ECG & The Heart

Question 0

Systole

Answer 0

1. Ventricles contract
2. Semilunar valves open
3. AV valves close

Question 1

Atrial Kick

Answer 1

1. The atria contributes as much as 30% to the output of blood from the heart

Question 2

Diastole

Answer 2

1. Ventricles refill again from the atria
2. AV valves are open
3. Semilunar valves are closed

Question 3

Pathologic Q Waves

Answer 3

1. A sign of previous myocardial infarction has occurred

Question 4

Absolute Refractory Period

Answer 4

1. The interval from the beginning of the QRS complex to the apex of the T wave is referred to as the absolute refractory period

Question 5

Relative Refractory Period

Answer 5

1. The last half of the T wave is the relative refractory period (or vulnerable period)

Question 6

U wave

Answer 6

1. Always follow the T wave
2. If they are too prominent, suspect:
   - Hypokalemia
   - Hypercalcemia
   - Hyperthyroidism

Question 7

What do the Boxes represent on an EKG??

Answer 7

1. 1 small box = .04 seconds

2. 1 large box = .20 seconds

Question 8

Calculating HR from an EKG

-Regular Rhythm

Answer 8

• 300 divided by (How many LARGE squares are between R waves)
  12: 00 minutes on video

Question 9

Normal Sinus Rhythm TEST

-Criteria to call it ‘Normal’

Answer 9

1. P-wave before each QRS with an interval of .12 to .20 seconds (3 small boxes to 5 small boxes) in duration
2. A QRS width of .04 to .12 seconds (1 small box to 3 small boxes)
3. Q-T Interval of less than .40 seconds (less than 2 large boxes)
4. Normal Rate of sinus rhythm is 60-100 BPM

Question 10

Sinus Bradycardia

Answer 10

1. Everything the same as normal sinus rhythm except that the rate is less than 60 BPM

Question 11

Sinus Tachycardia

Answer 11

1. Rate is between 100-150 BPM

2. Everything else is normal

Question 12

Sinus Arrhythmias

Answer 12

1. Everything is normal except for PERIODIC IRREGULARITY

Question 13

53:50

Answer 13

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