Tl-201 myocardial SPECT in patients with systemic arterial diseases

Area of Science:

• Cardiovascular Imaging
• Nuclear Cardiology
• Arterial Diseases

Background:

• Coronary artery disease evaluation is crucial in patients with systemic arterial inflammatory and occlusive conditions.
• Arteriosclerosis obliterans (ASO), abdominal aortic aneurysm (AAA), and Takayasu arteritis (TA) are distinct vascular diseases that may affect coronary perfusion.
• The utility of Thallium-201 myocardial SPECT in assessing coronary artery disease in these specific patient populations requires clarification.

Purpose of the Study:

• To compare the diagnostic performance of Thallium-201 myocardial SPECT in patients with ASO, AAA, and TA.
• To evaluate the extent and significance of myocardial perfusion abnormalities in these patient groups using SPECT.
• To determine the clinical utility of Tl-201 myocardial SPECT for coronary artery disease assessment in ASO, AAA, and TA.

Main Methods:

• Retrospective analysis of 23 patients (9 ASO, 8 AAA, 6 TA) who underwent Tl-201 myocardial SPECT with stress testing.
• Qualitative assessment of myocardial perfusion defects.
• Quantitative analysis of segmental Tl-201 uptake.

Main Results:

• Qualitative analysis indicated the most significant myocardial perfusion decrease in ASO patients, followed by AAA, and minimally in TA.
• Quantitative analysis revealed significantly lower segmental Tl-201 uptake in ASO compared to TA (4 segments), AAA compared to TA (2 segments), and ASO compared to AAA (2 segments).
• Marked abnormalities were observed in Tl-201 myocardial SPECT for patients with ASO and AAA.

Conclusions:

• Tl-201 myocardial SPECT is a valuable tool for detecting coronary artery disease abnormalities in patients with ASO and AAA.
• The procedure is recommended for patients diagnosed with ASO and AAA to evaluate for coronary involvement.
• The role of Tl-201 myocardial SPECT is limited in patients with TA due to minimal observed myocardial perfusion abnormalities.