Heart Blocks

Question 1

PR interval greater than 0.20 seconds, R-R interval is regular; not treated unless symptomatic

Answer 1

first degree

Question 2

atrial rate is greater than ventricular rate, R-R interval is irregular, PR interval lengthens until a P wave is blocked (no QRS following)

Answer 2

second degree, Mobitz type I

Question 3

atrial rate > ventricular rate, no consistent pattern to blocking the P wave, PR is consistent when present, R-R interval irregular

Answer 3

second degree, Mobitz type II

Question 4

PR interval varies, R-R interval regular, QRS may be widened

Answer 4

third degree, complete

Question 5

which heart block require emergency treatment?

Answer 5

third degree

Question 6

treatment for second and third degree heart blocks

Answer 6

atropine, dopamine, epi, transcutaneous pacemaker, permanent pacemaker insertion