ECG Quizzes
e
All of the following can be seen in a Normal Sinus Rhythm EXCEPT: a. A heart rate between 60 and 100 beats per minute. b. One-to-one association between P-waves and QRS complexes. c. A PR interval between 120 and 200 milliseconds. d. Upright P-waves in Leads I and aVF e. An inverted p-wave in Lead II
d
Choose the correct diagnosis from the choices below. a. Non-sustained polymorphic VT b. Atrial Fibrillation with a non-specific IVCD c. Accelerated Idioventricular Rhythm d. Non-sustained monomorphic VT e. Atrial tachycardia with rate-related (functional) aberrancy
b
Examine the rhythm strip below and select the best answer from the choices below. a. Atrial Tachycardia with Aberrant Conduction b. Sinus Bradycardia with Accelerated Idioventricular Rhythm (AIVR) c. Paroxysmal Atrial Fibrillation with Aberrant Conduction d. Intermittent Wolff-Parkinson-White e. Pacemaker Malfunction
d
Examine the rhythm strip below and select the correct diagnosis from the choices given. a. Sinus Bradycardia with Type 2 Second Degree AV Block b. Sinus Bradycardia with Type 1 Second Degree AV Block c. Sinus Bradycardia with High Grade AV Block d. Sinus Bradycardia, First Degree AV Block, and a Blocked PAC e. Sinus Bradycardia, First Degree AV Block and Marked Sinus Arrhythmia
b
Examine the rhythm strip below. Select the correct description of the pacemaker function. a. Ventricular Oversensing b. Normally functioning ventricular pacemaker c. Ventricular Undersensing d. Loss of Atrial Capture e. Loss of Ventricular Capture
d
Examine the strip below and select the answer that describes the proper diagnosis. a. Severe Sinus Bradycardia b. High Grade AV Block c. Type 2 Second Degree AV Block d. Third Degree (Complete) Heart Block e. Accelerated Junctional Rhythm
b
Examine the strip below. Select the answer that best describes the arrhythmia. a. Artifact- noise coming from a loose ECG electrode b. Torsades de Pointes c. Monomorphic Non-sustained Ventricular Tachycardia d. Ventricular Fibrillation e. Atrial fibrillation with Aberrant Conduction
1. c 2. a 3. d
Match the ECG Lead with the proper limb combination that makes up that lead. 1. Lead I 2. Lead II 3. Lead III a. Right Arm to Left Leg b. Left Arm to Right Leg c. Right Arm to Left Arm d. Left Arm to Left Leg e. Right Arm to Right Leg
1. b 2. a 3. e 4. c
Match the limb to the proper color using the standard configuration used in the USA. 1. Left leg 2. Left arm 3. Right leg 4. Right arm a. Black b. Red c. White d. Brown e. Green
c
Please identify the rhythm disturbance shown below: a. Sinoatrial Exit Block b. Sinus Tachycardia c. Sinus Bradycardia d. Sinus Arrest e. Normal Sinus Rhythm
b
Please identify the rhythm in the ECG below. a. Supraventricular Tachycardia b. Multifocal Atrial Tachycardia c. Atrial Tachycardia with 2:1 conduction d. Normal Sinus Rhythm e. Sinus Tachycardia
1. a 2. c 3. b 4. d
Please match the anatomical structure with it's function. 1. Returns oxygenated blood from the lungs to the heart. 2. Separates the left ventricle from the right ventricle. 3. Separates the left atrium from the left ventricle. 4. The main artery of the body. a. Pulmonary veins b. Mitral valve c. Septum d. Aorta e. Pulmonary artery
c
Select the best diagosis for the ECG below: a. Multifocal Atrial Tachycardia b. Ventricular Tachycardia c. Atrial Tachycardia with Aberrancy d. Junctional Tachycardia
e
Select the correct diagnosis to describe the rhythm below. a. Non-conducted Atrial Trigeminy. b. Sinus Rhythm with marked Sinus Arrhythmia. c. Type II Second Degree AV Block. d. 4:3 Wenckebach. e. Type I Second Degree AV Block.
