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Benjamin chow ottawa

Swapnil Hiremath, Jeanne Fran├žoise Kayibanda, Benjamin J W Chow, Dean Fergusson, Greg A Knoll, Wael Shabana, Brianna Lahey, Olivia McBride, Alexandra Davis, Ayub Akbari
BACKGROUND: Contrast-induced acute kidney injury (CI-AKI) is defined as worsening of renal function after the administration of iodinated contrast material. In patients with cardiovascular disease, kidney disease, and/or diabetes, renin-angiotensin system blockers, non-steroidal anti-inflammatory drugs, diuretics, and metformin can increase the risk of CI-AKI when undergoing contrast imaging. Despite CI-AKI being the leading iatrogenic cause of acute kidney injury, there is a lack of sufficient scientific evidence supporting which drugs should be stopped, when they should be stopped, and when they should be resumed...
February 21, 2018: Systematic Reviews
Karan Bami, Manuja Premaratne, Jasmine Lamba, Yeung Yam, Alomgir Hossain, Marissa Keenan, Tony Haddad, Saipriya Anand, Ian G Burwash, Terrence D Ruddy, Girish Dwivedi, Benjamin J W Chow
BACKGROUND: Appropriate Use Criteria (AUC) guidelines for cardiac computed tomography (CCT) were developed to limit testing to reasonable clinical settings. However, significant testing is still done for inappropriate indications. This study investigates the impact of AUC on evaluability of CCT to determine if inappropriate tests result in a greater proportion of nondiagnostic results. METHODS: Investigators reviewed the medical records of 2417 consecutive patients who underwent CCT at the University of Ottawa Heart Institute...
September 2017: Journal of Computer Assisted Tomography
Behnam Banihashemi, Kasra Maftoon, Benjamin J W Chow, Jordan Bernick, George A Wells, Ian G Burwash
BACKGROUND: Monitoring the adherence to Appropriateness Use Criteria (AUC) has been identified as an important component for the accreditation of echocardiography laboratories. Referral requisitions are a logical tool to rapidly determine the appropriateness of transthoracic echocardiography (TTE) referrals, however data is lacking. We investigated whether standard free-form-text TTE referral requisitions can be used to evaluate AUC adherence. METHODS: Consecutive TTE referral requisitions to the University of Ottawa Heart Institute echocardiography laboratory were reviewed over a four-week period...
January 15, 2015: Cardiovascular Ultrasound
Jeanne Fran├žoise Kayibanda, Swapnil Hiremath, Greg A Knoll, Dean Fergusson, Benjamin J W Chow, Wael Shabana, Ayub Akbari
BACKGROUND: Contrast-induced acute kidney injury is a common cause of iatrogenic acute kidney injury (AKI). Most of the published estimates of AKI after contrast use originate from the cardiac catheterization literature despite contrast-enhanced computed tomography (CT) scans being the more common setting for contrast use. This systematic review aims to summarize the current evidence about (1)the risk of AKI following intravenous (IV) contrast-enhanced CT scans and(2) the risk of clinical outcomes (i...
August 22, 2014: Systematic Reviews
Jennifer M Renaud, Ilias Mylonas, Brian McArdle, Taylor Dowsley, Kathy Yip, Eric Turcotte, Jean Guimond, Mikael Trottier, Philipe Pibarot, Conor Maguire, Lucille Lalonde, Karen Gulenchyn, Gerald Wisenberg, R Glenn Wells, Terrence Ruddy, Benjamin Chow, Rob S B Beanlands, Robert A deKemp
UNLABELLED: Rubidium-ARMI ((82)Rb as an Alternative Radiopharmaceutical for Myocardial Imaging) is a multicenter trial to evaluate the accuracy, outcomes, and cost-effectiveness of low-dose (82)Rb perfusion imaging using 3-dimensional (3D) PET/CT technology. Standardized imaging protocols are essential to ensure consistent interpretation. METHODS: Cardiac phantom qualifying scans were obtained at 7 recruiting centers. Low-dose (10 MBq/kg) rest and pharmacologic stress (82)Rb PET scans were obtained in 25 patients at each site...
January 2014: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
Gary R Small, Terrence D Ruddy, Oana Simion, Mohammed Alam, Lyanne Fuller, Li Chen, Rob S Beanlands, Benjamin J W Chow
BACKGROUND: In 2009, the Chalk River nuclear reactor closed for repairs that led to a critical shortage of technetium-99m (Tc-99m). Several centers used thallium-201 (Tl-201) as an alternative radiotracer for myocardial perfusion imaging. Because Tl-201 is considered by many as a suboptimal radiotracer, we sought to understand the impact of using Tl-201 (during the Tc-99m shortage) on downstream resource utilization. METHODS AND RESULTS: We performed a retrospective study at the Ottawa Heart Institute of 7402 patients (60% men; mean age, 62...
September 2013: Circulation. Cardiovascular Imaging
Arun Abraham, Graham Nichol, Kathryn A Williams, Ann Guo, Robert A deKemp, Linda Garrard, Ross A Davies, Lloyd Duchesne, Haissam Haddad, Benjamin Chow, Jean DaSilva, Rob S B Beanlands
UNLABELLED: (18)F-FDG PET may assist decision making in ischemic cardiomyopathy. The PET and Recovery Following Revascularization (PARR 2) trial demonstrated a trend toward beneficial outcomes with PET-assisted management. The substudy of PARR 2 that we call Ottawa-FIVE, described here, was a post hoc analysis to determine the benefit of PET in a center with experience, ready access to (18)F-FDG, and integration with clinical teams. METHODS: Included were patients with left ventricular dysfunction and suspected coronary artery disease being considered for revascularization...
April 2010: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
Benjamin J W Chow, James W Wong, Keiichiro Yoshinaga, Terrence D Ruddy, Kathryn Williams, Robert A deKemp, Jean DaSilva, Rob S Beanlands
UNLABELLED: Recent studies have shown that vasodilator-induced ischemic electrocardiographic (ECG) changes have incremental prognostic value over normal SPECT myocardial perfusion imaging (MPI) and identify patients at higher risk for cardiac events. The prognostic value of vasodilator-induced ischemic ECG changes in the setting of normal PET MPI has yet to be determined. We sought to determine the prognostic importance of dipyridamole-induced ischemic ECG changes in patients with normal 82Rb PET myocardial perfusion images...
July 2005: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
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