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Figure 4 Insulin Resistance and Abnormal Glucose Metabolism in Nonischemic Heart Failure Patients

Myocardial perfusion (left) and glucose uptake (right) in a patient with idiopathic dilated cardiomyopathy and insulin resistance, as assessed by ¹³N-ammonia (NH₃) and ¹⁸F-fluoro-2-deoxyglucose (FDG) positron emission tomographic imaging. Note the strong, consistent signal in the left ventricle for blood flow (solid arrow) compared with the weak, scattered signal for glucose uptake (dashed arrow), implying inefficient energy metabolism.

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