What ECG leads correspond to which coronary arteries?
What ECG leads correspond to which coronary arteries?
ECG Changes during Myocardial Infarction (MI)
| Location of MI | Leads Affected | Vessel Involved |
|---|---|---|
| Inferior wall | II, III, aVF | Right Coronary Artery (RCA) – Posterior descending branch |
| Posterior wall | V1 to V4 | Left Coronary Artery (LCA) – Circumflex branch Right Coronary Artery (RCA) – Posterior descending branch |
What does CAD look like on ECG?
The most characteristic finding is abnormally large Q waves (referred to as pathological Q waves). Other common findings are reduced R-wave amplitude (due to loss of viable myocardium) and fragmented or notched QRS complexes. ECG changes in myocardial ischemia and infarction will be discussed in great detail.
Which leads for which artery?
Table 1: Localization of ischemic area in ST Elevation Myocardial Infarction (STEMI/STE-ACS)
| Leads with ST segment elevations | Affected myocardial area | Occluded coronary artery (cuprit) |
|---|---|---|
| V3–V4 | Anterior | LAD. |
| V5–V6 | Apical | Distal LAD, LCx or RCA. |
| I, aVL | Lateral | LCx. |
| II, aVF, III | Inferior | 90% RCA. 10% LCx. |
Where do coronary arteries lead?
the heart muscle
Coronary arteries supply blood to the heart muscle. Like all other tissues in the body, the heart muscle needs oxygen-rich blood to function. Also, oxygen-depleted blood must be carried away. The coronary arteries wrap around the outside of the heart.
Can coronary artery disease be seen on ECG?
Coronary artery disease, also called atherosclerotic heart disease, interferes with how the blood flows – and an EKG can detect this issue. In the case of an enlarged heart, narrowing of the arteries can also be detected.
Does CAD Show on ECG?
Because a resting EKG often produces a “normal” reading for someone with angina, doctors may need to perform a stress test to evaluate the presence of Coronary Artery Disease. If characteristic signs occur during stress testing, especially if typical chest pains occur, the test is considered “positive”.
How do you read a mnemonic on an ECG?
They are looking at the electrical activity. Mnemonic: Rhythm, Rate, I AM P-QRS-T: Rhythm, Rate, Ischemia or Infarction, Axis, Morphology, P-QRS-T intervals and individual waves. V1-V3 is the best place to look at QRS morphology.
