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[A case of dilated cardiomyopathy with early back-diffusion of 123I-BMIPP]
S Yoshida1, H Kobayashi, N Iguchi
1Department of Radiology, Tokyo Women's Medical College, Japan.
Insights
Idiopathic dilated cardiomyopathy can show early back-diffusion of 123I-BMIPP, indicating abnormal fatty acid metabolism. This finding may serve as a diagnostic marker for this heart condition.
Area of Science:
- Cardiology
- Nuclear Medicine
- Biochemistry
Background:
- Idiopathic dilated cardiomyopathy (IDCM) is a significant cause of heart failure.
- Accurate diagnosis and monitoring of metabolic changes are crucial for managing IDCM.
Observation:
- A 28-year-old woman presented with cardiomegaly and left ventricular hypokinesis.
- Coronary angiography was normal, and left ventriculography showed reduced ejection fraction (40%).
- Myocardial biopsy confirmed IDCM.
Findings:
- Thallium-201 (201Tl) scintigraphy revealed left ventricular dilatation and inhomogeneous tracer uptake.
- 123I-BMIPP SPECT showed initial accumulation followed by reduced uptake and early back-diffusion in the inferior segment.
- These imaging findings suggest altered fatty acid metabolism in the myocardium.
Implications:
- Early back-diffusion of 123I-BMIPP may serve as a novel imaging biomarker for abnormal fatty acid metabolism in IDCM.
- This could lead to improved diagnostic strategies and personalized treatment approaches for patients with dilated cardiomyopathy.
Abstract:
A 28-year-old woman was pointed out cardiomegaly and diffuse hypokinesis of left ventricle by ultrasonography in community hospital. Coronary angiography showed normal coronary artery and, left ventriculography revealed diffuse hypokinesis (LVEF 40%). She was diagnosed idiopathic dilated cardiomyopathy by myocardial biopsy and other clinical information. Myocardial scintigraphy with 201Tl. revealed dilatation of left ventricle and diffuse inhomogeneous accumulation of 201 Tl. Dynamic 123I-BMIPP SPECT image 2 minutes after injection showed BMIPP accumulation in all segment, though, static image 15 minutes after injection indicated reduced BMIPP accumulation. These findings suggested existence of the early back-diffusion in inferior segment. Early back-diffusion of BMIPP may become a marker of abnormal fatty acid metabolism in patient with dilated cardiomyopathy.