Device Refresher

Question 1

What are BOL and ERI magnet rates in MDT pacemakers?

Answer 1

85/65

Question 2

What does the TS marker indicate?

Answer 2

Sensed beat in VT detection zone

Question 3

What does the TF marker indicate?

Answer 3

Sensed beat in the FVT zone

Question 4

What does the FS marker indicate?

Answer 4

Sensed beat in the VF zone

Question 5

What study determine the efficacy of ATP for fast VT’s?

Answer 5

The PainFREE Rx and Rx II trials found that ATP successfully terminated 3 out of 4 fast VT’s painlessly.

Question 6

What is current?

Answer 6

The flow of electrons in a completed circuit. (I)

Question 7

What is voltage?

Answer 7

The push in an electrical system.

Question 8

What unit is used to measure current?

Answer 8

Amperes or milliamperes, mA

Question 9

What is an ampere?

Answer 9

One ampere is a unit of electrical current that is produced by one volt acting through a resistance of 1 ohm.

Question 10

Formula for Ohm’s law.

Answer 10

V=IR

Question 11

If you reduce cut voltage in half, what happens to current?

Answer 11

Current is cut in half

Question 12

If impedance increases, current…

Answer 12

Decreases

Question 13

If you reduce impedance by half, current…

Answer 13

Doubles

Question 14

Slew Rate

Answer 14

Answer

Question 15

What safety margin should be programmed based on a pulse width threshold?

Answer 15

3x

Question 16

What is rheobase?

Answer 16

The lowest voltage on a stimulation curve which still results in capture at an infinitely long pulse width.

Question 17

What is chronaxie?

Answer 17

Pulse duration at twice rheobase value.