Exercise Provocation Test in Patients with Vasospastic Angina: Graded vs. Non-Graded Exercise Test

摘要

Background and Objectives We investigated in patients with coronary vasospastic angina whether the exercise ECG test results are influenced by the different modes of exercise load and compared the clinical characteristics including coronary risk factors between patients with positive and negative exercise tests. Material and Methods This study comprised 34 patients with documented coronary artery spasm without significant stenosis (coronary artery luminal diameter narrowing Results 1) Of 29 patients who underwent both GET and NGET, 19 patients manifested positive result by NGET, whereas only 11 patients did by GET (66 vs. 38%, P=0.04). All patients with positive GET had positive NGET and 8 of 18 patients with negative GET had positive NGET. 2) Of 34 patients who underwent GET, there was no significant difference in frequency of hypertension, diabetes, current smoking, presence of effort chest pain by history, mixed disease (fixed stenosis >50%, Conclusion In patients with coronary vasospastic angina, sudden rapid exercise could induce more frequently coronary artery spasm than multistage exercise. The result of an exercise test may not be correlated with coronary risk factors, coronary anatomy, effort chest pain, and the disease activity.