b
Select the correct type of ectopic beat marked with the blue asterisk. a. Premature atrial contraction b. Ventricular Premature Beat c. Non-conducted Atrial Premature Beat d. Atrial Premature Beat with Aberrant Conduction e. Junctional Premature Beat
c
The AV Nodal delay is responsible for which part of the ECG signal: a. T wave b. P Wave c. PR Segment d. QRS Complex e. ST Segment
c
The most likely cause of the widened QRS complexes (marked with a "V") is: a. Sinus tachycardia with a run of non-sustained ventricular tachycardia. b. Atrial tachycardia with Wenckebach Block c. Atrial fibrillation with functional aberrancy (Ashmann's phenomenon). d. Atrial fibrillation with artifact
e
V3 should be located: a. above the left nipple. b. over the xyphoid process c. directly below V2 d. at the left parasternal border. e. midway between V2 and V4.
a
What component "opens" and "closes" a simple electrical circuit.... a. A switch. b. A wire c. A resistance d. A transistor. e. A voltmeter.
c
What do we call the period of time during which a cardiac cell or tissue (like a bundle branch) cannot "fire" because it has not yet recovered from the last beat? a. Period Occupado b. Recovery Period c. Refractory Period d. Busy Period
b
Which is the correct diagnosis for the strip below: a. Atrial Tachycardia with Aberrant Conduction b. Accelerated Idioventricular Rhythm c. Rate-related bundle branch block d. Artifact e. Torsades de pointes
c
Choose the best diagnosis for the strip below. a. Artifact b. Pre-excitation (WPW Syndrome) c. Ventricular fibrillation d. Torsades de Pointes e. Atrial fibrillation with aberrant conduction
d
A charged atom or molecule is known by what name? a. Neutron b. Protein c. Insulator d. Ion e. Electromagnetic radiation
c
The function of an ECG machine is most similar to a _____. a. insulator b. conductor c. voltmeter d. battery e. switch
c
What is the approximate heart rate in the tracing below: a. 60 bpm b. 85 bpm c. 100 bpm d. 120 bpm e. 75 bpm
a
Where in the heart is the AV Node located? a. In the atrial septum just above the tricuspid valve b. Near the right atrial appendage c. In the right ventricle d. In the left ventricle
a
Which ion current is responsible for depolarization of the cardiac cell? a. Sodium rapidly rushes into the cell b. Calcium is pumped out of the cell c. Sodium slowly moves out of the cell d. Potassium rushes into the cell e. Potassium rushes out of the cell
e
A "Functional" Bundle Branch Block means which of the following: a. The bundle branch is blocked all of the time. b. The bundle branch block is related to the presence of poor left ventricular function. c. The aberrancy is due to AV node dysfunction. d. The QRS duration is less than 120 msec. e. The bundle branch is only blocked under certain conditions, such as during a rapid heart rate or with premature beats.
d
A patient is connected to a cardiac monitor and Lead aVL is selected. The monitor is picking up a very small signal, as shown at the top. The lead being monitored is changed to Lead II as shown at the bottom. What is the most likely reason for the increased size of the QRS complexes? a. One of the electrodes has come loose. b. The ECG vector is traveling perpendicular to Lead II. c. The monitor unit is faulty. Call Biomed. d. The ECG vector is traveling perpendicular to aVL.
d
A vector is a scientific term used to define a force (in this case an electrical signal) having both amplitude and... a. velocity. b. magnitude c. mass. d. direction.
a
An ECG shows a heart rate of 75 beats per minute and a QT interval of 320 msec. Using Bazett's formula, the calculated QTc would be: a. 358 msec b. 320 msec c. 342 msec d. 304 msec e. 380 msec
c
COMPLEX STRIP ALERT!! Examine the rhythm strip below from a patient with a DUAL-CHAMBER Pacemaker. There is atrial-synchronous Ventricular Pacing present on the left and on the right. What do you think happened on the beats when the QRS complex changed (beats # 4 through 7)? a. Loss of Ventricular Capture. b. Accelerated Idioventricular Rhythm c. Intermittent Loss of Atrial Sensing d. Artifact
115
Calculate the heart rate in the strip below and enter it as a whole number (e.g. 50).
