找一篇关于麻醉剂的英文讲演稿

麻醉剂的英文讲演稿,可以参考内容：）~~
Ideally, the anesthetist should take a full history and examine each patient, but for the reasons already identified this is seldom possible. This section concentrates on features of particular relevance to the anesthetist.

Patients with a proven history of myocardial infarction are at a greater risk of perioperative reinfarction, the incidence of which is related to the time interval between infarct and surgery. Elective surgery should be postponed until at least 6 months after the event. Untreated or poorly controlled hypertension (diastolic consistently >110 mmHg ) may lead to exaggerated cardiovascular responses during anesthesia. Both hypertension and hypotension can be precipitated which increase the risk of myocardial ischaemia. Heart failure will be worsened by the depressant effects of anesthetic drugs on the heart, thereby impairing the perfusion valves may be on anticoagulants. These may need to be stopped or changed prior to surge