Abstract 25 Table 2

Odds ratios of heart rate <47 bpm and high grade AV block on presenting ECG predicting

Parameter	OR (95% CI)	Interpretation

First rate^†	43.8 (15.7, 121.7)	Low vs. high values
High Grade AVB first	13.5 (5.6, 32.3)	‘Yes’ vs. ‘No’

↵† Optimal threshold from ROC analysis was 47 bpm.