e
Carefully examine the strip below. Use all of the knowledge that you have learned thus far and choose the correct diagnosis. a. Non-sustained monomorphic VT b. Atrial flutter with 2:1 conduction c. Atrial Fibrillation with Rapid Ventricular Response d. Accelerated Idioventricular Rhythm e. Atrial Tachycardia with aberrant conduction
d
Examine the ECG below and choose the best correct diagnosis. a. Sinus Rhythm with Third Degree AV Block. b. Sinus Rhythm with Type II Second Degree AV Block. c. Sinus Bradycardia with First Degree AV Block. d. Sinus Rhythm with High Grade (2:1) Second Degree AV Block. e. Sinus Rhythm with Type I Second Degree AV Block
b
Examine the ECG below and identify the correct diagnosis. a. Non-conducted Atrial Trigeminy. b. Type II Second Degree AV Block. c. Sinus Rhythm with 3:2 Wenckebach. d. Type I Second Degree AV Block. e. Complete Heart Block
c
Examine the ECG below and identify the correct rhythm diagnosis. a. Sinus Rhythm with High Grade Second Degree AV Block. b. Sinus Rhythm with Type I Second Degree AV Block. c. Sinus Rhythm with Third Degree AV Block. d. Sinus Rhythm with Type II Second Degree AV Block. e. Accelerated Junctional Rhythm with AV Dissociation.
e
Examine the ECG below and select the best description for the arrhythmia shown. a. Sinus Tachycardia with Atrial Premature Beats b. Multifocal Atrial Tachycardia c. Ectopic Atrial Tachycardia d. Atrial Tachycardia with variable conduction e. Atrial Flutter with 2:1 conduction
b
Examine the ECG below and select the correct arrhythmia diagnosis. a. Atrial Trigeminy with aberrant conduction b. Ventricular Quadrigeminy c. Artifact d. Pacemaker Malfunction e. Ventricular Trigeminy
c
Examine the ECG below. Describe the pacemaker behavior exhibited on this rhythm strip. a. Dual-chamber pacemaker that is A-V Pacing b. Normally functioning ventricular pacemaker. c. Dual-chamber pacemaker that is Atrial Pacing d. Atrial-Synchronous Ventricular Pacing e. Inhibited
e
Examine the ECG below. Select the correct answer from the choices. a. Complete (Third Degree) AV Block b. Type 1 Second Degree AV Block c. Blocked PACs (premature atrial contractions). d. Sinus Bradycardia with Atrial Bigeminy e. Type 2 Second Degree AV Block
d
Examine the ECG below. Select the correct answer from the choices. a. Normally functioning single chamber pacemaker b. Loss of Ventricular Capture c. Atrial Undersensing d. Single Chamber Pacemaker with Ventricular Undersensing e. Normally functioning dual chamber pacemaker
a
Examine the continuous rhythm strip below. Select the correct diagnosis from the list. a. Sinus Arrest b. Type 1 Second Degree AV Block c. Type 2 Second Degree AV Block d. Artifact -- the ECG leads fell off the patient. e. Complete AV Block
d
Examine the entire rhythm strip below and select the correct diagnosis from the choices below. a. Paroxysmal Supraventricular Tachycardia (PSVT) b. Sinus Tachycardia with Type 1 Second Degree AV Block c. Non-sustained Ventricular Tachycardia d. Atrial Flutter with Variable AV Conduction e. Atrial Fibrillation with Rapid Ventricular Response
a
Examine the rhythm strip below and BASED ON WHAT YOU HAVE LEARNED SO FAR identify the correct answer below. Be CAREFUL!! a. Artifact b. Typical Atrial Flutter with 4:1 conduction c. Atypical Atrial Flutter d. Atrial Tachycardia with Block e. Sinus Tachycardia
c
