Single-Center, Multisurgeon Experience with a Sutureless Rapid Deployment Aortic Valve Prosthesis: A Clinical Analysis in the United States

Table 2

Intraoperative characteristics of IPW-weighted populations in patients undergoing SLV vs. SAVR.

	SAVR	SLV	SMD
	Weighted % or mean (SE)
Operative characteristics
Aortic valve size
Mean (SE)	23.8 (0.14)	25.3 (0.12)	0.65
19–21 mm, small	25.2	3.9	0.65
22–23 mm, medium	29.1	21.8	0.17
24–25 mm, large	22.6	31.7	0.20
26–27 mm, extralarge	18.0	42.6	0.56
>27 mm	5.1	0.0	0.31
Operative approach
Full sternotomy	91.7	75.6	0.45
Minimally invasive approaches	8.4	24.3	0.45
Cardioplegia use
None	0.0	0.0	0.05
Blood	24.4	21.4	0.07
Crystalloid	0.3	1.2	0.12
Both	75.2	77.4	0.05
Cardioplegia delivery method
None	0.2	0.0	0.05
Antegrade	18.3	28.9	0.25
Retrograde	3.4	1.8	0.10
Both	78.1	69.4	0.20
Mean cross-clamp time (minutes)	90.8 (2.14)	71.6 (2.64)	0.49
Mean pump time (minutes)	125.6 (2.9)	98.9 (3.3)	0.43
Mean OR time (hours)	5.1 (0.08)	4.4 (0.15)	0.21
Intraoperative blood transfusion	21.8	21.0	0.01

SAVR: surgical aortic valve replacement; SD: standard deviation; SMD: standardized mean difference of the mean; CABG: coronary artery bypass graft surgery. ^aMinimally invasive approaches include partial sternotomy, right or left parasternal incision, right thoracotomy, limited (mini) thoracotomy, and other thoracotomy procedures. values for dichotomous and categorical variables are corrected, weighted, Pearson chi-squared statistics that account for weighted data (design-based F statistic). values for continuous variables obtained from adjusted Wald tests.