ECG 7 - Arrhythmias 1

Question 1

arrhythmias begin in one of three places

• ? m, ? m or the ?
• sinus, atrial and nodal/junctional rhythms are known as ?
• sinus rhythm = ? P waves
• atrial rhythms = ? P waves
• junctional =? P waves

-ventricular rhythms give ? and ? QRS complexes

Answer 1

atrial
vent
AVN
supraventricular
normal
abnormal
no
wide + abnormal

Question 2

Bradys

• rhythm control is by whatever part of heart that is ? ? the quickest - usually SAN at 70 bpm
• if SAN fails, control will be assumed by an ? focus (abnormal P waves) or the ? (no p wave at all)
• if these fail or conduction is ?, a ? focus takes over - gives about ? bpm - eg in ? heart block
• these slow, protective rhythms are called ? rhythms
• if ? and then normal rhythm returns, they are termed ? beats

Answer 2

spont depol
atrial
AVN
blocked
vent
30
complete
escape
singular
escape

Question 3

Bradys Mx

• ?-? - treat reversible causes
• assess for adverse features: shock, ?, ? failure, ? ischaemia
• assess for risk of ?: recent asystole, mobitz ? or ? deg HB
• if none of above features present - ? and ?
• if any are present - ? and seek ? help
• -> ? 500mcg ?, repeated up to max of ?mg
• cardiology may then initiate transcut ? prior to more definitive pacing of the heart

Answer 3

A-E
syncope
heart
myocardial
asystole
2
3rd
observe and monitor
treat
expert
atropine
IV
3
pacing

Question 4

Extrasystoles

• when any part of heart depolarizes ? than it should - comes with an ? heart beat
• same ? appearance as an escape beat, but extrasystole comes ? whereas escape beat comes ?

Answer 4

quicker
extra
ECG
early
late

Question 5

Extrasystoles
-if atrial -> ? P wave
-junctional -> ? p waves
in both the QRS complexes are ?
-vent extrasystoles have a ? QRS that can take any shape
-these are ? and usually of no importance, yet if occur early in the T wave of a preceding beat they can induce ? ?

Answer 5

abnormal
no
normal
wide
common
VF