Table 3
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ECV outcomes and estimated impact of implementing the Ottawa AF cardioversion protocol

Phase I, n (%)Phase II, n (%)P-valueUnadjusted RR (95% CI)Adjusted RR (95% CI)aP-valuea
ECV success459/500 (91.8)386/389 (99.2)<0.0011.08 (1.05–1.11)1.08 (1.05–1.11)<0.001
First shock success396/500 (79.2)344/389 (88.4)<0.0011.12 (1.05–1.18)1.09 (1.02–1.15)0.008
Sustained successb421/497 (84.7)351/383 (91.6)0.0021.08 (1.03–1.14)1.08 (1.02–1.14)0.005
Phase I, n (%)Phase II, n (%)P-valueUnadjusted RR (95% CI)Adjusted RR (95% CI)aP-valuea
ECV success459/500 (91.8)386/389 (99.2)<0.0011.08 (1.05–1.11)1.08 (1.05–1.11)<0.001
First shock success396/500 (79.2)344/389 (88.4)<0.0011.12 (1.05–1.18)1.09 (1.02–1.15)0.008
Sustained successb421/497 (84.7)351/383 (91.6)0.0021.08 (1.03–1.14)1.08 (1.02–1.14)0.005

AF, atrial fibrillation; CI, confidence interval; ECV, electrical cardioversion; RR, relative risk.

a

Adjusted for age, body mass index, amiodarone use, and first shock transthoracic impedance.

b

Based on pre-discharge electrocardiogram review.

Table 3
Open in new tab

ECV outcomes and estimated impact of implementing the Ottawa AF cardioversion protocol

Phase I, n (%)Phase II, n (%)P-valueUnadjusted RR (95% CI)Adjusted RR (95% CI)aP-valuea
ECV success459/500 (91.8)386/389 (99.2)<0.0011.08 (1.05–1.11)1.08 (1.05–1.11)<0.001
First shock success396/500 (79.2)344/389 (88.4)<0.0011.12 (1.05–1.18)1.09 (1.02–1.15)0.008
Sustained successb421/497 (84.7)351/383 (91.6)0.0021.08 (1.03–1.14)1.08 (1.02–1.14)0.005
Phase I, n (%)Phase II, n (%)P-valueUnadjusted RR (95% CI)Adjusted RR (95% CI)aP-valuea
ECV success459/500 (91.8)386/389 (99.2)<0.0011.08 (1.05–1.11)1.08 (1.05–1.11)<0.001
First shock success396/500 (79.2)344/389 (88.4)<0.0011.12 (1.05–1.18)1.09 (1.02–1.15)0.008
Sustained successb421/497 (84.7)351/383 (91.6)0.0021.08 (1.03–1.14)1.08 (1.02–1.14)0.005

AF, atrial fibrillation; CI, confidence interval; ECV, electrical cardioversion; RR, relative risk.

a

Adjusted for age, body mass index, amiodarone use, and first shock transthoracic impedance.

b

Based on pre-discharge electrocardiogram review.

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