Abstract
Myocardial perfusion scintigraphy: interpretation of a normal scan
Highlights
A number of imaging modalities are available to non-invasively evaluate patients with suspected or known coronary artery disease (CAD), myocardial perfusion scintigraphy (MPS) with single photon emission computed tomography (SPECT) has been the workhorse for this purpose for over decades [1]
Alternative imaging parameters may aid in further risk stratification of a normal MPS
Abidov et al explored the prognostic value of Transient ischaemic dilation (TID) in patients with a completely normal MPS and identified TID as an independent prognostic factor with a threefold increase in event rate [5]
Summary
A number of imaging modalities are available to non-invasively evaluate patients with suspected or known coronary artery disease (CAD), myocardial perfusion scintigraphy (MPS) with single photon emission computed tomography (SPECT) has been the workhorse for this purpose for over decades [1]. Alternative imaging parameters may aid in further risk stratification of a normal MPS. Transient ischaemic dilation (TID) has been linked to extensive CAD due to post-stress LV dysfunction, as a result of stunning and/or diffuse subendocardial hypoperfusion, which mimics LV enlargement by reduced subendocardial tracer uptake during stress.
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