Sinus bradycardia and sinus tachycardia

Question 1

Answer 1

Count boxes between R-R to see if regular conduction
Regular P wave indicates functional SAN (upright in lead II and downward in aVR)
P wave present for every QRS = AV association
Wide QRS (more than 3 small little boxes)

Mnemonic for RBBB
MARROW ((M = V1-V3) RR in the middle and W (V5-V6)

Question 2

Answer 2

In sinus tachycardia the T and P waves will mush together.
Requires slowing down the heart to acquire definitive differentiation between T and P wave. Either do valsalva manouvre or drugs to slow down heart.

Question 3

What are the 3 conditions that can cause tachycardic narrow regular pattern?

Answer 3

• Sinus tachycardia
• SVT
• Atrial flutter