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Figure 5 Median changes in B-type natriuretic peptide (BNP) levels in response to exercise stress testing in patients with no ischemia (white bar), with no ischemia on scintigraphy but subsequently shown to have critical coronary disease (light gray bar), with mild-to-moderate ischemia (dark gray bar), and with severe ischemia (black bar). Numbers within each bar represent the number of patients in that group. The p values by each bar are for the median change. The p value at the far right is for the trend across ischemic categories. cath = cardiac catheterization; ECG = electrocardiographic; Immed = immediately; IQR = interquartile range; sx = symptoms.
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