多普勒超声评价胎儿房性心律失常常压氧治疗的疗效

目的 应用多普勒超声评价常压氧疗法对胎儿房性心律失常的疗效。方法 对多普勒超声确诊193例未合并先天性心脏病的房性心律失常胎儿[其中各类型房性早搏(PAC)165例、室上性心动过速(SVT)28例]行常压氧治疗；对照组63例为单纯房性早搏未行常压氧治疗者。结果 (1)PAC常压氧疗法治疗第二疗程平均转归率97．8％，SVT为85．7%；经治疗后辨膜返流减轻或消失、心包积液减轻或吸收及外周血流频谱明显改善(P＜0．05)；(2)对照组PAC63例中12例停止饮用兴奋性饮品早搏消失，11例随孕周发展加重，1例发生短阵房性心动过速。结论 常压氧疗法可明显提高胎儿血氧分压，增加胎儿氧的供应和利用，有效治疗胎儿房性心律失常。

Doppler Ultrasound in Evaluating the Effect of Normobaric Oxygen Therapy on Fetal Atrial Arrhythmia

Objective To evaluate the effect of normobaric oxygen therapy on fetal atrial arrhythmia detected by Doppler ultrasound. Methods Maternal normobaric oxygen therapy was performed in 193 fetuses with atrial arrhythmia but without congenital heart disease diagnosed by Doppler echocardiography. Another 63 cases with atrial premature contractions receiving no therapy served as controls. Results (1)The average ratio of full recover in the second course of treatment was 97 8% in 165 fetuses with atrial premature contractions,and 85 7% in 28 with supraventricular tachycardia(SVT). (2)After therapy the valvular regurgitation reduced or disappeared, the pericardial effusion reduced or absorbed and the peripheral blood flow improved obviously(P<0 05). Conclusion The normobaric oxygen therapy enhanced the oxygen pressure in fetal blood, increases the supply and utilization of oxygen, and reduces the atrial premature contractions effectively and safely.