What are the changes of sinus tachycardia and T wave in ECG examination?

Answers to frequently asked questions in clinical auxiliary examination-propranolol test 1. Question 1: A 24-year-old female, the medical report said that it is recommended to do propranolol test. I don't know what the problem is. I hope to get a detailed answer. In addition, the report also said that there was a change in sinus rhythm T wave. What's wrong with this? Is propranolol related to the change of sinus rhythm T wave? Simply put, the change of T wave may be a heart disease, or it may be a problem of adolescence and menopause. After oral administration, the normal T wave is not a heart disease. Tong Runguo of Langfang Central Brain Electrical Department is as follows: Propranolol test is often used to help distinguish whether nonspecific ST-T changes are caused by myocardial organic lesions, sympathetic nerve hyperactivity or high sensitivity of β receptors. Oral propranolol for ECG contrast test has been widely used in clinic. ST-T changes in ECG are the manifestations of abnormal cardiac repolarization, which is of great significance for the diagnosis of coronary heart disease and myocardial lesions. Many reasons may affect the process of myocardial repolarization and lead to ST-T changes, which are not only related to electrolyte disorder, but also may be caused by cardiac neurosis. Propranolol test is helpful for diagnosis. Propranolol can restore the balance of autonomic nervous system through β receptor, thus correcting the ST-T changes caused by sympathetic hyperactivity. Propranolol test is a differential diagnostic method to distinguish whether ST-T changes in ECG are functional or organic. Some patients with autonomic nervous dysfunction have sinus tachycardia, ST segment depression or T wave inversion in leads II, III and aVF. After oral administration of β -blockers such as propranolol, ST-T changes can be eliminated, indicating that such changes are caused by functional rather than qualitative diseases. Bronchial asthma and cardiac insufficiency are prohibited. The criterion is that those whose ST-T changes return to normal are positive, that is, they belong to functional changes. With reference to other clinical indicators, viral myocarditis can be ruled out. The change of ST-T is negative if it fails to return to normal, which mostly belongs to organic myocardial injury, so the diagnosis of viral myocarditis can be considered. The test method is to take propranolol 20-40mg, and then record 12 lead ECG at the 30th, 60th, 90th and 20th minutes respectively. If ST-T has returned to normal, it is positive and the test can be ended at any time. If the ventricular rate has been significantly reduced and ST-T has not recovered, it is negative, and only partial recovery is suspected to be positive. If the heart rate has not obviously decreased and ST-T has not recovered, the observation time can be prolonged or the β -receptor hyperthyroidism and cardiac neurosis can be distinguished by taking propranolol for three days. View >>