How is posterior wall MI diagnosed?
Posterior infarction is diagnosed based on the presence of ST segment elevation >0.5mm in leads V7-9. Note that there is also some inferior STE in leads III and aVF (but no Q wave formation) suggesting early inferior involvement.
What ECG findings is suggestive of myocardial infarction?
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 the hallmark of myocardial infarction?
Clinically, MI is a syndrome that can be recognized by a set of symptoms, chest pain being the hallmark of these symptoms in most cases, supported by biochemical laboratory changes, electrocardiographic (ECG) changes, or findings on imaging modalities able to detect myocardial injury and necrosis.
How do you tell if a STEMI is anterior or posterior?
Main ECG pointers for Posterior STEMI:
- Look for deep (>2mm) and horizontal ST-segment depression in the anterior leads and large anterior R-waves (bigger than the S-wave in V2).
- Posterior STEMI often occurs along with an inferior or lateral STEMI, but can also occur in isolation.
Does an EKG show prior heart attacks?
An EKG can potentially detect that you had a heart attack years ago without knowing it. Abnormal electrical patterns during the test suggest that part of your heart may have been damaged from lack of oxygen. Not all heart attacks produce noticeable symptoms.
What does ischemia look like on EKG?
The most common ECG sign of myocardial ischemia is flat or down-sloping ST-segment depression of 1.0 mm or greater. This report draws attention to other much less common, but possibly equally important, ECG manifestations of myocardial ischemia.
Which leads show anterior MI?
The ECG findings of an acute anterior myocardial infarction wall include: ST segment elevation in the anterior leads (V3 and V4) at the J point and sometimes in the septal or lateral leads, depending on the extent of the MI. This ST segment elevation is concave downward and frequently overwhelms the T wave.