Prospective evaluation of the utility of magnetic resonance imaging in patients with non-MRI-conditional pacemakers and defibrillators.

Background: Magnetic resonance imaging (MRI) in patients with legacy cardiovascular implantable electronic devices (CIEDs) in situ is likely underutilized. We hypothesized the clinical benefit of MRI would outweigh the risks in legacy CIED patients.

Methods: This is a single-center retrospective study that evaluated and classified the utility of MRI using a prospectively maintained database.

Safety of thoracic magnetic resonance imaging for patients with pacemakers and defibrillators.

Background: During magnetic resonance imaging (MRI), cardiac implantable electronic device (CIED) leads can be antennae to focus energy onto myocardium, leading to heating and arrhythmias. Clinical data on thoracic MRI safety for patients with legacy devices are limited.

Objective: The purpose of this study was to identify patients undergoing thoracic MRI with legacy devices, compare the incidence of adverse events of those patients with control patients undergoing brain MRI with legacy devices, and compare paired cardiac troponin T (cTnT) values.

Mortality After Magnetic Resonance Imaging of the Brain in Patients With Cardiovascular Implantable Devices.

Background: Use of magnetic resonance imaging (MRI) brain is restricted in patients with cardiovascular implantable electronic devices (CIEDs). We proposed to determine whether mortality difference exists for patients with non-MRI-conditional CIEDs undergoing brain MRI compared with controls.

Methods And Results: Retrospective analysis of prospectively collected data was performed to compare all-cause mortality in patients with CIEDs undergoing brain MRI (CIED-MRI) with 3 control groups matched for age, sex, imaging year, and type of CIED: (1) no CIED, brain MRI (no-CIED-MRI); (2) CIED, brain computerized tomography (CT) scan (CIED-CT); and (3) no CIED, brain CT (no-CIED-CT).

Safety of magnetic resonance imaging in patients with legacy pacemakers and defibrillators and abandoned leads.

Background: During magnetic resonance imaging (MRI), abandoned leads may act as antennae that result in tissue heating and arrhythmia induction.

Objective: The purpose of this study was to assess the safety of MRI in patients with abandoned leads, with the addition of cardiac troponin T (cTnT) assessment to screen for myocardial damage.

Methods: We reviewed our prospectively collected database of patients with cardiovascular implantable electronic devices (CIEDs) undergoing MRI between 2008 and 2017 at Mayo Clinic, Rochester, MN, and selected patients who had abandoned leads.

Age-related changes in the pancreas identified by EUS: a prospective evaluation.

Background: EUS is an important modality for the diagnosis of pancreatic disease. An understanding of normal pancreatic ductal and parenchymal variation in asymptomatic individuals is essential to improve EUS accuracy. The primary aim of this study was to determine age-related pancreatic parenchymal and ductular changes identifiable on EUS in individuals with no history or symptoms of pancreaticobiliary disease.

Evaluation of a new curved linear array echoendoscopy system for EUS.

Background: EUS-FNA can be used to accurately diagnose and stage GI and pulmonary neoplasms. This study evaluated the performance characteristics of a new compact linear EUS system during EUS-FNA.

Methods: A total of 37 patients enrolled in this prospective pilot study underwent clinically indicated EUS-FNA and/or celiac plexus neurolysis with the compact EUS system.

Prospective risk assessment of bacteremia and other infectious complications in patients undergoing EUS-guided FNA.

Background: There are few data regarding the risk of bacteremia with EUS-guided FNA. This study prospectively evaluated the frequency of bacteremia and other infectious complications after EUS-guided FNA.

Methods: Patients referred for EUS-guided FNA of the upper GI tract lesions were considered for enrollment.

Preliminary experience with an EUS-guided trucut biopsy needle compared with EUS-guided FNA.

Background: EUS-guided FNA is a sensitive method for the diagnosis of malignancy. However, EUS-FNA is often laborious and usually requires the presence of a cytopathologist or cytotechnician. The development of an EUS-guided Trucut biopsy (EUS-TCB) needle may simplify the procedure and expand the application of EUS-directed procurement of biopsy specimens.

Evaluation of indeterminate bile duct strictures by intraductal US.

Background: Cholangiography and tissue sampling (brush cytology, biopsy) are the standard nonsurgical techniques for determining whether a bile duct stricture is benign or malignant. The aim of this study was to determine whether intraductal US is of assistance in distinguishing benign from malignant biliary strictures.

Methods: A retrospective review was undertaken of 30 patients with indeterminate bile duct strictures who underwent ERCP and tissue sampling from September 1999 to November 2000.

Initial experience with EUS-guided trucut needle biopsies of perigastric organs.

Background: The aims of this study were to determine the feasibility, safety, and yield of a 19-gauge EUS-guided-trucut needle for obtaining biopsy specimens of perigastric organs.

Methods: The study was performed in swine under general anesthesia. EUS-guided trucut needle biopsy specimens were obtained from the spleen, liver, pancreas body, and left kidney.

A prospective, blinded assessment of the impact of preoperative staging on the management of rectal cancer.

Background & Aims: The influence of preoperative staging of rectal carcinoma on therapeutic decisions is uncertain. The use of fine-needle aspiration (FNA) of perirectal nodes in this setting has not been evaluated. The aim of this prospective, blinded study of patients with rectal cancer was to assess the impact of preoperative staging on treatment decisions and compare the tumor (T), nodal (N) staging performance characteristics of pelvic computed tomography (CT), rectal endoscopic ultrasonography (EUS), and EUS FNA.