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(A) Distribution of patients with pathologic vs uneventful ETT compared with pathologic vs uneventful ACh test, showing that patients with pathologic ETT significantly more often had a pathologic ACh test (P = 0.034). (B) Distribution of doses of ACh needed to elicit a coronary vasomotor disorder. Abbreviations: ACh, acetylcholine; ETT, exercise tolerance (stress) test.
