RESUMO
Objective To compare plasma levels of ANP in experimental and control groups and continuously explore the value of ANP in diagnosis and treatment of acute PTE. Methods Thirty guinea pigs were randomized to PTE group(n = 15) and control( n = 15) group. The plasma level of ANP was examined by radioimmunoassay.Moreover, pulmonary embolism(PE) was explored at dissection and on microscopic examination after PTE. Results (1)The plasma levels of ANP in the early phase of PTE group were significantly higher than those in control group(P＜0.05). (2)The plasma levels of ANP after PTE were significantly higher than those before PTE( P＜0.05). (3)In the late phase of PTE, the plasma levels of ANP in PTE group declined to normal levels, compared with control group, and there was no significant difference( P＞0.05). Conclusion (1) ANP, as a vasodilatory factor,was involved in mechanism of PTE,especially in the early phase of acute PTE. (2)The levels of ANP in plasma played as a sensitive marker used to observe conditions and seriousness of PTE.