Aging Effects on Cardiac and Respiratory Dynamics in Healthy Subjects across Sleep Stages

被引:88
作者
Schumann, Aicko Y. [1 ,2 ]
Bartsch, Ronny P. [3 ,4 ]
Penzel, Thomas [5 ]
Ivanov, Plamen Ch. [3 ,4 ,6 ,7 ]
Kantelhardt, Jan W. [1 ]
机构
[1] Univ Halle Wittenberg, Inst Phys, D-06120 Halle, Saale, Germany
[2] Univ Calgary, Dept Phys & Astron, Complex Sci Grp, Calgary, AB T2N 1N4, Canada
[3] Harvard Univ, Sch Med, Boston, MA USA
[4] Brigham & Womens Hosp, Div Sleep Med, Boston, MA 02115 USA
[5] Charite, Schlafmed Zentrum, Berlin, Germany
[6] Boston Univ, Dept Phys, Boston, MA 02215 USA
[7] Boston Univ, Ctr Polymer Studies, Boston, MA 02215 USA
关键词
Sleep; aging; heart rate variability; respiration; cardiac risk; detrended fluctuation analysis; scaling; phase rectified signal averaging; deceleration capacity; HEART-RATE-VARIABILITY; ACUTE MYOCARDIAL-INFARCTION; DETRENDED FLUCTUATION ANALYSIS; RANGE TEMPORAL CORRELATIONS; LEFT-VENTRICULAR FUNCTION; SCALING BEHAVIOR; FRACTAL DYNAMICS; NOCTURNAL SLEEP; GROWTH-HORMONE; REM-SLEEP;
D O I
10.1093/sleep/33.7.943
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Study Objectives: Respiratory and heart rate variability exhibit fractal scaling behavior on certain time scales. We studied the short-term and long-term correlation properties of heartbeat and breathing-interval data from disease-free subjects focusing on the age-dependent fractal organization. We also studied differences across sleep stages and night-time wake and investigated quasi-periodic variations associated with cardiac risk. Design: Full-night polysomnograms were recorded during 2 nights, including electrocardiogram and oronasal airflow. Setting: Data were collected in 7 laboratories in 5 European countries. Participants: 180 subjects without health complaints (85 males, 95 females) aged from 20 to 89 years. Interventions: None. Measurements and Results: Short-term correlations in heartbeat intervals measured by the detrended fluctuation analysis (DFA) exponent alpha(1) show characteristic age dependence with a maximum around 50-60 years disregarding the dependence on sleep and wake states. Long-term correlations measured by alpha(2) differ in NREM sleep when compared with REM sleep and wake, besides weak age dependence. Results for respiratory intervals are similar to those for alpha(2) of heartbeat intervals. Deceleration capacity (DC) decreases with age; it is lower during REM and deep sleep (compared with light sleep and wake). Conclusion: The age dependence of alpha(1) should be considered when using this value for diagnostic purposes in post-infarction patients. Pronounced long-term correlations (larger alpha(2)) for heartbeat and respiration during REM sleep and wake indicate an enhanced control of higher brain regions, which is absent during NREM sleep. Reduced DC possibly indicates an increased cardiovascular risk with aging and during REM and deep sleep.
引用
收藏
页码:943 / 955
页数:13
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