WorksheetsUnit I Medical Electronics
Total questions: 36
Worksheet time: 18mins
Source of Bioelectric potential is ____________ in nature.
electronic
electric
ionic
mechanical
Phonocardiography is listening to __________
arm muscle sound
lungs sound
heart sound
respiratory tract sound
Which is the final stage in arrhythmia analysis?
Beat labeling
Alarms
Rhythm labeling
Summary statistics
Which rhythm is the principal component of the EEG that indicates the alertness of the brain?
theta rhythm
gamma rhythm
beta rhythm
alpha rhythm
How many steps are there in QRS detection?
Three steps
Two steps
Four steps
One step
_____________ is used to display ECG which enable direct observation of the ECG waveform.
Amplifier
Transducer
Tape Recorder
Cathode ray tube
An ECG is performed and reveals a progressively increasing PR interval and dropping of QRS complexes at regular intervals. Which of the following is the most likely diagnosis?
First-degree heart block
Second-degree heart block (Mobitz type 1)
Second-degree heart block (Mobitz type 2)
Hyperkalaemia
What view of the heart do leads V1 and V2 represent?
Inferior
Anterior
Lateral
Septal
Which of the following instrument is used to measure the oxygen saturation level of blood in localized areas of oxygen?
Ear Oximeter
Pulse Oximeter
Skin reflectance Oximeter
Intravascular Oximeter
Normal EEG frequency range is _______
50-500Hz
0.5-50HZ
0.05-5Hz
1-200Hz
What is the sampling rate of the analog-to-digital converter in digitizing of ECG signal in signal conditioning?
250 Hz
215 Hz
40-100 Hz
200-215 Hz
Ventricular Fibrillation is detected by _________
Shape of the QRS complexes
Difference of the R-R interval
Timing sequence of QRS complexes
Frequency domain analysis
Which of the following is considered to be the primary pacemaker of the heart?
sino-atrial node
atrio-ventricular node
purkinje fibres
bundle of his
A patient is noted to have an abnormally shortened PR-interval on their ECG. Which of the following is the most likely cause?
Left bundle branch block
Atrioventricular nodal fibrosis
Right bundle branch block
Wolff-Parkinson-White (WPW) syndrome
What is the duration of a normal PR-interval?
0.12 - 0.2 seconds (3-5 small squares)
0.04 - 0.12 seconds (1-3 small squares)
0.04 - 0.08 seconds (1-2 small squares)
0.08 - 0.12 seconds (2-3 small squares)
What is the normal duration of a QRS complex?
0.16 seconds (4 small squares)
0.08 seconds (2 small squares)
0.12 seconds (3 small squares)
0.04 seconds (1 small square)
Which of them is a neurological disorder which is expressed muscularly?
Paralysis
Muscular Dystrophy
Dementia
Alzheimer’s
The typical range of EMG can be _______
0 – 1 mV
1 – 5mV
0 – 0.1 mV
0.1 – 0.5 mV
Atrio ventricular node is located at __________
upper part of the heart wall between the two atrial
lower part of the heart wall above the two atrial
lower part of the heart wall between the two atrial
upper part of the heart wall above the two atrial
In arrhythmia monitoring system, it gives alarm light signals whenever the prematured or widened ectopic beats exist up to the rate of ___________
6/min to 10/min
6/min to 12/min
6/min or 10/min
6/min or 12/min
____________ measure potential from skin surface, heart, brain, and nerves
Surface Electrode
Micro Electrode
Depth Electrode
All the above
____________ measure bioelectric potential near or within a single cell
Surface Electrode
Micro Electrode
Depth Electrode
All the above
____________ penetrate the skin to measure EEG potentials
Surface Electrode
Micro Electrode
Depth Electrode
All the above
_____ is used frequently for ECG measurements
Multipoint Electrode
Floating surface Electrode
Chemical Electrode
All the above
_____ is used to measure oxygen CO2, and PO2 in blood
Multipoint Electrode
Floating surface Electrode
Chemical Electrode
All the above
Which among the following is not associated with electrical activity of heart
SA Node
Bundle of His
Bipolar Leads
AV Node
ECG Stands for (a)
T wave occurs during
ventricular repolarisation
atrial depolarisation
ventricular depolarisation
atrial repolarisation
Number of electrodes/leads normally used in ECG measurement
(a)
In bipolar configuration which among the following lead is used as ground
right leg
right wrist
chest centre
head
10/20 system of electrode placement is used in
EEG
ECG
EMG
ENG
In 10/20 system, among the letters F,T,C,P and O, the letter T stands for
(a)
(a) is used to record the electrical activity of brain
EEG Measures (a) waves
EEG Measures (a) waves
Which among the following is not associated with muscle contraction
action potential
resting potential
threshold potential
electro potential
