When doctors
carried out an electroencephalography (EEG), they had discovered the patient
had developed epilepsy. However, during the EEG recordings he had experienced a
heart attack and died.
这个句子按照逻辑，应该是医生执行了EEG后，才发现病人的问题，但为什么这里主句反而用过去完成时，这个时间顺序是不是搞混了？还有第二个句子 experience只用过去式，是否也能从逻辑上判断出两个动作的时间顺序？
