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 ...
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...
T wave amplitudeventricular action potentialThe T wave seen on the surface ECG represents the repolarization of the ventricular action potential. The amplitude of the T wave is usually most positive in the anterior leads, specifically V2 or V3. The upper limits of normal for positive T wave ...
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 ...
decreased arterial oxygen supply ➡️ ATP depletion & decreased Na/K ATPase activity ➡️ partial depolarization ➡️ increased excitability & reentry (adjacent normal cardiomyocyte has positive charge) ➡️ ventricular tachycardia
非Q波性心梗 non-Q wave MI 非持续性室速 nonsustained ventricular tachycardia 非透壁性心梗 nontransmural MI 正常窦性心律 normal sinus rhythm 二尖瓣型P波 P mitrale 肺型P波 P pulmonale 房性早搏 PAC / Premature atrial contractions 起搏心律 pacemak...
1.Sinus Tachycardia是一种心率超过100bpm 的,同时保持"窦性心律"sinus rhythm(在第二期中提及过)的"心动过速"。 除了heart rate >100bpm以外, ECG上的其他特征应属正常,包括:regular rhythm, normal P wave, narrow("窄",为正常)QRS complex, normal T wave ...
MeanQRSaxisMeanQRSaxis26CardiacRotationCardiacRotation27.Ⅲ.NORMALECG⒈PWave⒉P-RInterval⒊QRScomplex⒋Jpoint⒌STSegment⒍TWave⒎Q-TInterval⒏UWave.Ⅲ.NORMALECG⒈PWave28.Ⅲ.NOMALECG ——PWave⑴form:I、II、avF、V4-6 ⑵duration:<0.12s⑶amplitude:Limbleads <0.25mV,Chestleads<0.20mV..Ⅲ.NOMALECG...
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...