Yes, global afib prevalence is about 1-2%, so return false would be 98-99% accurate, which is why accuracy is not a metric used to assess medical diagnostics.

Yes, global afib prevalence is about 1-2%, so return false would be 98-99% accurate, which is why accuracy is not a metric used to assess medical diagnostics. However, the sensitivity of return false is 0%, which renders it useless (and why sensitivity and specificity are used in this context).