In a “normal” electrocardiogram (ECG), the transition of the QRS axis in the precordial leads occurs between leads V 3 and V 4 (i.e., there is a dominant S in V 3 and a dominant R in V 4 ...

2019年1月9日 · The average rate is 54 beats/min. All of the QRS complexes are identical, and they have a normal duration (0.08 sec) and normal axis between 0° and +90° (positive QRS …

2024年7月22日 · There is a regular rhythm at a rate of 110 beats/min. P waves occur before each QRS complex (+) with a stable PR interval (0.12 sec). The P waves are positive in leads I, II, …

2024年12月26日 · The QRS complex duration (0.08 sec) and morphology are normal. The QT/QTc intervals are normal (240/350 msec). The axis is rightward between +90° and +180° …

2025年3月21日 · The QRS complex is wide (0.16 sec) because of ventricular capture from the pacing stimulus. ... The axis is indeterminate between -90° and +/-180° (QRS complex …

2024年5月3日 · The QRS complexes have a normal duration (0.08 sec) and there is a normal axis. The QRS complexes have low voltage (< 5 mm in each limb lead and < 10 mm in each …

2024年9月27日 · The axis is extremely leftward between -30° and -90° with a positive QRS complex in lead I and negative QRS complexes in leads II and aVF. There is an initial R wave …

2024年8月19日 · The QRS complex duration is increased (0.16 sec) with a normal axis between 0° and +90° (positive QRS complex in leads I and aVF). The QT/QTc intervals are prolonged …

2024年2月21日 · The QRS complex duration is normal (0.08 sec), and the axis is normal between 0° and +90°. The QRS complex is positive in leads I and aVF. The S wave in lead V2 ( [ ) is 22 …

2018年10月2日 · The QRS complex duration is normal with a normal axis between 0° and +90° (positive QRS complex in leads I and aVF). However, the QRS complex morphology is not …