l4 ex 2

Question 1

What is repolarizaton?

Answer 1

REST

Question 2

What is depolarization?

Answer 2

STIMULATION CONTRACTION

Question 3

1) What does one small box represent?
2) What does 5 small boxes represent?
3) What does one LARGE box represent?
4) How many LARGE boxes makes a second?

Answer 3

1. 0.04 seconds
2. 0.20 seconds
3. 1 large box= 0.20 seconds
4. 5 large boxes makes 1 second

Question 4

How long is a 6 second strip?

Answer 4

30 big boxes!

Question 5

1. How do you measure the PR interval?
2. What is normal?

Answer 5

1. Measure from the beginning of the P wave to the beginning of QRS and count the number of small squares and multiply by 0.04 seconds
2. Normal= 0.12-0.20 seconds

Question 6

1. What rhythm is it?
2. Is this a normal rhythm? If not, what causes it?

Answer 6

1. ARTIFACT
2. caused by: malfunctioning electrodes, patient movement, improper grounding, equipment failure

Question 7

What rhythm is this?

Answer 7

Normal sinus rhythm

Question 8

What rhythm is this?

Answer 8

sinus bradycardia

Question 9

What are signs and symptoms of decreased cardiac output? (LIST THEM)

Answer 9

Hypotension

syncope

exercise intolerance

weakness

fatigue

dizzy/lightheaded

cold, clammy skin

anxiety

chest pain

altered mental status

Question 10

What causes sinus bradycardia?

Answer 10

Drugs: BB, CCB, morphine, Dig

Increased ICP

sudden movement from lying to standing

decreased metabolic rate

infectious diseases

ACIDOSIS (think slow ASSidosis)

Hypovoleia

Hypoglyemia

Cardiac tamponade

Question 11

When do we treat bradycardia?

How do we treat it?

Answer 11

When symptomatic; diaphoresis, chest pain, hypotension, decreased urine output, dyspnea, decreased LOC

Oxygen, IV, atropine, epi, dopamine