(1) emergency. ① Patients suspected of acute myocardial infarction should lie on their back immediately and be given 2 ~ 5 liters/minute oxygen through nasal catheter or mask. ② Sedate and relieve pain. ③ Nitroglycerin 0.5mg can be used repeatedly. ④ Lidocaine 500mg was added into the liquid and injected intravenously 1 ~ 4 mg/min to prevent and eliminate arrhythmia. ⑤ ECG monitoring, pay attention to the occurrence of arrhythmia and deal with it in time. ⑥ Intravenous thrombolysis should be carried out immediately if conditions permit.

(2) closely observe the condition. ① Observation of complications: Monitoring of vital signs is very important. Lower blood pressure and faster pulse suggest that shock may occur; Pulse rhythm changes, and arrhythmia may occur; Breathing frequency is too slow, which may be morphine poisoning. ② Prognostic evaluation. ③ Monitoring of thrombolytic therapy: blood pressure, electrocardiogram, bleeding complications and nervous system signs, serum CK and isoenzymes, adverse drug reactions.

(3) Relieve pain: use painkillers in time according to the doctor's advice. Oxygen inhalation can increase the oxygen partial pressure, make it easier for oxygen partial pressure to spread to ischemic myocardium, and help relieve pain.

(4) Rest and activities: Patients in acute phase should stay in bed absolutely within 12 hours. If there are no complications, patients can be encouraged to stay in bed for physical activities within 24 hours; If there is no hypotension, you can walk around the ward on the third day; On the 4th to 5th day, gradually increase the activity until walking 100 ~ 150m every day.

(5) Psychological support: explain the patient's condition and treatment progress, establish a good nurse-patient relationship with the patient and give psychological support.

(6) Dietary care: liquid diet was given on the first day of onset, and then changed to semi-liquid diet. Food should be light and easy to digest, and eating less and more meals can reduce the oxygen demand of the heart.

(7) Defecation nursing: Because of bed rest and eating liquid diet, patients often have constipation, and patients are often not used to using bedpans in bed, so it is necessary to help patients defecate safely every day.

(8) Nursing after 8)PTCA: Stay in bed for 6 hours, keep the puncture leg straight, and press the puncture site with sandbags; Four hours after operation, 1 vital signs were observed every 30 minutes, and then measured four times a day; Record ECG every day; Blood was drawn immediately after operation to check the concentration of CPK in blood, and then 1 time, * * * twice every 8 hours.

(9) Do a good job in health education.