Acute anterolateral MI. Acute anterolateral MI is recongnized by ST segment elevation
in leads I, aVL and the precordial leads
overlying the anterior and lateral surfaces of the heart (V3 – V6).
Which leads are anterior leads?
The arrangement of the leads produces the following anatomical relationships: leads II, III, and aVF view the inferior surface of the heart;
leads V1 to V4
view the anterior surface; leads I, aVL, V5, and V6 view the lateral surface; and leads V1 and aVR look through the right atrium directly into the cavity of the …
Where is an anterolateral stemi?
Anterolateral STEMI:
ST elevation is
present in the anterior (V2-4) and lateral leads (I, aVL, V5-6)
. Q waves are present in both the anterior and lateral leads, most prominently in V2-4. There is reciprocal ST depression in the inferior leads (III and aVF).
What is anterolateral MI?
Myocardial infarction in which
the anterior wall of the heart is involved
. Anterior wall myocardial infarction is often caused by occlusion of the left anterior descending coronary artery. It can be categorized as anteroseptal or anterolateral wall myocardial infarction. [ MESH:D056988 ]
Which ECG leads show anterior MI?
When there is not only anterior ST segment elevation
(V3 and V4)
, but also septal (V1 and V2) and lateral (V5, V6, lead I and lead aVL), an “extensive anterior” MI is said to be present.
Why do they call it a 12-lead ECG?
The 12-lead ECG displays, as the name implies, 12 leads which are derived by means of 10 electrodes. Three of these leads are easy to understand, since they are simply the
result of comparing electrical potentials recorded by two electrodes
; one electrode is exploring, while the other is a reference electrode.
What does anterior myocardial infarction mean?
An anterior wall myocardial infarction occurs
when anterior myocardial tissue usually supplied by the left anterior descending coronary artery suffers injury
due to lack of blood supply.
What is Wellens syndrome?
Wellens syndrome describes
a pattern of electrocardiographic (ECG) changes
, particularly deeply inverted or biphasic T waves in leads V2-V3, that is highly specific for critical, proximal stenosis of the left anterior descending (LAD) coronary artery. It is alternatively known as anterior, descending, T-wave syndrome.
Which artery is blocked in a lateral MI?
Isolated lateral wall myocardial infarction (LMI), similar to other acute myocardial infarctions (MI), is caused by acute atherosclerotic plaque rupture with subsequent thrombus formation in
the left circumflex (LCx) coronary artery
or one of its branches.
When should you suspect posterior MI?
Suspicion for a posterior MI must remain high, especially
if inferior ST segment elevation is also present
. ST segment elevation in the inferior leads (II, III and aVF) if an inferior MI is also present.
What are the signs of old myocardial infarction?
| Myocardial infarction | Specialty Cardiology, emergency medicine | Symptoms Chest pain, shortness of breath, nausea, feeling faint, cold sweat, feeling tired; arm, neck, back, jaw, or stomach pain | Complications Heart failure, irregular heartbeat, cardiogenic shock, cardiac arrest | Causes Usually coronary artery disease |
|---|
What is anterior wall of heart?
Left anterior descending artery
, which supplies blood to the front (anterior wall) and part of the side (anterolateral wall) of the left ventricle, to the top of the left ventricle, and to most of the wall between the ventricles (interventricular septum).
What are the most common complications seen with an anterior wall MI?
- Cardiogenic shock: Cardiogenic shock complicating anterior MI is associated with higher hospital mortality when compared to inferior MI.[21]
- Left ventricular dysfunction.
- Left ventricular mural thrombus. …
- Ventricular septal rupture.
- Free wall rupture.
- Pericardial effusion from free wall rupture.
Is anterior infarct serious?
In the United States, between 1.2 and 1.5 million people suffer a myocardial infarction (MI) every year. And among MIs,
anterior-wall MIs are the most serious
and have the worst prognosis.
What are the types of MI?
A heart attack is also known as a myocardial infarction. The three types of heart attacks are:
ST segment elevation myocardial infarction (STEMI) non-ST segment elevation myocardial infarction (NSTEMI)
Which leads are inferior MI?
12-lead electrocardiogram (ECG) demonstrating evidence of inferior myocardial infarction (MI).
ST-elevation is seen in leads II, III and aVF
. Reciprocal changes can be seen in leads I, aVL, V2 and V3. There is also some ST-elevation in leads V5 and V6.
