While an acute pulmonary embolism requires emergency care, ongoing changes from previous clots can remain in the pulmonary vessels. These may go unrecognised and affect lung circulation over time. An MRI may show changes in pulmonary vessels consistent with prior clot events. Identifying chronic pulmonary vascular changes allows for monitoring and management that may help prevent further complications. CT pulmonary angiography is the preferred tool for acute PE, however MRI can show chronic vascular changes.
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