Umer M Darr

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OBJECTIVES To document our experience with gastric carcinoids over the past decade and to identify lesion frequency and the existence of a relationship to low acid states. DESIGN Retrospective case series. SETTING Tertiary care referral center. PATIENTS A consecutive sample of 16 patients with gastric carcinoids was evaluated over the last decade.(More)
The mastomys rodent exhibits a genetic propensity to develop gastric carcinoid tumors. Utilizing acid inhibitory pharmacotherapy (histamine-2 receptor antagonists and proton pump inhibitors), we have demonstrated transformation from normal to neoplastic enterochromaffin-like (ECL) cells in a well-defined fashion over a period of 4 months. In addition, we(More)
BACKGROUND Cognitive and functional impairment increase risk for post-coronary artery bypass graft (CABG) surgery delirium (PCD), but how much impairment is necessary to increase PCD risk remains unclear. METHODS The Neuropsychiatric Outcomes After Heart Surgery (NOAHS) study is a prospective, observational cohort study of participants undergoing elective(More)
A 43-year-old woman presented with chest pain of unclear cause. The patient's mother and brother had suffered aortic dissection. Echocardiography had shown mild dilatation of the ascending aorta at 4.0 cm. Echocardiogram and magnetic resonance imaging were negative for dissection. The patient was taken to the operating room on the basis of her painful(More)
Dead space fraction (V d/V t) measurement performed using volumetric capnography requires arterial blood gas (ABG) sampling to estimate the partial pressure of carbon dioxide (PaCO2). In recent years, transcutaneous capnography (PtcCO2) has emerged as a noninvasive method of estimating PaCO2. We hypothesized that PtcCO2 can be used as a substitute for PaCO2(More)
OBJECTIVES The objective of this study is to retrospectively analyse surgical outcomes in patients aged 75-79, and 80 and above. METHODS Between 2000 and 2015, 108 patients aged 75-79 (G 75 , mean age 76.9 ± 1.5years) and 72 patients aged 80 and above (G 80 , mean age 82.2 ± 2.1years) underwent elective aneurysm repair. Operative outcome and survival was(More)
BACKGROUND Resumption of dual antiplatelet therapy after coronary artery bypass grafting in patients presenting with acute coronary syndrome is recommended, but the current practice pattern in the United States remains unknown. We aimed to investigate the current pattern of dual antiplatelet therapy use after coronary artery bypass grafting at the Yale-New(More)
INTRODUCTION Urinary biomarkers of kidney injury are presumed to reflect renal tubular damage. However, their concentrations may be influenced by other factors, such as hematuria or pyuria. We sought to examine what non-injury related urinalysis factors are associated with urinary biomarker levels. METHODS We examined 714 adults who underwent cardiac(More)
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