Background: Aortic dissection (AD) is a relatively rare but dreadful illness, often accompanied by severe, sharp (or tearing) back pain or anterior chest pain, as well as acute hemodynamic compromise. Painless dissect...Background: Aortic dissection (AD) is a relatively rare but dreadful illness, often accompanied by severe, sharp (or tearing) back pain or anterior chest pain, as well as acute hemodynamic compromise. Painless dissection has also been reported in rare cases and might be misdiagnosed due to its atypical symptoms leading to catastrophic outcomes. Case presentation: The patient was admitted to the hospital due to right limb weakness with speech inability for more than 10 hours. In the routine cardiac ultrasound examination, the avulsion intimal echo was found in the initial segment of the descending aorta. The rupture range was about 11 mm, and the lumen was separated into real and false lumen. Further computed tomography angiography (CTA) examination confirmed the major arterial dissection (De Bakey Type I). Conclusion: We report a case of painless aortic dissection with active carotid artery thrombosis diagnosed by ultrasound and CTA, and to improve the understanding of painless aortic dissection by reviewing relevant domestic and foreign literature.展开更多
Objective： To investigate the effects of propyl gallate （PrG） on the thrombus formation time and the coagulation/fibrinolysis system in an experimental carotid artery thrombosis model in rats. Methods： Fifty SD ra...Objective： To investigate the effects of propyl gallate （PrG） on the thrombus formation time and the coagulation/fibrinolysis system in an experimental carotid artery thrombosis model in rats. Methods： Fifty SD rats were randomly divided into 5 groups （10 animals/group）： the normal group （normal saline 2 mL/kg）, the model group （normal saline, 2 mL/kg）, the heparin control group （1 250 IU/kg）, the low dose PrG group （30 mg/kg）, and the high dose PrG group （60 mg/kg）. Thirty minutes after intravenous injection of saline or the corresponding drugs, a carotid artery thrombus was induced by continuous electric stimulation in all rats except for those in the normal group. The duration from the initiation of the electric stimulation to the sudden drop in carotid temperature was recorded as the thrornbus formation time. Levels of plasma tissue-type plasminogen activator （t-PA） and plasminogen activator inhibitor-1 （PAl-1） were determined by ELISA. Results： PrG （30 and 60 mg/kg） can prolong the thrombus formation time, but the effect was obviously weaker than that of heparin （P〈0.05, P〈0.01）. Compared with the model group, PrG （30 and 60 mg/kg） elevated the plasma activity of t-PA （both P〈0.05） and showed an increasing tendency in elevating the ratio of t-PA/PAI-1 （P〉0.05）, while it had no significant effect on the level of PAI-1. Conclusion： PrG has a certain antithrombotic effect and can slightly regulate the imbalance of the t-PA/PAl-1 ratio.展开更多
文摘Background: Aortic dissection (AD) is a relatively rare but dreadful illness, often accompanied by severe, sharp (or tearing) back pain or anterior chest pain, as well as acute hemodynamic compromise. Painless dissection has also been reported in rare cases and might be misdiagnosed due to its atypical symptoms leading to catastrophic outcomes. Case presentation: The patient was admitted to the hospital due to right limb weakness with speech inability for more than 10 hours. In the routine cardiac ultrasound examination, the avulsion intimal echo was found in the initial segment of the descending aorta. The rupture range was about 11 mm, and the lumen was separated into real and false lumen. Further computed tomography angiography (CTA) examination confirmed the major arterial dissection (De Bakey Type I). Conclusion: We report a case of painless aortic dissection with active carotid artery thrombosis diagnosed by ultrasound and CTA, and to improve the understanding of painless aortic dissection by reviewing relevant domestic and foreign literature.
基金Supported by the National Natural Science Foundation of China(No.90409021)
文摘Objective： To investigate the effects of propyl gallate （PrG） on the thrombus formation time and the coagulation/fibrinolysis system in an experimental carotid artery thrombosis model in rats. Methods： Fifty SD rats were randomly divided into 5 groups （10 animals/group）： the normal group （normal saline 2 mL/kg）, the model group （normal saline, 2 mL/kg）, the heparin control group （1 250 IU/kg）, the low dose PrG group （30 mg/kg）, and the high dose PrG group （60 mg/kg）. Thirty minutes after intravenous injection of saline or the corresponding drugs, a carotid artery thrombus was induced by continuous electric stimulation in all rats except for those in the normal group. The duration from the initiation of the electric stimulation to the sudden drop in carotid temperature was recorded as the thrornbus formation time. Levels of plasma tissue-type plasminogen activator （t-PA） and plasminogen activator inhibitor-1 （PAl-1） were determined by ELISA. Results： PrG （30 and 60 mg/kg） can prolong the thrombus formation time, but the effect was obviously weaker than that of heparin （P〈0.05, P〈0.01）. Compared with the model group, PrG （30 and 60 mg/kg） elevated the plasma activity of t-PA （both P〈0.05） and showed an increasing tendency in elevating the ratio of t-PA/PAI-1 （P〉0.05）, while it had no significant effect on the level of PAI-1. Conclusion： PrG has a certain antithrombotic effect and can slightly regulate the imbalance of the t-PA/PAl-1 ratio.
