QRS Complex (lec 6)

Question 1

Starting point for QRS?

Ending point (J point) for QRS?

Answer 1

point where starts to move away from baseline

point where last wave begin to flatten

Question 2

QRS measurement should include what but not what?

Normal QRS duration?

Answer 2

include entire S wave but not overlap into ST seg or T Wave

max of 0.11 sec

Question 3

Normal QRSC if? (3)

Answer 3

1) rhythm initiated from site above vents
2) conduction progressed His -> R/L bundles -> purkinje
3) normal depol of vents

Question 4

See normal QRSC w/ what types of rhythms?

Answer 4

normal sinus rhythm or

dysrhy initiated above vents

Question 5

Abnormal QRSC result of?

Answer 5

abnorm depol of vents:
pacemaker site can be any of these -

SA node,
atria, 
AV jxn, 
bundle branches, 
purkinje,
vent myocardium

Question 6

Tall QRSC result of?

Answer 6

hypertrophy of vent/s
abn pacemaker
aberrant beat conduction

Question 7

Low volt QRSC result from?

Answer 7

obesity
hypothyroid
precardial effusion

Question 8

Wide-Bizarre QRSC result from?

Answer 8

intravent conduction defect (U bundle branch block)