Abstract：
:Respiratory sinus arrhythmia (RSA) is the beat-to-beat fluctuation in heart rate at the frequency of the respiratory cycle. While it is common to study RSA under conditions of controlled breathing, where respiratory frequency, and sometimes tidal volume and inspiratory:expiratory ratio are controlled, the effect of controlled breathing on RSA is not clear. While not all studies exploring the effects of controlled breathing on RSA magnitude are consistent, some of the best-designed studies addressing this question did find a significant effect. In addition to respiratory timing influencing heartbeats, there is evidence that cardiac timing also influences respiratory timing, termed cardioventilatory coupling. Thus, the timing interactions between the cardiac and respiratory systems are complex, and bi-directional. Controlled breathing eliminates one aspect of this relationship, and studies designed to understand cardiorespiratory physiology conducted under these conditions need to be interpreted with an understanding that they may not represent normal physiology.
journal_name
Respir Physiol Neurobioljournal_title
Respiratory physiology & neurobiologyauthors
Larsen PD,Tzeng YC,Sin PY,Galletly DCdoi
10.1016/j.resp.2010.04.021subject
Has Abstractpub_date
2010-11-30 00:00:00pages
111-8issue
1-2eissn
1569-9048issn
1878-1519pii
S1569-9048(10)00157-6journal_volume
174pub_type
杂志文章,评审abstract：:Embolus occlusion of pulmonary arteries can result in elevated pulmonary blood pressures, often resulting in pulmonary hypertension (PH). Experimental observations have shown that small emboli (diameter <170 μm) can have a disproportionate effect on pulmonary vascular resistance (PVR) compared with larger emboli for t...
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journal_title：Respiratory physiology & neurobiology
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journal_title：Respiratory physiology & neurobiology
pub_type： 杂志文章
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journal_title：Respiratory physiology & neurobiology
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journal_title：Respiratory physiology & neurobiology
pub_type： 杂志文章
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journal_title：Respiratory physiology & neurobiology
pub_type： 杂志文章
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pub_type： 杂志文章,评审
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journal_title：Respiratory physiology & neurobiology
pub_type： 杂志文章
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更新日期：2004-07-20 00:00:00
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pub_type： 杂志文章
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journal_title：Respiratory physiology & neurobiology
pub_type： 杂志文章
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更新日期：2005-05-12 00:00:00
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journal_title：Respiratory physiology & neurobiology
pub_type： 杂志文章,评审
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更新日期：2008-12-10 00:00:00
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journal_title：Respiratory physiology & neurobiology
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journal_title：Respiratory physiology & neurobiology
pub_type： 社论,评审
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