[单项选择]Man: By the way, Jane, did you talk to the consultant about our health program Woman: I contacted his office, but his secretary said he would be out for lunch until two. Question: What does the woman mean
第28题: [单项选择]持续性心房颤动用洋地黄治疗的主要目的是 A. 减慢心房率 B. 加强心肌收缩力 C. 恢复窦性心律 D. 减慢心室率 E. 抑制迷走神经 参考答案:D 答案解析:[解题思路] 持续性心房颤动自发转复为窦性心律可能性小,它常发生于原有心血管疾病者如风心病、心肌病、高血压心脏病等,其临床症状的轻重受心室率快慢的影响,心室率快时可影响心功能,使心排血量减少25%以上