Tachyarrhythmia Detection

What are some reasons tachyarrhythmia detection would be turned off?

EP Studies. Emergency therapies. Surgery.

Label the correct order of AT/AF detection

1. Detection

2. Termination

3. Redetection

4. Therapy

5. Onset

5; 1; 4; 3; 2

Choose the correct answer to make the statement true.

When sensed beats fall in the VT monitor zone, (15, 16, 18) beats need to occur in dual chamber devices and the ventricular rate must be (faster than, slower than, equal to) the atrial rate to be stored as a VT monitor episode. In single chamber devices, (16, 18, 20) intervals must be met to store a VT monitor episode.

16; faster than; 20

What does suspending detection impact?

AT/AF episodes. VT monitor episodes

What happens at AT/AF Detection?

An AT/AF Episode is recorded

1.        Match the description with the types of episodes the device can record.                                           

 VT-Monitor

Fast A&V

SVT

VT-NS                      

1.  Used when the device detects sinus tach or AT/AF                       

  2. Ventricular rate is in the monitor zone and the atrial rate is ≥ the ventricular rate                          

  3.  When the number of initial beats to detect is reached, an episode is stored                         

  4.  ≥ 5 but < 16 or 20

events are in the VT monitor zone

3; 2; 1; 4

What are the requirements for AT/AF detection to be met in a pacemaker?

Two atrial sensed events per ventricular event for 32 intervals. Median of the 12 most recent A-A intervals is ≤ the programmed AT/AF detection interval

Label the Suspend/Resume button with the correct description.

Enables detection to continue

Pauses detection if initial detection hasn’t occurred

Resume; Suspend

What are the requirements for AT/AF episode termination?

Five consecutive intervals of 1:1 conduction longer than the AT/AF interval.