What does an EKG look like during an MI?

What does an EKG look like during an MI?

In the first hours and days after the onset of a myocardial infarction, several changes can be observed on the ECG. First, large peaked T waves (or hyperacute T waves), then ST elevation, then negative T waves and finally pathologic Q waves develop.

What is a full thickness myocardial infarction?

A transmural myocardial infarction refers to a myocardial infarction that involves the full thickness of the myocardium. It was one believed that the development of Q waves indicated the infarction was “transmural;” however, autopsy studies failed to confirm this.

What will the EKG show if he is having an inferior wall MI?

The ECG findings of an acute inferior myocardial infarction include the following: ST segment elevation in the inferior leads (II, III and aVF) Reciprocal ST segment depression in the lateral and/or high lateral leads (I, aVL, V5 and V6)

Can a myocardial infarction be detected in an ECG?

Diagnosis of myocardial infarction is confirmed based on clinical manifestations and electrocardiographic changes along with increased cardiac enzymes. Electrocardiogram (ECG) is one of the safest and easiest methods in the first place.

What indicates MI on ECG?

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.

How is MI diagnosed on ECG?

Turn the ECG upside down, and it would look like a STEMI. The ratio of the R wave to the S wave in leads V1 or V2 is greater than 1. This represents an upside-down Q wave (similar in reason to the ST depression instead of elevation). ST segment elevation in the posterior leads of a posterior ECG (leads V7-V9).

When is an MI considered old?

To report AMI, refer to the following code categories: o Subsequent Myocardial Infarction: Acute myocardial infarction occurring within four weeks (28 days) of a previous acute myocardial infarction, regardless of site. o Old Myocardial Infarction: Reported for any myocardial infarction described as older than four …

What is the difference between transmural MI and subendocardial MI?

The transmural type usually consisted of yellowish-brown coagulation necrosis in the center of an infarcted focus and coagulative myocytolysis at the marginal zone. The subendocardial type was characterized by coagulative myocytolysis throughout the entire focus.

How do you identify inferior MI?

The ECG findings of an inferior ST segment elevation myocardial infarction include:

1. ST segment elevation in the inferior leads (II, III, and aVF) of at least 1 mm.
2. Reciprocal ST segment depression in the lateral and/or high lateral leads (I, aVL, V5 and V6).

How do you read an ECG for MI?

How can you tell if you have posterior MI?

The ECG findings of an acute posterior wall MI include the following: ST segment depression (not elevation) in the septal and anterior precordial leads (V1-V4). This occurs because these ECG leads will see the MI backwards; the leads are placed anteriorly, but the myocardial injury is posterior.

What does an inferior MI ECG look like?

There is not a lot of variation in how an inferior MI looks in regards to shape or ST segments; however, some are more dramatic than others based on the amplitude of ST segment elevation. Also, during an inferior MI, the ST segment elevation is usually concave upwards.

What does an upside down ECG look like?

Turn the ECG upside down, and it would look like a STEMI. The ratio of the R wave to the S wave in leads V1 or V2 is greater than 1. This represents an upside-down Q wave (similar in reason to the ST depression instead of elevation). ST segment elevation in the posterior leads of a posterior ECG (leads V7-V9).

What happens if you miss a ST segment elevation MI on an ECG?

Missing a ST segment elevation MI on the ECG can lead to bad patient outcomes. It’s just not good. So let’s go over the ECG findings in STEMI — again, and again, and again — with multiple examples. This way, you can drill into your memory what each type of STEMI looks like on the 12-lead ECG.

What to look for before reading an EKG?

Before you read the EKG, look for: 1 Patient age: as many values change with age 2 Standardization: full standard is two large squares (1 mV, 10 mm) and half standard is one large square (0.5mV, 5 mm) 3 Paper speed: the standard is 25 mm/sec, the faster the paper speed the slower the HR will look and vice versa