The FAAs 50% (200ms to 300ms) increase in PR interval is recorded here:
https://www.faa.gov/sites/faa.gov/files/Archives_1.pdf (search PR Interval)
The PR interval and its indication of heart health can be evidenced here:
https://heart.bmj.com/content/102/9/672.short
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The FAAs 50% (200ms to 300ms) increase in PR interval is recorded here:
https://www.faa.gov/sites/faa.gov/files/Archives_1.pdf (search PR Interval)
The PR interval and its indication of heart health can be evidenced here:
https://heart.bmj.com/content/102/9/672.short