不稳定型心绞痛一般认为即反复发作的休息时疼痛,其时间、性质及频繁程度较一般心绞痛更严重,心电图可出现ST T改变。不稳定型心绞痛也可以由以前可预测的劳累性心绞痛型心绞痛转变为休息时心绞痛。大部分急性心肌梗死(AMI)都有不适的前驱症状,但另一方面不稳定型心绞痛的死亡 Unstable angina pectoris is generally considered to be repeated episodes of rest pain, its time, nature and frequency more severe than the average angina, STT ECG changes can occur. Unstable angina pectoris can also be converted from resting predictable angina pectoris to resting angina. Most acute myocardial infarctions (AMIs) have unpleasant prodromal symptoms, but on the other hand the death of unstable angina