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To study the correlation between sleep disordered breathing (SDB) and coronary slow flow phenomenon (CSFP). Holter ECG is, to some extent, valuable for screening SDB in CSFP.
Select patients who undergwent coronary angiography for being suspected of coronary heart disease during the period from January 2015 to April 2016, divide them into CSFP Group and Control Group according to the coronary angiography results. Holter ECG inspection was conducted on both groups of patients to initially select SDB patients.
The coronary angiography results indicated 29 confirmed CSFP cases and 36 normal cases. According to the Holter heart rate variability (HRV) analysis, sleep apnea risk score higher than 4 would be regarded as the positive diagnostic criteria. SDB incidence rate in the CSFP group (41.2%) was higher than that in the control group (11.9%), and the difference was of statistic value (p < 0.05). Body mass index (BMI), smoking, diabetes, history of snoring, the athletic flat test positive rate and sleep apnea risk score were all higher in the CSFP group than those in the control group (P < 0.05). After adjusting with other variables by logistic regression test, it was found that BMI and sleep apnea risk indexes were the risk factors of CSFP, with OR value of 1.142(1.002～1.433), 3.39 (1.078～10.291) respectively (both P<0.05).
SDB, an independent factor resulting in CSFP and impairing coronary flow, is thus associated with CSFP. Holter is a simple and quick non-invasive means of assessing and filtrating SDB. Correcting SDB boasts a guiding significance on the recovery of CSFP.