Effect of treadmill exercise testing on P wave duration and dispersion in patients with isolated myocardial bridging
Küçük Resim Yok
Tarih
2009
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Several previous studies suggest that myocardial bridging (MB) is associated with ischemia and rhythm disturbances. We sought to examine exercise-induced changes in P wave duration and dispersion (PWD), the markers of atrial conduction abnormalities in patients with isolated MB of left anterior descending artery (LAD) and control subjects. Eighteen patients with MB of LAD (group-I) and 22 subjects with angiographically demonstrated normal coronary arteries (group-II) underwent treadmill exercise testing. Before and after exercise ECG was recorded at a paper speed of 50 mm/s. The change in maximum and minimum P wave duration was measured manually and difference between two values was defined as PWD. There was no difference between two groups in terms of demographic properties. Baseline maximum and minimum P wave duration and PWD durations were similar in both groups and they did not change after exercise. (Group-I: before and after test; 114 +/- A 10 vs. 114 +/- A 9, 66 +/- A 13 vs. 67 +/- A 10, and 47 +/- A 9 vs. 45 +/- A 13 ms, P > 0.05, group-II; 113 +/- A 9 vs. 115 +/- A 8, 68 +/- A 11 vs. 68 +/- A 11, 45 +/- A 11 vs. 48 +/- A 15 ms for each, respectively). In addition there was no significant correlation between PWD and P wave duration and echocardiographic variables. In patients with MB of LAD, PWD and P wave duration were not different than healthy subjects and treadmill exercise testing did not induce atrial conduction abnormalities in both groups.
Açıklama
Anahtar Kelimeler
Isolated myocardial bridging, P wave dispersion and arrhythmia
Kaynak
International Journal of Cardiovascular Imaging
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
25
Sayı
5
