MERCURY PROJECT SUMMARY (NASA SP-45)

graph of respiration, ECG (chest) and blood pressure

Figure 18-5. MA-19. 16:11:30. Sample of biosensor record at a range station illustrating one of the frequent occurrences of sinus arrhythmia with wandering of the cardiac pacemaker. In this sample, the negative P wave suggests inverse depolarization from the atrioventricular node. Similar changes were observed before flight. (Recorder speed 25mm/sec.).

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