Abstract
We describe a patient with pulmonary emphysema who developed paradoxical cardiodeceleration not only during incremental exercise associated with hypoxemia but also during progressive hypoxic challenge. Since coronary angiogram revealed no abnormality, this unique phenomenon seemed to be due to the direct effect of hypoxia on the sinus node activity.
MeSH terms
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Bradycardia / etiology
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Bradycardia / physiopathology*
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Carbon Dioxide / analysis
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Exercise Test
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Heart Rate / physiology
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Humans
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Hypercapnia / physiopathology
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Hypoxia / complications
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Hypoxia / physiopathology*
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Male
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Middle Aged
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Oxygen / blood
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Physical Exertion / physiology*
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Pulmonary Emphysema / complications
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Pulmonary Emphysema / physiopathology*
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Sinoatrial Node / physiopathology*
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Tidal Volume