Radomír Nosáľ
Acetylsalicylic acid is economically the most advantageous drug for secondary prevention of cardiovascular diseases inspite of its often failure. This is linked to series of factors being in on reccurrent little strokes in patients taking aspirin including various predispositions, smoking, drugs interactions and aspirin resistance of its own. This phenomenon is regarded as measurable persistent blood platelet activation found in patients taking therapeutic doses of aspirin and disturbance of its pharmacologic effectiveness to the function of platelets as well as low clinical response manifested by the risk of reccurrent little strokes in treated patients. Recent studies have reported that the prevalence of aspirin resistance is higher in patients with acute coronary syndrome (40 %) than in patients with stable coronary diseases (up to 30 %).