Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

ATI Prep Course > Basic Science > Flashcards

Basic Science Flashcards

1
Q

Component of pulse generator that stores electrical charge

A

Capacitor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Component of pulse generator- switch activated by a magnet causing asynchronous pacing, now a solid state magnet detector

A

Reed switch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Component of pulse generator that restricts current flow to one direction

A

Diode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Component of pulse generator that restricts current flow

A

Resistor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Component of pulse generator that converts a biphasic signal to all positive or all negative

A

Rectifier

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Component of pulse generator- semiconductor used for switching and amplification

A

Transistor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

1 Hz = ___ bpm

A

60

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Standard for ICD battery composition

A

Li/ SVO

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Li/SVO has a ___ ____ discharge curve making it more predictable

A

Two stage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The battery chemistry of Li/I2 is ___V

A

2.8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The battery chemistry of Li/SVO is ___V

A

3.2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

_____ = current x voltage

A

Power
P= I x V

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Sensor- only takes in positive feedback

A

Open loop
Accelerometer, piezoelectric crystal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Ohm’s Law

A

V = IR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Energy Formula

A

E = V x I x PW

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Force moving the current: electromotive push

A

Voltage (V)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Flow of electrons through a circuit (mA)

A

Current (I)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Opposition to current flow (ohm)

A

Resistance (R)/ impedance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Condition that has been shown to cause an increase in stimulation threshold, a wide QRS, latency, or undersensing

A

Hyperkalemia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Normal potassium values

A

3.5-5.0 mEq/liter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Normal calcium values

A

9.0-11.0 mg/dl
4.5-5.3 mEq/liter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Normal magnesium values

A

1.8-3.0 mg/dl
1.5-2.5 mEq/liter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Most common electrolyte abnormality to cause loss of capture in the A or V

A

Hyperkalemia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Battery service life formula

A

Time = Q (battery capacity in Ah) / I (current drain in amperes)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
The deliverable portion of battery capacity
Beginning of Life (BOL) Considered BOL until it reaches ERI
26
Point in the pacemakers service life at which the manufacturer recommends replacement
ERI Elective replacement indicator
27
Clinical trial term- compares subjects with the treatment regimen they received
As treated analysis
28
Clinical trial term- analyzed in the groups they were randomized to regardless of whether they received or adhered to the intervention
Intention to treat
29
Clinical trial terms- restricts comparison to those patients who adhered to the clinical trial instructions stipulated in the protocol
Per protocol or "on treatment" analysis
30
Sensor- the physiologic change is converted to a rate and the resultant rate change induces a change of the physiologic parameter in the other direction
Closed loop Ex: O2 sat and myocardial contractility
31
Sensors- detects changes that determine the normal sinus response to physiologic needs
Primary Ex: SV, myocardial contractility, O2 sat
32
Sensor- detects internal changes that result from exercise
Secondary Ex: QT, MV, pH
33
Sensor- detect changes as a result of exercise (older)
Tertiary Ex: piezoelectric crystal, accelerometer
34
The maximal rate of change of the electrical potential between the sensing electrode and is the first derivative of the electrogram (dV/dt)
Slew Rate
35
Normal slew rate
> 0.5V/s in both A and V
36
Number of times a signal fluctuates in 1 second Expressed in hertz or cycles per second
Frequency
37
Max frequencies for A and V
A 80-100 Hz V 10-30 Hz
38
The excess positive charge that surrounds the cathode following a stimulus
Polarization
39
Unit of electrical capacitance
Farad F
40
Unit of energy or work
Joule J
41
Unit of inductance (induced by a magnetic field
Henry
42
Pacemaker component
Zener Diode
43
44
The lowest stimulus voltage that will stimulate the myocardium at any pulse duration
Rheobase
45
The pulse duration at a stimulus amplitude that is twice the rheobase voltage Approximates the point of minimum threshold on the strength duration curve
Chronaxie
46
SDC
47
Prognostic marker of HF and mortality Assesses autonomic modulation of the sinus node Decreases in HF patients as a result of down regulation of beta receptors
Heart rate variability
48
Research study term If you were to repeat the same clinical trial a hundred times you can be sure that 95% percent of the time the r results would fall within the calculated range
Confidence interval (CI)
49
Research term The probability that any particular outcome would have arisen by chance. The smaller the ___ the less likely the data was by chance and more likely due to the intervention
P value
50
Considered a statistically significant P value
Less than 1/20 or P= 0.05
51
Research term The proportional reduction in risk between the rates of events in the control group and the experimental group
Relative Risk Reduction
52
Research term The arithmetic difference between the rates of events in the experimental group and the control group The decrease in a bad event due to the intervention
Absolute Risk Reduction (ARR)
53
Research term Refers to the increase of a good event as the result of the intervention
Absolute Benefit Increase (ABI)
54
Research term The number of patients that a physician would have to treat with the experimental treatment to achieve one additional patient with a favorable outcome
Numbers Needed to Treat (NNT)
55
56
Stimulation of these increases HR, force or contraction and cardiac output
Beta receptors
57
SV/EDV
EF
58
CMOS Damage to this chip requires device replacement
Complimentary metal oxide semiconductor
59
Battery term The quantity of electric current a battery can deliver
Battery capacity Given in ampere hours
60
Battery term In pacing the amount of current at the electrode surface delivered ti excitable tissue
Current density
61
Battery term The amount of current drawn from a battery by an external load
Current drain
62
The strength above which VF is no longer inducible In sinus rhythm- low energy shocks delivered during the t wave induce VF Higher energy shocks with energy above the ___ do not
Upper limit of vulnerability
63
Shocks need only eliminate fibrillatory wavelets in a critical amount of myocardium to extinguish the arrhythmia
Critical Mass theory

ATI Prep Course (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions