such that the atrial vector in the frontal plane is directed towards lead II (provided that the impulse originates in the sinoatrial node). Consequently, the P wave is always positive in lead II during sinus rhythm. The P wave is most often also positive in leads aVL, -aVR, aVF, I, ...
Background Currently, normal values for electrocardiogram (ECG) measurements are not well established for patients 18 to 35 years old. We sought to develop normal values for this patient population so diagnostic criteria for abnormal ECGs in this age group can be better established. Methods We ...
The limb leads record the ECG in the coronal plane, and so can be used to determine the electrical axis (which is usually measured only in the coronal plane). The limb leads are called leads I, II, III, AVR, AVL and AVF. Figure 2 shows the...
Diffuse ST depression with ST elevation in aVR: Is this pattern specific for global ischemia due to left main coronary artery disease? Background and Purpose We assess whether the electrocardiographic (ECG) pattern of \\\{ST\\\} depression in >聽7 body surface leads combined with \\\{ST.....
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One thousand nine hundred thirty-five subjects in two normal populations were analyzed, and the 98th percentile of the positive T wave amplitude for each ECG lead (including-aVR) was considered the upper limit of normal. Normal T wave amplitude was two times greater in the precordial than in...
P waves were predominately positive in standard bipolar lead II. In leads I, II, III, and aVF, the dominant pattern of the QRS complexes was rS, whereas in leads aVR and aVL the pattern was always qR. T waves were predominately positive in lead II. The average degree of MEA was -...
Standard 6-lead electrocardiography (leads I, II, III, aVR, aVL, and aVF) were obtained in hedgehogs positioned in right lateral recumbency. All recorded rhythms were regular sinus rhythm and the mean heart rate was 264 ± 53 beats per minute. Mean electrical axis was between −19° and...
One thousand nine hundred thirty-five subjects in two normal populations were analyzed, and the 98th percentile of the positive T wave amplitude for each ECG lead (including -aVR) was considered the upper limit of normal. Normal T wave amplitude was two times greater in the precordial than ...