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Myocardial visualization on a perfusion lung scan.

H S Weissmann, R M Steingart, T M Kiely

    Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
    |August 1, 1980
    PubMed
    Summary
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    Myocardial activity was detected on a lung scan in a patient with primary pulmonary hypertension and a patent foramen ovale. This finding suggests potential cardiac involvement in pulmonary hypertension cases with shunting.

    Area of Science:

    • Cardiology
    • Nuclear Medicine
    • Pulmonary Hypertension

    Background:

    • Primary pulmonary hypertension (PPH) is a severe condition characterized by high blood pressure in the pulmonary arteries.
    • Right-to-left shunting can occur in PPH due to increased pulmonary vascular resistance, leading to deoxygenated blood bypassing the lungs.

    Observation:

    • Myocardial activity was incidentally observed on a lung scintigraphy scan.
    • The scan was performed after intravenous administration of Technetium-99m macroaggregated albumin (Tc-99m MAA).

    Findings:

    • The patient presented with primary pulmonary hypertension.
    • A functionally patent foramen ovale was identified, causing a right-to-left shunt.

    Implications:

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    • Incidental myocardial uptake in lung scans may warrant further cardiac evaluation in patients with PPH.
    • Understanding shunt physiology is crucial for managing complex cardiovascular conditions like PPH.