この研究は、虚血性心疾患の病歴のある男女の患者の心電図（ECG）パラメータに携帯電話の高周波電磁界ばく露が影響を与えるか否かを調べた。被験者356人（男性129人と女性227人）は、心臓病の病歴のない対照群（第I群）、虚血性心疾患の患者群（第II群）、および心筋虚血に関連しない心臓病の病歴のある患者群（第III群）に分類された。携帯電話をベルトレベルまたは前胸部表面に装着した場合において、携帯電話の電源オフモード（ベースライン）およびオンモード（呼び出し音が40秒間鳴り続けた状態）の条件下で、各被験者のECGを記録し、データを電子的に分析した。その結果：QT間隔を心拍数で補正した補正QT間隔(QTc)の延長が、第IおよびIII群の男性群で有意に見られた；第II群の男性群では、QTc間隔の延長および電圧基準の変化が有意であった；これらの変化は、第II群の女性群では観察されなかった；携帯電話の位置（ベルトレベルまたは前胸部表面）による影響の違いが見られた、と報告している。
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To investigate the effects of an exposure to a radiofrequency field from a mobile phone on electrocardiographic parameters in patients with a history of ischemic heart diseases, taking gender into consideration.
A total number of 356 participants (129 males and 227 females) were admitted in this study. They were divided into the following groups: 1.) healthy subjects without heart diseases (n=142), 2.) patients with ischemic heart diseases (n=104) and 3.) patients with a history of heart diseases not related to myocardial ischemia (n=110).
After a stabilizing period of 10 minutes, the ECG was recorded without any cell phone (baseline). Then, a cell phone was placed on the left side of the lower abdomen at the belt level (belt level) and rang once for 40 seconds during ECG recording. After 5 minutes, the cell phone was placed in the left side chest pocket (precordial) and rang once for 40 seconds with simultaneous ECG recording.
| ばく露 | パラメータ |
|---|---|
|
ばく露1:
900 MHz
ばく露時間:
2 times for 40 seconds
|
- |
| 周波数 | 900 MHz |
|---|---|
| ばく露時間 | 2 times for 40 seconds |
| ばく露装置の詳細 | mobile phone placed on the left side of the lower abdomen at the belt level or in the left side chest pocket |
|---|
No parameters are specified for this exposure.
In healthy males, the ringing cell phone, placed at belt level, decreased the RR interval and increased the QT interval significantly compared to the baseline. The ringing cell phone in precordial position significantly prolonged the QT interval compared to the baseline. In healthy females, the ringing cell phone in precordial position led to an increase in the heart rate compared to the basis values.
In male probands with ischemic heart diseases, the duration of the QRS complex was significantly increased in both cell phone positions when compared to the baseline. Additionally, the QT interval and the R wave were significantly prolonged when the ringing cell phone was placed precordial in comparison to the baseline.
Male probands with heart diseases not related to myocardial ischemia showed significant prolongation of the QT interval when the ringing cell phone was placed in precordial position or in belt level in comparison to the baseline.
The authors conclude that a ringing cell phone prolonged the QT interval in men with and without ischemic heart diseases and that females are immune from these effects.
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