2nd degree Atrioventricular block mobitz type 2

Question 1

What is 2nd AVB mobitz type 2

Answer 1

The PR Interval remains constant however there is intermittent conduction of the P-Wave causing missed QRS Complexed.

Question 2

What is 2nd AVB mobitz type 2 caused by?

Answer 2

failure of conduction below the AV node.

Question 3

How do I recognise 2nd AVB mobitz type 2

Answer 3

-More P-waves than QRS complexes

-PR interval may be normal or meet 1AVB criteria

• QRS complex dropped following a P-Wave.

Question 4

What leads will this stuff be present in when a patient has 2nd AVB mobitz type 2 ?

Answer 4

All leads

But check LII and V1

Question 5

Signs and symptoms of 2nd AVB mobitz type 2

Answer 5

Can be asymptomatic

Shock (Pale, cold, clammy skin, hypotension, delayed CRT, tachypnoea, LOC, Anxiety)

Bradycardia

Question 6

what is significance - 2nd AVB mobitz type 2

Answer 6

It is important to detect if the rhythm is 2AVB mobitz type 1 or Mobitz Type 2 as treatment can change locally.

Mobitz type 2 can present in a pattern form. If so it is often classified in ratios - for example if there are 2 P-waves before a QRS complex this is termed 2:1 ratio.

If there are 3 p waves preceding a QRS complex this is a ratio 3:1.