Heart block

Question 1

describe 1st degree AV block

Answer 1

PR interval longer than normal

Question 2

describe the treatment of 1st degree AV block

Answer 2

no treatment, long term follow up recommended

Question 3

what are the 2 different types of 2nd degree AV block

Answer 3

Mobitz I and Mobitz II

Question 4

describe Mobitz I AV block

Answer 4

progressive lengthening of PR interval until it drops a beat

Question 5

describe Mobitz II AV block

Answer 5

some missing P waves

Question 6

what other name is used for Mobitz I AV block

Answer 6

Wenckebach block

Question 7

describe 3rd degree AV block

Answer 7

complete heart block, no action potentials from the SA node/atria get through

Question 8

describe the usual QRS complex seen in Mobitz II

Answer 8

wide complex, >0.12s

Question 9

what length of PR interval is seen in 1st degree heart block, and describe the QRS complex

Answer 9

PR interval = >0.2s

QRS is normal

Question 10

what is a bundle branch block

Answer 10

a block in one of the 2 main branches coming off the bundle of His

Question 11

describe the ECG in LBBB

Answer 11

V1 = W V6 = M

remember WilliaM MarroW, william on left

Question 12

describe the ECG in RBBB

Answer 12

V1 = M V6 = W

remember WilliaM MarroW, marrow on right