Objective:To investigate the relationship between preoperative high-sensitivity C-reactive protein (Hs-CRP) levels and clinical outcomes of patients undergoing off-pump coronary artery bypass graft (OPCABG) surgery.Methods:We prospectively selected 123 patients who received OPCABG at Beijing Anzhen Hospital from January 2019 to October 2019, and collected relevant preoperative and postoperative data. Patients were divided into a normal Hs-CRP group(78 cases) and an elevated Hs-CRP group(45 cases)according to the cutoff value (2 mg/L) of Hs-CRP level. The data of the two groups were compared, and regression analysis was performed on the postoperative data with differences to define independent factors.Results:The leukocyte count in the Hs-CRP group was significantly higher than that in the normal Hs-CRP group[(6.5±1.6)×10 9/ml vs. (7.4±2.1) ×10 9/ml, t=-2.839, P=0.005]. In the elevated Hs-CRP group, proportion of patients with atrial post-CABG atrial fibrillation (38% vs. 19%, χ2=5.100, P=0.024), duration of hospitalization[(21.2±7.1)days vs.(16.0±4.6)days, t=-4.469, P=0.000], hospital costs[(143.1±30.7)×10 3 yuan vs. (123.7±21.8)×10 3 yuan, t=-4.090, P=0.000]were significantly higher than those in the normal Hs-CRP level group. Smoking ( OR=1.660, 95% CI: 1.186-1.993, P=0.031) and Hs-CRP ( OR=1.170, 95% CI: 1.050-1.294, P=0.007) were independent risk factors for post-CABG atrial fibrillation. Hs-CRP ( B=0.436, 95% CI: 0.197-0.675, P=0.000) and left ventricular ejection fraction (LVEF, B=-0.180, 95% CI: -0.289--0.071, P=0.001) were independent influencing factors of duration of hospitalization. Hypertension ( B=-11.256, 95% CI: -20.670--1.842, P=0.020), Hs-CRP( B=1.235, 95% CI: 0.217-2.254, P=0.018) and LVEF ( B=-1.168, 95% CI: -1.634--0.702, P=0.000) were independent influencing factors of hospital costs. Conclusion:The preoperative Hs-CRP level of OPCABG is an independent influencing factor of post-CABG atrial fibrillation, duration of hospitalization and hospital costs. This finding lays the foundation for Hs-CRP combined with other indicators to accurately predict the prognosis of OPCABG and screen high-risk patients.
Objective:To investigate the effect and mechanism of obstructive sleep apnea hypopnea syndrome(OSAHS) on nocturnal angina in patients who undergo coronary artery bypass grafting(CABG).Methods:According to the inclusion criteria and exclusion criteria, this prospective observational study included 76 patients who underwent CABG at Beijing Anzhen Hospital affiliated to Capital Medical University from January 2018 to December 2018. Patients included 60 males and 16 females, mean aged(61.4±7.3) years, BMI(25.7±2.3) kg/m 2. Portable sleep respiration monitoring and bedside ECG monitoring were performed before surgery. According to the apnea index(AHI), patients were divided into mild or no OSAHS group(AHI<15, 35 patients) and moderate to severe OSAHS group(AHI≥15, 41 patients). Baseline data, hematologic examination, degree of coronary stenosis, sleep breathing examination, night time heart rate and incidence of atrial fibrillation, and nocturnal angina were compared between the two group. Results:Combined with mild or no OSAHS group, moderate to severe OSAHS group had a significantly higher syntax-score(47.3±10.6 vs 35.1±6.8), a significantly higher proportion of coronary diffuse lesions(53.7% vs 31.4%), a significantly faster heart rate[(94.3±21.5)times/min vs(74.8±10.0) times/min], a significantly higher proportion of nocturnal angina(29.2% vs 2.9%). The differences were statistically significant( P<0.05). Binary logistic regression analysis showed that the fastest heart rate at night significantly affected the occurrence of nocturnal angina in CABG patients( OR=1.320, 95% CI: 1.084-1.607, P=0.006), the syntax-score, the fastest heart rate at night significantly affected the degree of OSAHS in CABG patients( OR=1.269, 95% CI: 1.094-1.473, P=0.002; OR=1.066, 95% CI: 1.004-1.131, P=0.036). Two linear regression showed a significant linear correlation between AHI with the fastest heart rate and syntax-score at night( R2=0.576, P<0.001; R2=0.658, P<0.001). Conclusion:OSAHS can significantly aggravate the degree of coronary artery stenosis in CABG patients, and further increase the incidence of nocturnal angina by significantly increasing nighttime heart rate.