Former studies revealed a distinct pattern of changes in circulation during deliberate apnea. Blood pressure rises significantly often accompanied by bradycardia. Further studies confirmed a massive increase of total vascular resistance as it also happens in shock to maintain perfusion of heart, lung and brain. This study is to determine the exact alterations of the cardiac function during this reaction, show the redistribution of blood volume in apnea and evaluate possible longterm effects on the central nervous system caused by repeated apnea via magnetic resonance imaging.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
BASIC_SCIENCE
Masking
NONE
Enrollment
17
Cardiac Function: Duration of Apnea
Alteration of cardiac function in subjects undergoing maximum apnea.
Time frame: every minute under apnea (from 0 up to 9 minutes and rest) depending on personal best with a mean of 5 measurements
Mean Blood Flow Measurement Under Apnea Using MRI
Blood flow pattern in subjects undergoing maximum apnea.
Time frame: Every minute under apnea (from 0 up to 9 minutes and rest) depending on personal best with a mean of 5 measurements
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