EKG practice

Question 1

PAC
p wave
rate
reason

Answer 1

• p wave: diff shape
• rate: depends on underlying sinnus rate
  reason: etpic focus fires early in atria producing one early beat

Question 2

SVT
p wave
rate
reason

Answer 2

pwave: etpoic focus is different
rate: 100-180
reason: an irritable focus in atira over rides and fires repetitively at a rapid rate

Question 3

atrial flutter
rate
p wave
QRS
reason

Answer 3

rate: atrial=250-350, vent=125-175
p wave: not present
QRS: normal
reason: one etopic cell in atira firing rapidily to override sinus node

Question 4

atrial fibrillation
rate
p wave
QRS
reason

Answer 4

rate: 400-700
p wave: none chaotic atrial activity
QRS: normal
reason: multiple cells firing in atria to override sinus node causing repetitive un coordinated depols

Question 5

PVC
rate
p wave
QRS
reaon

Answer 5

rate: depends on underlying rhythm
p wave: not present during PVC
QRS: wide
reason: one etopic cell in ventriucle fires produing one early beat

Question 6

ventricular tachycardia
rate
p wave
QRS
reason

Answer 6

rate: 100-200
p wave: none
QRS: wide but not normal
reason: multiple foci ventrivles initiate uncoordinated chaotic depols causing fibrillations not contractions