| Title | [Obstructive sleep apnea-hypopnea syndrome (osahs) and changes in heart rhythm] | | Author(s) | Catarino A, Lopes C, Santos L, Pires E, Matos M | | Institution | Allergologic and Pneumologic Science Department. | | Source | Rev Port Pneumol 2003 Nov; IX(5 Suppl 1):50-51. | | Abstract | The changes in heart rhythm associated with OSAHS include sinusal arrhythmia, severe bradycardia and ventricular and supraventricular tachycardia. It is well known the risk of sudden death, particularly of cardiovascular cause.The objective of this study was evaluate the frequency and the type of changes in heart rhythm and correlate the severity of OSAHS with the severity of the arrhythmia.60 patients were studied (51 males; 9 females) with OSAHS and no changes in heart rhythms in awake ECG, that performed "split-night" polysomnography in our laboratory.The physiological disturbances of severity: apnea-hypopnea index (AHI), dessaturation index, minimal values of SaO2 before and post Continuous Positive Airway Pressure (CPAP) were correlated with the changes in heart rhythm and the variance of the heart rate. The most frequent changes in heart rhythm were bradytachycardiac episodes (72%) with strong correlation with minimal SaO2 but not with AHI. Second degree Mobitz II atrioventricular block was observed in 5% of the patients, with a strong and direct correlation with the mean time of apnea.In this study the analyse of the standard deviation of the heart rate, showed statistical correlation with the majority of the parameters analysed: positively for the mean time of apnea on REM and NREM and for the AHI and inversely with the mean SaO2 on REM and NREM and with minimal SaO2 on REM.After CPAP we documented, as expected, a significant reduction of respiratory and cardiac changes.The results of this study are superpose to the references in the literature, nevertheless the severity of the changes of heart rhythm correlated better with the minimal value of SaO2 and the mean time of apnea than with AHI. | | Language | POR | | Pub Type(s) | JOURNAL ARTICLE
| | PubMed ID | 15264100 |
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