Table 4.

Univariate analysis of overall tachyarrhythmia incidence.

Variable	No (n=457)	Yes (n=267)	OR (95%CI)	P
Age (months)	5.9(0.0–275)	4.6(0–276)	1.0 (0.99–1.001)	0.33
Age less than 1 month	89 (19%)	86 (32%)	2.0 (1.4–2.8)	<0.001
Weight (kg)	6.3 (0.7–108)	5.4(1.6–97)	1.0 (0.98–1.006)	0.52
Male	236 (52%)	161 (60%)	1.4 (1.1–1.9)	0.03
History of preoperative arrhythmia	166 (36%)	102 (38%)	1.1 (0.8–1.5)	0.61
Use of cardiopulmonary bypass	359 (79%)	259 (97%)	10.0 (4.8–20.8)	<0.001
Cardiopulmonary bypass time (min)	88(0–499)	130(0–731)	1.011(1.008–1.013)	<0.001
RACHS-1 classification over 3	35 (8%)	44 (17%)	2.5 (1.5–3.9)	<0.001
On cardiac intensive care unit admission
Initial pH	7.35±0.1	7.34±0.1	0.27 (0.05–1.4)	0.13
Initial lactate (mmol/L)	2.6±2.5	4.1±3.0	1.2 (1.1–1.3)	<0.001
Dopamine	122 (27%)	99 (37%)	1.6 (1.2–2.2)	0.006
Epinephrine	36 (8%)	55 (21%)	3.0 (1.9–4.7)	<0.001
Milrinone	280 (62%)	235 (88%)	4.5 (3.0–6.9)	<0.001