| The effects of exercise induced tachycardia on the maternal electrocardiogram. | |
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MedLine Citation:
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PMID: 8427835 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: To determine whether pregnancy has an effect on the maternal electrocardiographic response to stress. DESIGN: Eight maternal ECG parameters were screened before, during and after exercise induced tachycardia at 29 and 37 weeks gestation and at 6 weeks post partum for each participant. SETTING: General Hospital in Safed, Israel. SUBJECTS: Fifteen healthy, pregnant women aged 22 to 34 years with singleton pregnancies volunteered from the peripheral antenatal clinics. INTERVENTION: Exercise stress tests were performed on a Quinton 3000 treadmill stress test system according to a Modified Bruce Protocol, producing a heart rate of 85% of age predicted maximum. MAIN OUTCOME MEASURES: The ST-segment, T-wave, QRS complex, axis, rhythm, disorders of impulse conduction, the P-Q and Q-T intervals were screened before, during and after the exercise test. RESULTS: The study results suggest an increase in the ST-segment changes induced by stress at 37 weeks of pregnancy compared to 29 weeks (ST-depression in 6 women out of 15 versus 2, P = 0.125, McNemar's Test for Correlated Proportions-Exact Test, two tailed; 95% CI, 0.042-0.492, 0.01 < P < 0.05) and to the post partum test (ST-depression in 6 women out of 15 versus 1, P = 0.125; 0.029-0.637, 0.01 < P < 0.05). No significant alteration of the other ECG parameters. No significant correlation between blood haemoglobin level, serum levels of sodium, potassium, calcium, glucose and 17 beta-oestradiol with the appearance of the ECG change. CONCLUSIONS: The increase in the exercise induced ST-segment abnormalities at 37 weeks of pregnancy may be another physiological effect of late pregnancy which has not been demonstrated previously. |
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Authors:
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U A Asher; I Ben-Shlomo; M Said; H Nabil |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: British journal of obstetrics and gynaecology Volume: 100 ISSN: 0306-5456 ISO Abbreviation: Br J Obstet Gynaecol Publication Date: 1993 Jan |
Date Detail:
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Created Date: 1993-03-09 Completed Date: 1993-03-09 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 7503752 Medline TA: Br J Obstet Gynaecol Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 41-5 Citation Subset: AIM; IM |
Affiliation:
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Department of Obstetrics and Gynaecology, Rebecca Sieff Hospital, Safed, Israel. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Electrocardiography Exercise Test Female Heart / physiology Heart Rate / physiology* Humans Physical Exertion / physiology* Pregnancy / physiology* Pregnancy Complications, Cardiovascular / physiopathology |
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