Trouble Shooting Flashcards
1
Q
What could cause loss of capture or an increase in pacing thresholds?
A
- lead fracture/failure
- perforation/dislodgment
- battery depletion
- loose set screw
- fibrosis
- drug interactions
- e-lyte imbalances
- ischemia or MI
2
Q
What are possible causes of inappropriate shock delivery?
A
- conducted AF
- sinus tach
- SVT
- T-wave oversensing
- myopotentials
- lead fracture
- FF atrial sensing in ventricular lead (crosstalk)
- noise
- connector issue
3
Q
What are possible causes of under/oversensing?
A
- lead fracture/insulation breach
- perforation
- drug interactions
- e-lyte imbalances
- ischemia or MI
- connector issue
- FF sensing (crosstalk)
- sub-optimal programming
4
Q
What are possible causes for an abnormal decrease in lead impedance?
A
- lead insulation breach
- perforation/dislodgment
- connector issue
5
Q
What are possible causes for an abnormal increase in lead impedance?
A
- lead fracture
- perforation
- connector issue
- fibrosis
- progression of cardiac disease
6
Q
What could a high number on the Sensing Integrity Counter mean?
A
- oversensing
- lead fracture
- loose setscrew
7
Q
What are 3 ways to attempt to reproduce a cardiac device problem?
A
- pocket manipulation
- have patient perform isometric exercises
- have patient change body positions
8
Q
Which of true below would you expect to see on the rate histogram if the patient is in AF the majority of the time?
1) V. Rate > V. Rate during AF
2) V. Rate < V. Rate during AF
3) V. Rate = V. Rate during AF
A
3 - will see the V. Rate = V. Rate during AF
