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An ECG is often considered "uninterpretable" in the presence of LBBB. This is in fact false. There are many things that we can interpret on an ECG despite LBBB.

Clinicians can determine rate and rhythm. The LBBB only affects the left ventricle making any part of the QRS and ST segment uninterpretable, but the atrial rhythm is still valid.

In the setting of acute myocardial infarction, there are a set of criteria called Sgarbossa criteria which can be applied to the ECG to increase predictive value for or against myocardial infarction. These criteria are not as good as ST-segment elevation in the absence of LBBB. Their sensitivity is only 49%, but specificity is greater than 90%.

Three or more points means acute myocardial infarction.

Modified Sgarbossa criteria were validated in 2015. The sensitivity of the modified criteria increases to 80% without affecting specificity. The third criteria regarding greater than 5 mm of discordance were chosen rather arbitrarily. The modified criteria change 5 mm to greater than 25% of the downward QRS deflection.

Criteria 3 is modified as follows: Discordant ST elevation greater than 25% of downward QRS deflection in a negative QRS complex (2 points)

Definition of Terms

Concordant: Means QRS and T wave go the same direction.

Discordant: Means QRS is opposite direction of T wave.

Positive QRS Complex: Net voltage of QRS goes upward from baseline.


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which leads show lbbb?

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Main usage of Angilos AM 50mg/5mg Tablet is for Hypertension (high blood pressure).

Angilos AM 50mg/5mg Tablet

Both of the medicines in this combination work to lower blood pressure but in different ways. Together they help to relax blood vessels and make it easier for your heart to pump blood around your body. This lowers blood pressure. If your blood pressure is controlled you are less at risk of having a heart attack, stroke, or kidney problems. The medicine must be taken regularly as prescribed to be effective. You do not usually feel any direct benefit from taking this medicine, but it works in the long term to keep you well.


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Why Angilos AM 50mg/5mg Tablet is used?


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