Abstract：Objective To analyze the morphologic changes of preexcitation waves in patients with manifest preexcitation syndrome after treadmill exercise test(TET). Methods One hundred and sixty 15-40 year old patients with manifest preexcitation syndrome were selected. The morphologic changes of preexcitation waves were observed during the process of TET, and the proportion of disappeared preexcitation waves was recorded and analyzed. Results The total proportion of disappeared preexcitation waves was 12.5% after TET in patients with manifest pre-excitation syndrome. The secondary ST-T changes returned to normal with the disappearance of preexcitation waves. The ratio of disappeared pre-excitation waves in type A pre-excitation syndrome group was significantly higher than that in type B pre-excitation syndrome group. Conclusion With heart rate increases after TET, preexcitation waves may disappear in parts of patients with manifest pre-excitation syndrome.
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2016, Vol. 25 
