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[Influence of obstructive sleep apnea-hypopnea syndrome on the QTc interval].

OBJECTIVE
To investigate the influence of obstructive sleep apnea-hypopnea syndrome (OSAHS) on the QTc interval.


METHODS
By the polysomnograph,98 patients were divided into an obstructive sleep apnea-hypopnea syndrome group and a control group. We tested their 24 hour DCG and observed the difference of the heart rate,QT interval and QTc interval at the same time.


RESULTS
We compared the heart rate (76 +/- 10 bt/min), QT interval (366 +/- 30 ms), and QTc interval (404 +/- 45 ms) with those of the control group (73 +/- 96 bt/min, 342 +/- 31 ms, 374 +/- 30 ms, respectively). The QT interval and QTc interval significantly differred (P < 0.05).


CONCLUSION
The QT interval and QTc interval in the OSAHS group has been prolonged, suggesting OSAHS might be a high risk factor in arrhythmia and sudden death.