Red cell distribution width predicts new-onset atrial fibrillation after coronary artery bypass grafting

Figures & data

Table I. Basal characteristics of patients.

	Postoperative AF (2) n = 99	Postoperative AF (+) n = 33	p
Gender (Male)	74 (74%)	25 (75%)	0.91
Age (years)	60.9 ± 10	60.2 ± 9	0.73
Diabetes Mellitus	23 (23%)	10 (30%)	0.42
Hypertension	83 (83%)	26 (78%)	0.51
Dyslipidemia	77 (77%)	23 (69%)	0.35
Smoke	88 (88%)	25 (75%)	0.06
Aspirin	97 (97%)	32 (96%)	0.74
NSAID	67 (67%)	23 (69%)	0.83
Betablocker	83 (83%)	30 (90%)	0.32
Ca Channel Blocker	15 (15%)	6 (18%)	0.68
ACE -I	8 (8%)	2 (6%)	0.74
ARB	18 (18%)	6 (18%)	0.9
Statin	52 (52%)	25 (75%)	0.02
By-pass time (min)	95.5 (73–111.75)	116 (94.25–131.75)	0.02
Cross-clamp time (min)	50.5 (36–65)	65 (41.5–83.75)	0.05

AF, Atrial fibrillation; ACE-I, Angiotensin converting enzyme inhibitors; ARB, Angiotensin receptor blockers; NSAID, Nonsteroidal anti-inflammatory drug.

Data are presented as numbers (%) or median (interquartile range).

Table II. Comparison of the preoperative echocardiografic and laboratory parameters among patients with or without postoperative AF.

	Postoperative AF (2) n = 99	Postoperative AF (+) n = 33	p
HDL (mg/dl)	57.3 ± 11.5	59.9 ± 12.1	0.26
LDL (mg/dl)	97.6 ± 36.8	102.4 ± 39.8	0.53
Trygliceride (mg/dl)	131.9 ± 32.8	125.5 ± 14.8	0.28
MPV (fl)	9.5 ± 1.9	9.2 ± 1.4	0.39
White cell count (× 10^9 / L)	8.5 ± 2.5	8.9 ± 4.6	0.57
Lymphocyte (× 10^9 / L)	2.3 ± 1.4	3.2 ± 2.8	0.17
Neutrophyle (× 10^9 / L)	5.8 ± 3.1	7.1 ± 6.1	0.18
RDW	13.3 ± 1.2	13.9 ± 1.4	0.03
Hg (gr/dL)	14.1 ± 6.6	15.4 ± 8.1	0.4
Creatinine (mg/dl)	0.91 ± 0.3	0.92 ± 0.26	0.91
LVEF (%)	48.1 ± 8.8	47.5 ± 9	0.78
Left atrium dimension (mm)	38.9 ± 6.4	38.9 ± 7.8	0.99

AF, Atrial fibrillation; HDL, High-density lipoprotein; Hg, Hemoglobin; LDL, Low-density lipoprotein; LVEF, Left ventricular ejection fraction; MPV, Mean platelet volume; RDW, Red blood cell distribution width.

Figure 1. Receiver-operating characteristic (ROC) curve analysis for prediction of postoperative atrial fibrillation (AF) by RDW (red blood cell distribution width).

Kaw R, Hernandez AV, Masood I, Gillinov AM, Saliba W, Blackstone EH. Short and long-term mortality associated with new-onset atrial fibrillation after coronary artery bypass grafting: a systematic review and meta-analysis. J Thorac Cardiovasc Surg. 2011;141:1305–12.

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