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PM Timing Intervals Flashcards

1
Q

What is the programmable post-ventricular interval during which events sensed in the ventricle do not cause resetting of a timing cycle?

A

Ventricular Refractory period (VR)

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2
Q

in dual-chamber pacing, the period of time (ms) between an atrial event and a scheduled paced ventricular event is?

A

Paced Atrial-Ventricular Delay (PAV)

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3
Q

period during which the pacemaker cannot see any atrial activity?

A

Atrial Blanking period (AB)

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4
Q

an interval during which the device prevents false inhibition by monitoring for non-physiologic ventricular sensed events?

A

Ventricular Safety Period (VSP)

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5
Q

programmable interval during PVARP during which any atrial sensing is blocked?

A

Post Ventricular-Atrial Blanking period (PVAB)

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6
Q

the lowest rate in which pacing will occur in the absence of intrinsic atrial activity?

A

Lower Rate limit (LR)

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7
Q

Consists of the AV interval plus the post ventricular atrial blanking period?

A

Total Atrial Blanking (TAB)

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8
Q

Consists of the Sensed AV interval (SAV) and PVARP?

A

Total Atrial Refractory Period (TARP)

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9
Q

What components make the Total Atrial Refractory period (TARP)?

A

Sensed AV (SAV) interval and PVARP

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10
Q

Total Atrial Refractory Period (TARP) is used for what purpose?

A

used to determine 2:1 block rate and wenkebach behavior of the pacemaker

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11
Q

defines the max rate the PM will pace the ventricles in response to tracking of atrial events?

A
  • Upper Tracking Rate (UTR)

- intrinsic rates greater than the UTR may cause 2:1 block

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12
Q

period following a VS or VP in which the pacemaker cannot see/sense ventricular activity?

A

Ventricular Blanking period (VB)

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13
Q

programmable period following a ventricular event intended to prevent pacing the ventricles to quickly in response to fast atrial events (PAC, atrial arrhythmias, or retrograde P-waves) and occurrence of pacemaker mediated tachycardias (PMT)?

A

Post Ventricular Atrial Refractory Period (PVARP)

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14
Q

in dual chamber pacing, the period of time elapsing between a ventricular event and the next scheduled atrial pace?

A

Ventricular-Atrial interval (VA)

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15
Q

Which timing intervals are seen on the atrial channel?

A
  • AB
  • AV delay (SAV/PAV)
  • PVAB
  • PVARP
  • TARP
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16
Q

interval following an atrial pace during which an atrial event is not seen by the ventricular channel of the pacemaker, prevents crosstalk or inhibition of a need VP?

A

Post Atrial Ventricular Blanking interval (PAVB)

17
Q

What is the PAVB?

A
  • Post AV Blanking interval
  • the interval after an atrial pacing stimulus during which the ventricular event is not seen by the atrial channel of the pacemaker
18
Q

period where an atrial event will be sensed but does not affet the pacemaker timing cycle?

A

Atrial Refractory Period

19
Q

What is the purpose of the ventricular safety period (VSP)?

A
  • to prevent pacing inhibition d/t cross-talk

- prevents pacing on t-wave

20
Q

Why is the Paced AV (PAV) interval longer (appx 30ms) than the Sensed AV (SAV) interval?

A
  • the PAV interval is longer then the SAV to account for the slower cell to cell propagation pathway
  • pacing site may no be near the conduction p-way so time is needed to allow signal to reach the p-way
21
Q

How long is the ventricular safety period (VSP)?

A

110 ms interval that starts after atrial paced event

22
Q

What is the purpose of the Atrial Blanking period?

A

to prevent sensing AP output or AS depolarization

23
Q

What is the purpose of the Post Ventricular Atrial Blanking period (PVAB)?

A
  • prevents crosstalk or sensing of the ventricular signal (VS or VP) on the atrial channel
24
Q

Which timing intervals are seen on the ventricular channel?

A
  • Post Ventricular Atrial Blanking (PVAB)
  • Ventricular Safety Period (VSP)
  • Ventricular Blanking (VB)
  • Ventricular Refractory Period (VRP)
25
Q

Which 2 timing intervals prevent crosstalk?

A
  • PVAB

- PAVB

26
Q

What is the purpose of the Ventricular Refractory Period?

A
  • prevents double counting of wide R-waves and T-wave sensing

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