What ECG changes can occur with an Anteroseptal STEMI?
Changes in ECG in patients may include ST depression, transient ST-elevation, new T-wave inversions, or even Q-waves. Anteroseptal MI on ECG usually is characterized by the presence of ST-elevations in V1-V3 leads acutely followed by the development of Q waves in V1-V3 precordial leads.
Which ECG tracing indicates presence of MI?
One of the most significant findings of myocardial infarction is the presence of ST segment elevation. The ST segment is the part of the ECG tracing that starts at the end of the S wave and ends at the beginning of the T wave. The point where the end of the Q wave and the ST segment meet is called the J point.
What is Anteroseptal STEMI?
Anteroseptal myocardial infarction is defined by the presence of electrocardiographic Q-waves limited to precordial leads V1 to V2, V3, or V4. We sought to determine whether this term is appropriate by correlating electrocardiographic, echocardiographic, and angiographic findings.
Which characteristics are typically represented on the ECG during a STEMI?
In STEMI, typical ST-segment elevation persists for hours and is followed by inversion of T waves during the first few days and by the development of Q waves.
What are the signs and symptoms of a STEMI?
Signs and symptoms of a STEMI include:
- Chest pain or discomfort.
- Shortness of breath.
- Dizziness or light-headedness.
- Nausea or vomiting.
- Diaphoresis (sweatiness) unexplained by ambient temperature.
- Palpitations (uncomfortable awareness of the heart beat)
- Anxiety or a feeling of impending doom.
What is pathological Q wave?
Q waves are considered pathological if: > 40 ms (1 mm) wide. > 2 mm deep. > 25% of depth of QRS complex. Seen in leads V1-3.
Does STEMI affect basal anteroseptal segment?
Background: Anteroseptal ST elevation myocardial infarction (STEMI) is traditionally defined on the electrocardiogram (ECG) by ST elevation (STE) in leads V1-V3, with or without involvement of lead V4. It is commonly taught that such infarcts affect the basal anteroseptal myocardial segment.
What is hyperacute anteroseptal STEMI?
Hyperacute Anteroseptal STEMI. ST elevation is maximal in the anteroseptal leads (V1-4). Q waves are present in the septal leads (V1-2). There is also some subtle STE in I, aVL and V5, with reciprocal ST depression in lead III. There are hyperacute (peaked ) T waves in V2-4.
Which EKG findings are characteristic of anteroseptal myocardial infarction?
EKG findings of Q waves or ST changes in the precordial leads V1-V2 define the presentation of anteroseptal myocardial infarction. The patients who had an MI with EKG changes in V1-V2 or to V3 or V4, the autopsy report found out that the infarction involved the majority of the basal anterior septum.[1] This nomenclature was in use until recently.
What are the ECG features of anterior STEMI?
ECG Features of Anterior STEMI ST segment elevation with subsequent Q wave formation in precordial leads (V1-6) +/- high lateral leads. These changes are often preceded by hyperacute T waves Reciprocal ST depression in inferior leads (mainly III and aVF)