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Fig. 12 | Insights into Imaging

Fig. 12

From: The emerging role of magnetic resonance imaging and multidetector computed tomography in the diagnosis of dilated cardiomyopathy

Fig. 12

Relation between myocardial substrate and functional response during low-dose and high-dose dobutamine stress in an animal model with chronic myocardial ischaemia. Whereas contractility gradually increases with increasing doses of dobutamine in normal, remote myocardium, the response to stress is blunted in chronic ischaemic but viable (no MI) segments. The response to dobutamine stress in segments containing scarred myocardium depends on the degree of transmurality, being worse in segments with a scar transmurality of more than 50% (MI++) (Ming Wu, adapted from [66])

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