2. Early and late systolic murmurs also occur and should be distinguished from ejection murmurs. ���������ڻ�����Ҳ�����������Ӧ��������������
3. Conclusion: NIPPV can increase cardiac ejection, improve heart function and raise heart survival rate to patient in heart failure. ���ۣ���������ѹͨ��������������Ѫ�������Ĺ��ܡ������˥���������ʡ�
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n.
1. the act of expelling or projecting or ejecting
2. the act of forcing out someone or something