disease, with those diagnosed having a 4.4 times greater risk of hospitalizations compared to those without PTSD.
  • The study involved 736 participants, revealing that 9.4% had PTSD, and higher PTSD symptom scores correlated with increased heart failure events.
  • While PTSD is strongly associated with heart failure, it does not appear to influence rates of cardiovascular death or nonfatal heart attacks unrelated to heart failure hospitalizations.
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Background: Work-related stress is a psychosocial risk factor linked to a higher risk of cardiovascular disease. However, the association between work-related stress and cardiovascular health (CVH) is not well established. We estimated the association between work-related stress and CVH in a multiethnic sample of adults free of cardiovascular disease at baseline.

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Excessive peripheral microvascular constriction during acute psychological stress reflects similar changes in coronary blood flow and is a predictor of adverse cardiovascular outcomes. Among individuals with coronary artery disease (CAD), we sought to determine if genetic factors contribute to the degree of microvascular constriction during mental stress. A total of 580 stable CAD individuals from two prospective cohort studies underwent mental stress testing.

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Background: Exploring longitudinal associations of blood biomarkers with left atrial (LA) structure and function can enhance our understanding of atrial fibrillation (AF) etiopathogenesis.

Methods: We studied 532 participants of the PREDIMED-Plus trial, a multicenter randomized trial in overweight and obese adults with metabolic syndrome. At baseline, 3 and 5 years after randomization, participants underwent transthoracic echocardiography and provided blood for serum biomarker measurements [propeptide of procollagen type I (PICP), high-sensitivity (hs) troponin T (hsTnT), hs C-reactive protein (hsCRP), 3-nitrotyrosine (3-NT), and N-terminal propeptide of B-type natriuretic peptide (NT-proBNP)].

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  • Diabetes insipidus is a condition marked by excessive urine production and intense thirst, as seen in a 49-year-old man with symptoms lasting 3 months.
  • He was diagnosed with partial nephrogenic diabetes insipidus due to his inability to concentrate urine and a poor response to desmopressin.
  • Additionally, his recurrent low potassium levels led to the diagnosis of Gitelman syndrome, and with increased fluid intake and potassium supplementation, his symptoms improved, showing potential reversibility of the condition.
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Background: The usual procedure for nasolacrimal duct obstruction is dacryocystorhinostomy (DCR). Flap-based DCR techniques lead to better surgical outcome provided flaps do not dislocate in the post-operative period.

Objectives: This study was conducted to compare gelfoam with merocel tamponade for fixation of mucosal flaps in endoscopic DCR.

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Students as Teachers is a 7-month student-led elective that equips first- and second-year medical students with teaching skills. Pre- and post-course surveys measured participants' knowledge and confidence level in the course's learning objectives such as creating lesson plans, engaging learners, and assessing understanding. Eleven students participated in the course and 10 students completed the pre- and post-course surveys.

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Objectives: Apply a modified Delphi-based approach and produce a practical, radiology-specific set of definitions for interpretation and standardization of the multiple MRI findings in axial spondyloarthritis (ax-SpA), specifically to aid the general radiologist with a musculoskeletal interest, working with gold standard basic MRI protocols.

Materials And Methods: We report the results of a modified Delphi-based consensus of 35 experts from 13 countries in the Arthritis Subcommittee of the European Society of Musculoskeletal Radiology (ESSR). Seventeen definitions were created (i.

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  • Obstructive sleep apnea (OSA) is prevalent among older adults, particularly those over 65, and its relationship with posttraumatic stress disorder (PTSD) requires further research for personalized treatment approaches.
  • The study utilized a cross-sectional design involving male Vietnam War veteran twins to examine the link between PTSD symptoms and OSA, employing in-laboratory polysomnography for evaluation.
  • Results indicated that a 15-point increase in PTSD symptom severity was correlated with a higher apnea-hypopnea index, suggesting that PTSD may significantly impact OSA severity.
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For women under age 65, varying recommendations and the need to apply clinical risk calculators can lead to underscreening for osteoporosis. The resulting undertreatment may lead to a risk of osteoporotic fractures with significant morbidity and impact on functional status. Factors that must be considered when deciding to screen a woman under age 65 include a history of fragility fractures, race, family history, body mass index, smoking, high alcohol use, and secondary causes of osteoporosis.

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  • Mental stress-induced myocardial ischemia (MSIMI) is linked to poorer heart health outcomes in people with coronary artery disease, but how stress affects heart function is not fully understood.
  • This study involved 735 patients and looked at their heart rate variability (HRV) during stress to see if low HRV indicates autonomic dysfunction associated with MSIMI.
  • Results showed that patients with low HRV during stress had significantly higher odds of experiencing MSIMI, suggesting that stress-related autonomic dysfunction could contribute to heart issues in these patients.
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  • Hepatic artery complications (HACs) after pediatric liver transplantation can lead to significant health issues, and this study aims to understand how common they are, how they are managed, and what outcomes arise from these complications.
  • The research utilizes the international HEPATIC Registry, collecting data on pediatric patients under 18 who experienced HAC within the last 20 years, focusing on survival rates and treatment success.
  • Ethical approval will be obtained from all participating sites, and findings will be shared at conferences and in academic journals, with the study registered on ClinicalTrials.gov (NCT05818644).
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JCO NRG Oncology RTOG 0415 is a randomized phase III noninferiority (NI) clinical trial comparing conventional fractionation (73.8 Gy in 41 fractions) radiotherapy (C-RT) with hypofractionation (H-RT; 70 Gy in 28) in patients with low-risk prostate cancer. The study included 1,092 protocol-eligible patients initially reported in 2016 with a median follow-up of 5.

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Assembling atomic layers of van der Waals materials (vdW) combines the physics of two materials, offering opportunities for novel functional devices. Realization of this has been possible because of advancements in nanofabrication processes which often involve chemical processing of the materials under study; this can be detrimental to device performance. To address this issue, we have developed a modified micro-manipulator setup for cryogenic exfoliation, pick up, and transfer of vdW materials to assemble heterostructures.

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