Electrocardiography

Question 1

Most common cause of SCD?

Answer 1

Vent fib

Question 2

Most appropriate tx for a pt resuscitated from cardiac arrest?

Answer 2

ICD

Question 3

Primary vector in the heart?

Answer 3

LV

Question 4

If EKG electrode is perpendicular to electrical activity, you get?

Answer 4

Straight line

Question 5

If EKG electrode is parallel and same direction you get?

Answer 5

Positive deflection

Question 6

If EKG electrode is parallel and opposite direction from electrical activity, you get?

Answer 6

Negative deflection

Question 7

Prolonged PR interval?

Answer 7

AV block

Question 8

Elevated ST?

Answer 8

MI

Question 9

1 cause of ventricular hypertrophy?

Answer 9

HTN

Question 10

Wide QRS implies?

Answer 10

Pathologic bundle branch block

Question 11

A Q wave is physiological but can imply?

Answer 11

Past MI

Question 12

Enhanced automaticity means?

Answer 12

There is a depol outside of the normal sequence of events (a cell “fires” before its time)

Question 13

Bigtime cause of arrhythmia generation

Answer 13

Alteration of phase 4 AP. Phase 4 is raise to a level where it does not belong

Question 14

In order to have cardiac re-entry, you must have what 3 things?

Answer 14

1. Contiguous pathway with loop circuit
2. Unidirecitonal block
3. Different conduction velocities

Question 15

Where is the re-entrant site of supraventricular tachycardia (SVT)?

Answer 15

Atria

Question 16

Re-entrant site of vent tachy?

Answer 16

Ventricle