EKG

Question 1

P wave

Answer 1

Atrial depolarization

Question 2

QRS complex

Answer 2

Ventricular Depolarization

Question 3

T wave

Answer 3

Ventricular Repolarization

Question 4

QT interval

Answer 4

total duration of ventricular depolarization/repolarization, the duration of the action potential

Question 5

PR Interval

Answer 5

the delay of conduction over the AV node due to the lack of Na channels, allows atria to contract before ventricles

Question 6

3 Types of AV blocks

Answer 6

1st degree: all currents get through but are delayed
2nd degree: most currents get through but occasionally a QRS is missed
3rd degree: no currents get through, atrial and ventricular contractions are no longer synced

Question 7

Right BBB

Answer 7

Slow conduction in the RV, widens QRS

Question 8

Left BBB

Answer 8

Slow conduction in the LV, widens QRS

Question 9

Fascicular Blocks

Answer 9

Delayed conduction to portion of LV but QRS is normal

Question 10

3 conduction disturbances that cause arrhythmias

Answer 10

Abnormal reentry pathways, ectopic foci, triggered activity