Natural history and evaluation of Q waves during acute myocardial infarction.
نویسندگان
چکیده
Serial 72 point praecordial electrocardiographic maps were recorded in 45 patients with uncomplicated acute anterior myocardial infarction. These were analysed and the serial changes in Q waves and ST segments were recorded. Cardiospecific enzyme release curves were constructed from repeated measurements of the plasma activity of the myocardial isoenzyme of creatine kinase (MB CK) during 4 days after the onset of chest pain. The praecordial maps showed that Q waves appeared in the second hour after the onset of chest pain and the development of this electrocardiographic sign was completed within 12 hours. There were complex relations between the development of Q waves, the natural history of ST segment elevation, and the release of MB CK activity. The praecordial area of ST segment elevation at 2 hours was directly related to the fully developed Q wave area at 24 hours after the onset of chest pain. The electrical activity of affected myocardium was lost before peak plasma MB CK activity.
منابع مشابه
Evaluation of the role of opium addiction in acute myocardial infarction as a risk factor
Background: More than half of myocardial infracted (MI) patients have no conventional risk factors. Regarding the belief that opium addiction has a protective effect on heart diseases, addiction prevalence has unfortunately increased in recent years. This study was conducted to investigate the effect of opium addiction on patients with acute myocardial infarction. Methods: This case-control stu...
متن کاملاثر ترکیبی آنتی اکسیدانت ها بر اندازه انفارکتوس حاد میوکارد
Background and purpose : The role of oxygen-derived free radicals in destruction of myocardial cells during acute ischemia or reperfusion has been proved. This phenomenon made the workers to study and find the inhibitory therapeutic methods in order to reduce the myocardial cell destruction during acute myocardial infarction. This study evaluates the role of combined antioxidants on acute myo...
متن کاملEffet of low-dose Aspirin on mortality of Acute myocardial Infarction
SUMMARY Between Aug. 1982 and March 1984, In a prospective, randomized trial approximately 24 hours after the onset of acute myocardial, infarction (MI), the influence of Low dose aspirin (120-150 mg/day, just during inhospital phase), on inhospital and post- hospital mortality rate was studied in 62 patients, and compared with control group. The two groups were comparable with regard to age,...
متن کاملElectrocardiographic Precordial Mapping in Anterior Myocardial Infarction
Serial 72-point precordial mapping of the ECG has been recorded to describe the natural history of changes in the precordial areas of ST segment elevation and the development of Q waves in 51 patients with acute uncomplicated anterior myocardial infarction. Eight patients have been studied in the same way but received 25 mg/kg of methylprednisolone sodium succinate as a single intravenous injec...
متن کاملFactors associated with prehospital delay in patients with acute myocardial infarction
Introduction: Treatment of patients with acute myocardial infarction (AMI) is time related, so delay in treatment could affect prognosis. Recognizing pre-hospital or in-hospital delays in initiating treatment and reducing these factors is very efficacious in treatment of these patients. Methods: A cross sectional study was carried out on 227 patients with acute myocardial infarction. Demographi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- British heart journal
دوره 40 4 شماره
صفحات -
تاریخ انتشار 1978