Publications by authors named "Oluyemi B Aboyewa"
Myocardial Blood Flow Quantification in Patients with an Implanted Cardiodefibrillator during Stress and at Rest using a Wideband Perfusion Pulse Sequence: An Initial Feasibility Study.
J Cardiovasc Magn Reson
September 2025
Background: Although a recently developed wideband perfusion sequence has shown diagnostically acceptable image quality and accurate myocardial blood flow (MBF) quantification at rest in patients with cardiac implanted electronic devices (CIEDs), its performance during vasodilator stress remains unproven. This study aims to determine whether the sequence produces diagnostically acceptable image quality during stress and is capable of quantitatively detecting abnormal stress MBF and myocardial perfusion reserve (MPR) in patients with implanted cardiodefibrillators (ICDs).
Methods: We enrolled 29 patients with an ICD (mean age = 63 ± 15 years, 17 males, 12 females) and 11 control patients (mean age = 50 ± 17 years, 6 males, 5 females; negative coronary artery disease; negative stress perfusion CMR; and no cardiac event one year post CMR) with an ICD taped below the left clavicle to mimic image artifacts.
Article Synopsis
- The study investigates how cardiac implantable electronic devices (CIEDs) affect the accuracy and precision of phase-contrast MRI measurements of aortic velocity in both adult and pediatric patients.
- A total of 29 subjects (21 adults and 8 children) were scanned using various MRI techniques while simulating the presence of CIEDs to analyze image artifacts.
- Results showed that the proximity of the CIED to the aortic valve worsens measurement accuracy, with biases and variations increasing as the distance decreases, highlighting the need to consider CIED impact during MRI readings.
Cumulative radiation dose from medical imaging in paediatric congenital heart disease patients with epicardial cardiac implantable electronic devices.
Eur Heart J Imaging Methods Pract
January 2024
Aims: To determine whether paediatric congenital heart disease (CHD) patients with epicardial cardiac implantable electronic devices (CIEDs) receive high cumulative effective doses (CEDs) of ionizing radiation from medical imaging tests.
Methods And Results: We compared 28 paediatric CHD patients with epicardial CIEDs (cases) against 40 patients with no CIED matched by age at operation, sex, surgical era, and CHD diagnosis (controls). We performed a retrospective review of radiation exposure from medical imaging exams between 2006 and 2022.