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).

2024年8月23日 · How to Read an EKG/ECG How do you know when you need to act immediately or can wait for expert consultation? Here are seven tips to help you gain confidence in interpreting what you see.

2024年7月11日 · In a normal ECG, the AVR lead typically shows a negative P wave, a negative QRS complex, and a positive T wave. This pattern is due to the lead’s position relative to the heart’s main vector of depolarization. The information provided by AVR is crucial in several aspects of cardiac diagnosis.

Whether lead aVR or –aVR is presented depends on national traditions. In the US lead, aVR is used more frequently than –aVR. However, all modern ECG machines are capable of presenting both aVR and –aVR, and it is recommended that –aVR be used since it …

2020年3月10日 · In this ECG Cases blog we look at 10 patients who presented with acute symptoms, whose ECGs revealed the "STEMI-equivalent" pattern of ST elevation in aVR with diffuse ST depression. Which had acute coronary occlusion?

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 ). Limb leads: I, II, III, IV, V, and VI

Augmented leads (aVR, aVF, and aVL) were developed to derive more localized information looking at the right, lower, and left part of the heart respectively. Specifically, lead aVR obtains …

Electrode positions on an ECG (EKG). When electrical activity (or depolarisation) travels towards a lead, the deflection is net positive. When the activity travels away from the lead the deflection is net negative.

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).