Assessment of Myocardial Viability Using Nuclear Medicine Imaging in Dextrocardia
Por um escritor misterioso
Descrição
Imaging of dextrocardia in humans requires an understanding of the orientation of the heart chambers and walls. There are many types of cardiac malpositioning, such as dextrocardia (with or without situs inversus), mesocardia, and levocardia. Myocardial perfusion scintigraphy of dextrocardia has been explained in case reports and imaging atlases; however, myocardial viability assessment using nuclear medicine imaging techniques is less documented in the literature. Methods: In 2 cases of dextrocardia with situs inversus and 1 case of mesocardia, myocardial viability was assessed using 99mTc-sestamibi rest perfusion scintigraphy and 18F-FDG PET. Cardiac SPECT images of dextrocardia with situs inversus were acquired using the feet-first supine position with a 180° arc from left anterior oblique to right posterior oblique, whereas a right-lateral–to–left-lateral arc was used for mesocardia. The processing and reconstruction were done by entering the dataset for the feet-first supine position and repeating after entering the dataset for the feet-first prone position. The 2 sets of reconstructed images were compared for orientation of walls and cardiac chambers. Results: The first processing, using the feet-first supine position, revealed an interchanged septum and lateral wall in reconstructed images of dextrocardia with situs inversus. This interchange was corrected by changing the position to prone during processing of the rest perfusion and PET raw data. The display of cardiac slices in various axes matched the conventional nomenclature for the septum and lateral wall, leading to easy interpretation. However, this change was not required in the mesocardia, for which the location of the heart chambers was not interchanged. Conclusion: Because the acquisition protocol for SPECT is a semicircular orbit, the various types of dextrocardia require careful selection of the arc, with the patient positioning kept feet-first supine. Processing and reconstruction of data by changing the patient position to prone was found to be most useful method of matching the septum and lateral wall orientation for interpretation of images.
Reporting of Myocardial Perfusion Imaging Studies
Approach to Dextrocardia in Adults: Review
SPECT myocardial perfusion imaging in patients with Dextrocardia
PDF] Myocardial Perfusion SPECT Imaging in Dextrocardia with Situs Inversus: A Case Report
PDF) Myocardial Perfusion SPECT Imaging in Dextrocardia with Situs Inversus: A Case Report
Incidental Findings on Myocardial Perfusion SPECT Images
Assessment of Myocardial Viability in Patients with Heart Failure
Myocardial Viability Circulation Research
Predicting Benefit From Revascularization in Patients With Ischemic Heart Failure
Artifacts and Pitfalls in Myocardial Perfusion Imaging
PDF) Myocardial perfusion scintigraphy in a case of dextrocardia: Doing it “right”
Myocardial perfusion single photon computed tomography: An Atlas - ScienceDirect
Quantitative Clinical Nuclear Cardiology, Part 1: Established Applications
de
por adulto (o preço varia de acordo com o tamanho do grupo)
