Myocardial infarction is caused by an abrupt occlusion of coronary artery that shuts down the blood supply to the heart. decreased arterial oxygen supply ➡️ ATP depletion & decreased Na/K ATPase activity ➡️ partial depolarization ➡️ increased excitability & reentry (adjacent normal ca...
Loss of precordial T-wave balance occurs when the upright T wave is larger than that in V6. This is a type ofhyperacute T wave. The normal T wave in V1 is inverted. An upright T wave in V1 is considered abnormal — especially if it is tall (TTV1), and especially if it is n...
Cellular basis for the normal T wave and the ECG manifestations of the long QT syndromedoi:10.1016/S0022-0736(98)80063-0Gan-XinYanandCharlesAntzelevitchSDOSJournal of ElectrocardiologyG. Yan and C. Antzelevitch, "Cellular basis for the normal T wave and the ECG manifestations of the Long-...
Atrial escape beat 35 35 n Supraventricular escape beat 36 36 @ Link to external data (aux_note contains URL) 37 37 x Non-conducted P-wave (blocked APB) 38 38 f Fusion of paced and normal beat 39 39 ( Waveform onset 40 40 ) Waveform end 41 41 r R-on-T premature ventricular ...
Figure 38. The electrical axis of the heart (heart axis). As evident from the figure, the normal heart axis is between –30° and 90°. If the axis is more positive than 90° it is referred to as right axis deviation. If the axis is more negative than –30° it is referred to ...
正常ECG(戚恒)心电图的基础知识 心电图的概念：心脏每次机械性收缩之前先产生电激动，心房和心室电激动可经人体组织传到体表，因电流的强弱与方向不断的变动，各体表的电位也不断的变动，用心电图机从体表连续记录每个心动周期所产生电位曲线叫心电图。心电图是临床诊断疾病的方法之一，是临床医师必须掌握的诊断...
Tall secondary R wave in lead V1 Wide, slurred S wave in leads I, V5, V6 Associated feature: ST segment depression and T-wave inversion in leads V1, V2, and sometimes V3 Usually a normal axis Normal variant in ∼ 5% of individuals [10] Cardiac Coronary artery disease Myocardial...
Tall secondary R wave in lead V1 Wide, slurred S wave in leads I, V5, V6 Associated feature: ST segment depression and T-wave inversion in leads V1, V2, and sometimes V3 Usually a normal axis Normal variant in ∼ 5% of individuals [10] Cardiac Coronary artery disease Myocardial...
This ECG Interpretation course will show how to identify normal versus abnormal cardiac anatomy, cardiac cycle and electrical conduction through the heart.
QT interval is usually 0.32s to 0.44s in normal heart rate. QT间期 QRS波群起点至T波终点时间,代表心室除极和复极的总共时间。其随心率变化而变化,正常心率范围内QT间期在0.32～0.44s。 U wave It is the low and flat wave at 0.02-0.04s after T wave, which direction is consistent with T wave....