1074 patients with valvular heart diseases (VHD), non-valvular atrial fibrillation (NVAF) and acute myocardial infarction (AMI) in the last ten years were surveyed. 12.1% of patients (130/1074) were associated with stroke. The incidence in VHD was 27.2% (73/268), in NVAF 19.1% (42/220) and in AMI 2.3% (13/569), the former two are significantly higher than the last one (P less than 0.005).