“…Stroke is accompanied by changed platelet function, such as enhancement of platelet aggregation and activity (Grau et al, 1998; Tohgi, Suzuki, Tamura, & Kimura, 1991). As a marker of platelet function, Mean platelet volume (MPV) involves in platelet reactivity, including aggregation and release of platelet factor 4, thromboxane A2, as well as β‐thromboglobulin (Sharp et al, 1995).…”