EKG takeaways wk 1

Question 1

What represents the depolarization of the ventricles on the EKG?

Answer 1

QRS complex

Question 2

What does the ST segment represent?

Answer 2

Ventricular refractory period
[atrial is PR segment]

Question 3

What 3 leads constitute looking at the heart from an inferior prospective?

Answer 3

II, III, aVF

Question 4

One small box on the EKG represents what duration?

Answer 4

0.04 sec

Question 5

10 small boxes (2 large boxes) is equal to how many millivolts (mv)?

Answer 5

1.0 mV

Question 6

1) A wave of depolarization (mean vector or electrical axis) toward a positive lead is represented graphically as what?
2) What abt repolarization toward a lead?

Answer 6

1) A positive (upward) deflection
2) A negative (downward) deflection