atrioventricular block/ heart block

Question 1

what are the types of AV block

Answer 1

1st degree
2nd degree Mobitz type 1
2nd degree Mobitz type 2
3rd degree

Question 2

describe 1st degree heart block

Answer 2

PR interval greater than 0.2 seconds (5 small squares)

Question 3

what can 1st degree heart block be a sign of

Answer 3

coronary artery disease
acute rheumatic carditis
digoxin toxicity
electrolyte disturbance

Question 4

what is the treatment for 1st degree heart block

Answer 4

none usually required but long term follow-up recommended

Question 5

describe 2nd degree heart block

Answer 5

intermittent absence of QRS complexes

Question 6

what does 2nd degree heart block indicate

Answer 6

blockage between the AVN and ventricles

Question 7

describe ECG findings in 2nd degree heart block Mobitz type 1

Answer 7

progressive lengthening of the PR interval, eventually resulting in a dropped QRS

Question 8

who is at risk of 2nd degree heart block Mobitz type 1

Answer 8

often a normal variant

seen in pts with high vagal tone without any evidence of structural heart disease

Question 9

describe 2nd degree heart block Mobitz type 2

Answer 9

each p wave is associated with a QRS complex until there is one p wave not followed by a QRS

often progresses to 3rd degree heart block