BACKGROUND: We investigated the platelet function in stroke patients treated with aspirin [acetylsalicylic acid (ASA)] for secondary stroke prevention during a follow-up period of 1 year. METHODS: In this prospective study 291 patients with first initiated aspirin therapy (300 mg/day) for secondary stroke prevention were included. Platelet aggregation measurements were performed 24 h, 3, 6, and 12 months after starting medication. RESULTS: Twenty-one of 291 patients (7.2%) were identified as primary ASA-non-responders (initial insufficient platelet inhibition) and 4.1% as secondary ASA-non-responders (insufficient platelet inhibition during follow-up). There were no significant differences between ASA-responders and ASA-non-responders concerning age, gender, risk factors, and stroke characteristics. CONCLUSION: Aspirin resistance in stroke patients is not uncommon. The clinical usefulness of routine platelet function tests needs to be proved by further trials.
BACKGROUND: We investigated the platelet function in strokepatients treated with aspirin [acetylsalicylic acid (ASA)] for secondary stroke prevention during a follow-up period of 1 year. METHODS: In this prospective study 291 patients with first initiated aspirin therapy (300 mg/day) for secondary stroke prevention were included. Platelet aggregation measurements were performed 24 h, 3, 6, and 12 months after starting medication. RESULTS: Twenty-one of 291 patients (7.2%) were identified as primary ASA-non-responders (initial insufficient platelet inhibition) and 4.1% as secondary ASA-non-responders (insufficient platelet inhibition during follow-up). There were no significant differences between ASA-responders and ASA-non-responders concerning age, gender, risk factors, and stroke characteristics. CONCLUSION:Aspirin resistance in strokepatients is not uncommon. The clinical usefulness of routine platelet function tests needs to be proved by further trials.
Authors: Alejandro Roman-Gonzalez; Carlos Andrés Naranjo; Walter D Cardona-Maya; Dionis Vallejo; Francisco Garcia; Cesar Franco; Leonor Alvarez; Luis Ignacio Tobón; Marta Ibeth López; Carolina Rua; Gabriel Bedoya; Ángela Cadavid; José Domingo Torres Journal: Stroke Res Treat Date: 2021-05-21