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妊娠造成血容量和心输出量增加,而且这些改变要持续到生产。心输出量由于心率和每搏输出量的增加而增加(Lees,1979)。正常的心血管系统能够容易地承受这种额外负担,但也可能误认为心脏病的表现。这些症状和体征必须识别,是为了与那些由于心脏病所产生的鉴别开。劳力性呼吸困难与双踝部水肿是正常妊娠时常有的症状。除有合理解释和再肯定外不需处理。检查中,常有体积增大甚至压迫脉搏;静脉压可能升高。高动力循环也可反应在听诊上可能有喷射性收缩期杂音。在小孩,这种杂音在胸骨左沿最清楚,可能是杂音起源于听诊器
Pregnancy causes increased blood volume and cardiac output, and these changes continue until production. Cardiac output increases due to increased heart rate and stroke volume (Lees, 1979). The normal cardiovascular system can easily afford this additional burden, but may also mistakenly acknowledge the manifestation of heart disease. These signs and symptoms must be identified in order to identify those with heart disease. Labor-induced dyspnea and double-ankle edema are common symptoms of normal pregnancy. Except with reasonable explanation and affirmation, there is no need to deal with it. Check, often the volume increases or even pressure pulse; venous pressure may increase. High power cycles may also respond to possible auscultative systolic murmur during auscultation. In children, this murmur is most clearly located on the left side of the sternum and may have originated in the stethoscope