2024年10月8日 · ST elevation in aVR with co-existent multi-lead ST depression indicates subendocardial ischaemia due to O2 supply/demand mismatch. ST elevation in aVR can also be seen in the context of anterior STEMI due to LAD occlusion proximal to the first septal branch, causing infarction of the basal septum.

Lead aVR is valuable in stress testing because it represents electrical forces oriented toward the cavity of the heart. It has been shown that exercise-induced ST depression in V 5 and concomitant ST elevation in aVR may detect significant left anterior descending coronary artery stenosis in patients with single-vessel disease .

Lead aVL, I and –aVR are called lateral limb leads, because they primarily observe the lateral wall of the left ventricle. Note that lead aVR differs from lead –aVR (discussed below). All six limb leads are presented in a coordinate system, which the …

Lead aVR, an augmented and unipolar limb lead, was constructed to obtain specific information from the right upper portion of the heart, including the outflow tract of the right ventricle and the basal portion of the interventricular septum. However, lead …

Lead aVR is an augmented unipolar limb lead in which the positive electrode is on the right arm. aVR offers no specific view of the left ventricle and this is why it is mostly an ignored lead. Nonetheless, the P‐QRS‐ST‐T in lead aVR is often characteristic in various conditions.

2024年7月11日 · Clinical Significance of AVR Lead. The AVR lead plays a significant role in diagnosing specific cardiac conditions. One of its most important applications is in the detection of right ventricular hypertrophy. A prominent R wave in AVR, especially when accompanied by right axis deviation, can be indicative of this condition.

2001年11月1日 · In this issue of the Journal, Yamaji et al. report on the use of lead aVR in the diagnosis of acute left main coronary artery (LMCA) obstruction. More specifically, the investigators compare the behavior of the ST-segment in lead aVR with lead V 1 in that situation.

To obtain lead –aVR, the exploring and the reference points must switch positions so that lead –aVR is equal to aVR upside-down. It turns out that the use of lead –aVR is meaningful, as it facilitates ECG interpretation (e.g. interpretation of myocardial ischemia and electrical axis).

2025年2月21日 · Lead aVR STE and multi-lead ST depression represent global sub-endomyocardial ischemia caused by multivessel disease. 1 Widespread ST depression produces a reciprocal change in aVR, which is electrically opposite to the lateral and precordial leads. Other causes of aVR STE include acute LM, proximal LAD, or RCA occlusion and atrioventricular re ...

2001年11月1日 · Value of lead aVR in predicting acute occlusion of proximal left anterior descending coronary artery and in-hospital outcome in ST-elevation myocardial infarction: an electrocardiographic predictor of poor prognosis