Abstract
This study aimed to clarify whether smoking had any influence on platelet aggregability in coronary patients with different lipoprotein abnormalities. We studied 297 non-diabetic patients with coronary heart disease, 40 to 85 years of age, 223 (75%) male, 167 smokers and 130 never smokers. After 3 months on Step-One diet, without any regular medication, patients had fasting plasma total cholesterol levels > or = 6.2 mmol/L; low-density lipoprotein > or = 4.14 mmol/L; and different levels of high-density lipoprotein and triglycerides. Platelet aggregation was analyzed by turbidometric method of Born. Patients were classified in groups of smokers and non-smokers. Results showed that platelet hyperaggregability was more prevalent in smokers with lower levels of high-density lipoprotein (47% vs. 20%; P=0.004 for spontaneous platelet aggregation, 56% vs. 33%; P=0.02 for adenosine diphosphate induced platelet aggregation), and in smokers with hypertrygliceridemia (64% vs. 29%; P=0.004 for spontaneous, 81% vs. 43%; P<0.0001 for adenosine diphosphate induced, and 87% vs. 46%; P<0.0001 for adrenaline induced platelet aggregation). Platelet hypoaggregability was greater in non-smokers with normal high-density lipoprotein and triglyceride...Continue Reading
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