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- W2380607121 abstract "Objective To investigate the maternal hemodynamic changes during the second and third trimester of normal pregnancy as well as during labor and delivery. Methods Series of hemodynamic changes were detected during the second and third trimester of normal pregnancy together with labor and delivery by thoracic electrical bioimpedance monitoring in 30 healthy pregnant women. Results ①Compared to those of 24-28 week gestations,the heart rate and cardiac output increased 13.0% and 11.0% respectively,the mean arterial pressure and systemic vascular resistance decreased 8.6% and 14.8% respectively at 28-32 week gestations(P0.05).②Compared to those of third trimester of normal pregnancy,the cardiac output increased 9.2%(P0.05),mean arterial pressure increased 5.4%,systolic time ratio decreased 21.0%(P0.05),left ventricular work was significantly increased 16.4%(P0.05)during the first stage of labor.The mean heart rate,mean arterial pressure and systemic vascular resistance reached maximum during the second stage of labor.Mean arterial pressure and systemic vascular resistance increased 11.5% and 23.0%(P0.05) respectively,cardiac output decreased 6.5% while left ventricular work increased 11.3% as compared to those the first and second stage of labor.(Conclusions) Cardiac output increase obviously at 28-32 week gestations and are kept at higher level by increase of heart rate,cardiac contraction and reduction of afterload.During the first and second stages of labor,the maternal hemodynamic changes being more significant,the cardiac load reaches maximum at the second stages of labor." @default.
- W2380607121 created "2016-06-24" @default.
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- W2380607121 date "2005-01-01" @default.
- W2380607121 modified "2023-09-24" @default.
- W2380607121 title "Study of maternal hemodynamics during the second and third trimester of normal pregnancy as well as during labor and delivery" @default.
- W2380607121 hasPublicationYear "2005" @default.
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