ECG Testing

Question 1

When is a fibrillation seen on ECG?

Answer 1

2-3 weeks after injury

Question 2

What is a fasciculation? What is it a sign of and what conditions is it commonly seen in?

Answer 2

• spontaneous, repetitive, twitch-like contractions of the examined muscle at rest
• sign of LMN
• commonly seen w/ chronic conditions

Question 3

What does a fibrillation suggest on ECG?

Answer 3

suggests there is a LMN problem
- degenerating muscle (associated w/ a single muscle fiber)

Question 4

What is a positive sharp wave?

Answer 4

• looks like a downward QRS complex and associated w/ a fibrillation

Question 5

complex repetitive discharge

Answer 5

• polyphasic high frequency waveforms that are fixed in amplitude and consistent w/ discharge rate
• have an audio component
• indicative of a non-specific chronic condition (chronic nerve entrapment or Marie Charcot tooth)

Question 6

Myokymic vs Myotonic

Answer 6

myokymic - rates together in bunches then a break and again together

myotonic - rates all over the place
- indicative of rare disease and muscle wasting