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.

Studies by Engelen et al (14) found that in acute anterior myocardial infarction, the ECG is a useful tool to predict the likely left anterior descending coronary artery (LAD) occlusion site. They found that ST segment elevation in aVR strongly predicted LAD occlusion proximal to the first septal perforator (Figure 1).

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 …

2024年8月23日 · An EKG/ECG is a representation of the electrical activity of the heart muscle as it changes with time, usually printed on paper for easier analysis. The EKG/ECG is a printed capture of a brief moment in time. A 12-lead EKG is considered the gold standard; however, a 4-lead EKG can also diagnose different heart conditions.

2024年7月11日 · The AVR lead, often overlooked in ECG interpretation, holds significant diagnostic value. Its unique perspective on the heart’s electrical activity complements other leads and provides crucial information for accurate cardiac diagnosis.

The 12-lead electrocardiogram (ECG) is a crucial tool in the diagnosis and risk stratification of acute coronary syndrome (ACS). Unlike other 11 leads, lead aVR has been long neglected until recent years. However, recent investigations have shown ...

Lead aVR is the only lead in the surface ECG that does not face the “typically” relevant walls of the left ventricle. Historically, its value has been neglected most likely due to its unusual configuration and direction, which appeared to have little correlation with other more congruous and easily diagnostic frontal leads.

Explore ECG insights on Ventricular Tachycardia using the aVR Algorithm, its clinical applications, limitations, and depolarization patterns in VT and aberrant SVT.

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). All modern ECG machines can present either aVR or –aVR; we recommend that –aVR be used as it facilitates ECG interpretation.

For a routine analysis of the heart’s electrical activity an ECG recorded from 12 separate leads is used. A 12-lead ECG consists of three bipolar limb leads (I, II, and III), the unipolar limb leads (AVR, AVL, and AVF), and six unipolar chest leads, also called precordial or V leads, (, , , , , and ). Chest leads: , , , , , and .