1|Page
NBRC SDS EXAM NEWEST 2026/ 2027 | COMPLETE
EXAM QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) ALREADY GRADED A+| NBRC SDS
FINAL EXAM REVIEW
This rhythm creates a series of identical p waves that take on a
sawtooth appearance. ......ANSWER......Atrial flutter
This rhythm occurs when multiple ectopic foci are firing almost
continuously and produces an irregular baseline with no visible p waves
and irregular QRS complexes ......ANSWER......Atrial fibrillation
Cardiac infarction is diagnosed by ......ANSWER......significant q waves
Which heart block is identified by prolonged P-R interval?
......ANSWER......1st degree AV block
Which heart block is characterized by increasingly longer PR intervals
until a missing QRS ......ANSWER......2nd degree AV block Mobitz 1
(Wenchebach)
longer, longer, longer, drop, then you got a wenchebach
Which heart block is characterized by missing QRS ......ANSWER......2nd
degree AV block Mobitz II
If some P's don't get through, you have a mobitz type 2
pg. 1
,2|Page
Which Heart block is characterized by an atrial rate greater than 60, and
a ventricular rate less than 40? The PR interval cannot be determined
and the QRS is widened ......ANSWER......3rd degree AV block
If P's & Q's dont agree, then you have a 3rd degree
What is the most common cup electrode? ......ANSWER......Gold plated
silver electrodes
(they require less maintanence than silver-sliver chloride electrodes)
What is the most accurate method to measure intrathoracic breathing
effort ......ANSWER......esophageal pressure
Frequency is measured in _______, and is a unit of 1 cycle per second
......ANSWER......hertz
The height of the waveform (measured in mV or uV)
......ANSWER......amplitude
Increases or decreases the signal size of the amplifier signal
......ANSWER......Gain
Determines the amplitude of the pen deflection
......ANSWER......sensitivity
pg. 2
,3|Page
a low sensitivity setting produces a ____ deflection
......ANSWER......Large
The higher the sensitivity the ________ the deflection
......ANSWER......smaller
If not correctly grounded, the patient may receive what
......ANSWER......Current (shock)
An unwanted current in a circuit that connects 2 points
......ANSWER......ground loop
How can a ground loop be avoided ......ANSWER......connect all
equipment to a common ground point
What are 4 sources of leakage current ......ANSWER......earth
enclosure
patient
patient auxillary (gradual loss from charged capacitor)
What is a lethal macro shock ......ANSWER......>100-300mA
usually causes v fib
pg. 3
, 4|Page
The lower the skin resistance (wet skin) the __________________ the
shock ......ANSWER......Greater
Which patients are at the greatest risk for a micro shock?
......ANSWER......those with indwelling catheters or pacemakers
State Ohm's law ......ANSWER......V=current x resistance
current is labeled "i"
How much voltage is required to move a current measuring 5.6
amperes through a simple circuit containing a resistance of 3.85 ohms?
......ANSWER......V=current x resistance
5.6x3.85=21.560 volts
Process of rejecting or removing any similar information between G1
and G2 ......ANSWER......Common mode rejection (CMRR)
What type of therapy is used to treat delayed sleep phase syndrome
......ANSWER......light therapy
What is the minimum lux needed for light therapy to be effective
......ANSWER......2500 lux (most patients use 10,000 lux)
pg. 4
NBRC SDS EXAM NEWEST 2026/ 2027 | COMPLETE
EXAM QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) ALREADY GRADED A+| NBRC SDS
FINAL EXAM REVIEW
This rhythm creates a series of identical p waves that take on a
sawtooth appearance. ......ANSWER......Atrial flutter
This rhythm occurs when multiple ectopic foci are firing almost
continuously and produces an irregular baseline with no visible p waves
and irregular QRS complexes ......ANSWER......Atrial fibrillation
Cardiac infarction is diagnosed by ......ANSWER......significant q waves
Which heart block is identified by prolonged P-R interval?
......ANSWER......1st degree AV block
Which heart block is characterized by increasingly longer PR intervals
until a missing QRS ......ANSWER......2nd degree AV block Mobitz 1
(Wenchebach)
longer, longer, longer, drop, then you got a wenchebach
Which heart block is characterized by missing QRS ......ANSWER......2nd
degree AV block Mobitz II
If some P's don't get through, you have a mobitz type 2
pg. 1
,2|Page
Which Heart block is characterized by an atrial rate greater than 60, and
a ventricular rate less than 40? The PR interval cannot be determined
and the QRS is widened ......ANSWER......3rd degree AV block
If P's & Q's dont agree, then you have a 3rd degree
What is the most common cup electrode? ......ANSWER......Gold plated
silver electrodes
(they require less maintanence than silver-sliver chloride electrodes)
What is the most accurate method to measure intrathoracic breathing
effort ......ANSWER......esophageal pressure
Frequency is measured in _______, and is a unit of 1 cycle per second
......ANSWER......hertz
The height of the waveform (measured in mV or uV)
......ANSWER......amplitude
Increases or decreases the signal size of the amplifier signal
......ANSWER......Gain
Determines the amplitude of the pen deflection
......ANSWER......sensitivity
pg. 2
,3|Page
a low sensitivity setting produces a ____ deflection
......ANSWER......Large
The higher the sensitivity the ________ the deflection
......ANSWER......smaller
If not correctly grounded, the patient may receive what
......ANSWER......Current (shock)
An unwanted current in a circuit that connects 2 points
......ANSWER......ground loop
How can a ground loop be avoided ......ANSWER......connect all
equipment to a common ground point
What are 4 sources of leakage current ......ANSWER......earth
enclosure
patient
patient auxillary (gradual loss from charged capacitor)
What is a lethal macro shock ......ANSWER......>100-300mA
usually causes v fib
pg. 3
, 4|Page
The lower the skin resistance (wet skin) the __________________ the
shock ......ANSWER......Greater
Which patients are at the greatest risk for a micro shock?
......ANSWER......those with indwelling catheters or pacemakers
State Ohm's law ......ANSWER......V=current x resistance
current is labeled "i"
How much voltage is required to move a current measuring 5.6
amperes through a simple circuit containing a resistance of 3.85 ohms?
......ANSWER......V=current x resistance
5.6x3.85=21.560 volts
Process of rejecting or removing any similar information between G1
and G2 ......ANSWER......Common mode rejection (CMRR)
What type of therapy is used to treat delayed sleep phase syndrome
......ANSWER......light therapy
What is the minimum lux needed for light therapy to be effective
......ANSWER......2500 lux (most patients use 10,000 lux)
pg. 4
