急性左心衰是临床常见急症之一,特别是发展到肺水肿阶段以后,呼吸道和肺泡的大量分泌物及肺泡萎陷,可造成低氧血症,加重心肌缺氧,并使心功能迅速恶化并形成恶性循环,因此纠正低氧血症,阻断恶性循环是治疗的关键。我们对经常规药物治疗无效的急性左心衰患者进行分组观察治疗以观 Acute left heart failure is one of the common clinical emergency, especially after the development of pulmonary edema stage, a large number of respiratory and alveolar secretions and alveolar collapse, can cause hypoxemia, aggravate myocardial hypoxia, and rapid deterioration of cardiac function And form a vicious circle, so to correct hypoxemia, blocking the vicious cycle is the key to treatment. We are not routine conventional drug treatment of acute left heart failure patients were treated by observation group