A total of 210 coronary atherosclerosis patients without indications for stent implantation are included. The baseline values of platelet aggregation rate, plasmaThromboxaneB2 and urinary 11-dh ThromboxaneB2 are measured by Light Transmittance Aggregometry method and ELISA after aspirin 100 mg /d ≥5d. Then the patients are randomly divided into 7 groups: Group1: aspirin 100 mg/d; Group2: aspirin 100 mg /2d; Groups3: aspirin 100 mg / 3d; Groups4: morning 50mg evening 50mg; Group5: aspirin 75mg / d; Group6: aspirin 50mg / d; Group7: indobufen100mg bid. One month later,arachidonic acid-induced platelet aggregation rate , plasma TXB2 and urine 11-dh TXB2 are analyzed again. All patients are followed-up for 1 year. The stomach Intestinal reactions, small bleeding events are recorded.
A total of 210 coronary atherosclerosis patients without indications for stent implantation are included. Exclusion criteria：Aspirin resistance, uncontrolled hypertension (\> 160 / 100mmHg),hemoglobin concentration \<100g /L, hemorrhagic disease or a history of bleeding tendency, taking other nonsteroidal drugs, severe liver disease history, malignant tumor, active gastric mucosa bleeding, percutaneous coronary intervention history, coronary artery bypass surgery, cardiac function grade Ⅳ.The baseline values of platelet aggregation rate, plasma TXB2 and urinary 11-dh TXB2 are measured by LTA method and ELISA after aspirin 100 mg /d ≥5d. Then the patients are randomly divided into 7 groups: Group1: aspirin 100 mg/d; Group2: aspirin 100 mg /2d; Groups3: aspirin 100 mg / 3d; Groups4: morning 50mg evening 50mg; Group5: aspirin 75mg / d; Group6: aspirin 50mg / d; Group7: indobufen100mg bid. One month later,arachidonic acid-induced platelet aggregation rate , plasma TXB2 and urine 11-dh TXB2 are analyzed again. All patients are followed-up for 1month,6months and1 year. The stomach Intestinal reactions, small bleeding events ,whether to take proton pump inhibitors are recorded.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
210
100mg aspirin for at least 5 days followed by aspirin 100mg/d
100mg aspirin for at least 5 days followed by aspirin 100mg/2d
100mg aspirin for at least 5 days followed by aspirin 100mg/3d
100mg aspirin for at least 5 days followed by aspirin 50mg bid
100mg aspirin for at least 5 days followed by aspirin 75mg/d
100mg aspirin for at least 5 days followed by aspirin 50mg/d
100mg aspirin for at least 5 days followed by indobufen 100mg bid
First Affiliated Hospital of Nanjing Medical University
Nanjing, Jiangsu, China
platelet aggregation
Regional differences between blood samples from each subjects of different groups by LTA.The results of LTA are reported in platelet aggregation rate(%).Platelet aggregation was induced by0.5mg/ml arachidonic acid (AA).
Time frame: 2 hours
plasma thromboxaneB2
The plasma thromboxane B2 concentration of each subjects are measured by enzyme-linked immunosorbent assay .(cayman chemical, thromboxaneB2 express EIA kit-Monoclonal)
Time frame: 3montshs
urine 11-dehydro thromboxaneB2
The urine 11-dehydro thromboxane B2 concentration of each subjects are measured by ELISA.(cayman chemical,11-dehydro thromboxaneB2 ELISA kit-Monoclonal)
Time frame: 3 months
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