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Updated: Jul 13, 2026

In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography
Published on: February 16, 2016
Right ventricular wall "ischemia" findings using a dual isotope protocol
Ivana Moura Abuhid1, Nilton Alves de Rezende
1Clinical Nuclear Laboratory, Federal University of Minas Gerais, Minas Gerais, Brazil.
This study highlights right ventricular failure in a patient with diabetes and hypertension, revealing significant right ventricular dilatation and hypertrophy. Diagnostic imaging identified a right ventricular "perfusion abnormality" suggesting ischemia.
Area of Science:
- Cardiology
- Nuclear Cardiology
- Echocardiography
Background:
- A 74-year-old male with diabetes and hypertension presented with symptoms of right ventricular failure.
- Clinical presentation included jugular venous distension, hepatomegaly, and lower extremity edema.
Observation:
- Echocardiography revealed normal left ventricular function, dilated right atrium and ventricle, severe tricuspid regurgitation, pulmonary hypertension, and an atrial septal defect.
- Myocardial perfusion SPECT imaging demonstrated severe right ventricular dilatation and hypertrophy without left ventricular ischemia.
Findings:
- A right ventricular "perfusion abnormality" was observed on dual-isotope SPECT (Tl-201 rest/Tc-99m MIBI stress) but not on single-isotope studies.
- Coronary angiography showed diffuse coronary atherosclerosis without significant obstructive lesions.
Implications:
- The findings suggest potential right ventricular ischemic changes not detected by standard coronary angiography.
- Dual-isotope SPECT may offer improved detection of right ventricular perfusion abnormalities in specific clinical contexts.
- Further investigation into the etiology of right ventricular dysfunction in this patient is warranted.
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