Baseline testing Flashcards
Pacing at a constant cycle length slightly shorter than the patients spontaneous rhythm then decreasing or increasing cycle length by small steps
Incremental or Decremental pacing
Pacing at a fixed cycle length
Burst pacing
A mapping technique designed to help locate tachycardia focus by pacing at different sites and comparing the morphology
Pace Mapping
Pacing at a cycle length slightly shorter than the tachycardia. If the post pacing interval is short then the catheter is in the reentry circuit
Entrainment Mapping
Drive train typically eight beats followed by 1, 2, 3 premature beats
Extra stimulus pacing
Where is the earliest ventricular activation usually seen?
On the surface ECG
What does the AH measure?
AV node conduction
Normal AH interval
50-120
Normal HV interval
35-55
AERP normal value
180-330
AVNERP normal value
250-400
VERP normal value
180-290
Normal A-A value
600-1200
How do you get the CSNRT?
SNRT-Cycle length
What is the upper normal for CSNRT?
525-550
SACT measurement is used to evaluate what?
SA node exit block
Which ion flow causes the SA and AV node cells to depolarize?
Ca++
What ion flow causes cardiac muscle cells to fire?
Na+
Longest S1-S2 interval that fails to capture the ventricles
VERP
Shortest H1-H2 in response to any A1-A2
AVNERP
Longest A1-A2 interval that fails to achieve atrial capture
AERP
As cycle length decreases the PR interval normally?
Increases
As the cycle length decreases the AH interval normally?
Increases
As cycle length increases the PR interval normally?
Decreases
As cycle length increases the AH interval normally?
Decreases
Measure the onset of the signal deflections to the onset of a following signal deflection
Onset approach
Accurately measures the precise moment when the depolarization wave front passes through the midpoint between electrode pair
Zero-crossover point approach
What are high pass EGMS filtering set at?
30-50
What are low pass EGMs filtering set at?
300-500
What are intracardiac EGMs set at?
30/500
What are surface ECGs set at?
.5/100