Korean J Aerosp Environ Med.  2003 Jun;13(2):88-90.

Characteristics of QT Dispersion during Recovery Phase after Treadmill Exercise in Airlines Pilots

• Cho HP
• Lim HK
• Lee JU
• Lee SJ
• Lee J
• Shin JH
• Lee JW
• Kim KS
• Kim SG
• Kim JH
• Lee BH

Abstract

BACKGROUND
QT dispersion (QTD) represents the inhomogeneity of ventricular repolarization and has been suggested to predict ventricular arrhythmia in patients with coronary artery disease. The purpose of this article is to study the characteristics of QTD during recovery phase after maximal treadmill exercise in airlines pilots.
METHODS
The study population included 45 healthy airlines pilots. QTpeak D (QTpD) was defined as the difference between maximum and minimum QTp interval measured on 12 lead ECG at single cardiac beat. Paired t test was used between QTpD at rest and QTpD during recovery phase after maximal treadmill exercise.
RESULTS
The QTpD at early recovery phase (1 minute) after maxial treadmill exercise was significantly decreased compared to QTpD at rest (22+/-11 msec. vs 27+/-12 msec., P<0.05), but there was no significant difference between QTpD at rest and QTpD at late recovery phases (3 minutes, 5 minutes and 7 minutes).
CONCLUSION
This finding suggests that antiarrhythmogenic effect is present at early recovery phase (1 minute) after maxial treadmill exercise in healthy airlines pilots.

Keyword

QTpeak Dispersion; Recovery phase; Treadmill exercise; Airlines pilot

MeSH Terms

Arrhythmias, Cardiac
Coronary Artery Disease
Electrocardiography
Humans