Scintigraphic assessment of false left ventricular aneurysms

Area of Science:

• Cardiology
• Nuclear Medicine
• Medical Imaging

Background:

• Left ventricular aneurysms, true or false, can lead to serious complications post-myocardial infarction, including heart failure, arrhythmias, and emboli.
• False left ventricular aneurysms are characterized by myocardial rupture into the pericardium without pericardial breach, posing a high risk of fatal rupture.

Purpose of the Study:

• To evaluate the efficacy of combined gated cardiac blood pool scintigraphy and Thallium-201 myocardial perfusion scintigraphy in diagnosing false left ventricular aneurysms.
• To establish a noninvasive diagnostic method for false left ventricular aneurysms.

Main Methods:

• Four patients with congestive heart failure underwent gated cardiac blood pool scintigraphy.
• Angiography or surgery confirmed the diagnosis of false left ventricular aneurysms.
• Thallium-201 rest myocardial perfusion scintiscans were performed in two patients.

Main Results:

• Gated cardiac blood pool scintiscans revealed discrete paraventricular chambers with narrow connections to the left ventricle in all four patients.
• Thallium-201 scintigraphy showed perfusion defects corresponding to the aneurysm neck in one patient and a larger defect in another.
• The findings were confirmed by angiography or surgical intervention.

Conclusions:

• Combined gated cardiac blood pool scintigraphy and 201Tl myocardial scintigraphy offer a reliable noninvasive approach for diagnosing false left ventricular aneurysms.
• Early diagnosis is crucial for preventing potentially fatal rupture through surgical intervention.