Diagnostics and HM Flashcards
1
Q
Is a drop in thoracic impedance good or bad?
A
Bad = More fluid
2
Q
Which generation shows CRT interrupt
A
Ilivia onwards
3
Q
What ratio of non delivered events must occur before interrupt shows?
A
20-48
4
Q
HR and HRV do what in HF patients
A
HR increase
HRV decrease
5
Q
What 8 things can i see on HM
A
LV IEGM Impedance Thoracic PVCs/h Atrial Burden Activity HRV HR CRT pacing
6
Q
How is HRV calculated?
A
P to P
7
Q
Whats the magic number for CRT success
A
96/97%
8
Q
What do blanks in HRV graph mean?
A
Pacing
9
Q
Most common cause of CRT loss
A
1 Atrial Tach
2 Loss of LV capture
10
Q
Lead I is positive when pacing from…
A
The right
11
Q
Lead III is negative when pacing from…
A
The right
12
Q
Lead III is positive when pacing from…
A
The Left
13
Q
Lead I is negative when pacing from…
A
The left