Examine the rhythm strip below and provide the most likely rhythm diagnosis from the choices provided. a. Atrial Undersensing b. A-V Pacing - normal pacemaker function c. Atrial-Synchronous Ventricular Pacing - Normal pacer function. d. Single Chamber Ventricular Pacemaker - normal pacemaker function e. Atrial flutter with 2:1 conduction
e
Examine the rhythm strip below and select the most likely diagnosis from the choices given. a. Sinus Tachycardia b. Atrial Flutter with 2:1 Conduction c. Atrial Fibrillation with a Rapid Ventricular Response d. Ventricular Tachycardia e. Supraventricular Tachycardia
c
Examine the rhythm strip below. Choose the most correct answer for the diagnosis. a. Complete AV block with premature atrial contractions b. Artifact - the ECG lead fell off the patient. c. Post-tachycardia sinus pause in a patient with Tachy-Brady Syndrome d. Vagal reaction with dramatic sinus pause. e. Paroxysmal AV Block in a patient with permanent atrial fibrillation
a
Examine the rhythm strip below. Keeping in mind what you have learned SO FAR in the course, identify the cause for the irregular rhythm. a. NSR with Sinus Arrhythmia b. First Degree AV Block c. Type 1 Second Degree AV Block d. Complete AV Block e. Type 2 Second Degree AV Block
e
Examine the rhythm strip below. Select the correct ECG diagnosis. a. Complete (Third Degree) AV Block b. Frequent Blocked PACs (premature atrial contractions) c. Type 2 Second Degree AV Block d. NSR with 1st degree AV Block e. Type 1 Second Degree AV Block
e
Examine the strip below and select the correct diagnosis from the choices below. a. Accelerated Idioventricular Rhythm (AIVR) b. Supraventricular Tachycardia with Aberrant Conduction c. Atrial Fibrillation with Aberrant Conduction d. Intermittent Wolff-Parkinson-White Syndrome e. Non-sustained Ventricular Tachycardia
c
Examine the strip below. Select the correct diagnosis from the choices given. a. Type 2 Second Degree AV Block b. Atrial fibrillation with a moderate ventricular response c. Sinus Rhythm with PACs, some aberrantly conducted. d. Sinus Rhythm with Marked Sinus Arrhythmia and PVCs e. Sinus Rhythm with PACs and PVCs
c
Examine the strip below. Select the correct diagnosis from the choices provided. a. Intermittent ventricular pacing b. Torsades de Pointes c. NSR with bursts of Atrial Tachycardia with Aberrant Conduction d. NSR with Non-sustained Ventricular Tachycardia e. Artifact - someone is shaking the ECG wires
d
Examine the three-lead rhythm strip below. Select the BEST answer that describes the arrhythmia seen on the strip. a. Torsades de Pointes b. Artifact -- the patient had an itch c. Monomorphic Ventricular Tachycardia d. Polymorphic Non-sustained Ventricular Tachycardia e. Runs of Paroxysmal Atrial Fibrillation with Aberrant Conduction
c
Examine the tracing below. Identify the correct problem with this pacemaker. a. Normal Pacemaker Function b. Ventricular Oversensing c. Intermittent Loss of Ventricular Capture d. Loss of Atrial Capture e. Ventricular Undersensing
a
Identify the correct rhythm diagnosis for the ECG below. a. Atrial Flutter with variable AV conduction b. Sinus Tachycardia with Atrial Premature Beats c. Multifocal Atrial Tachycardia d. Atrial Flutter with 2:1 conduction e. Atrial Tachycardia with variable conduction
c
Identify the correct rhythm diagnosis for the ECG below. a. Atypical Atrial Flutter with variable AV conduction b. Atrial Flutter with 3:1 conduction c. Atrial Flutter with 4:1 conduction d. Multifocal Atrial Tachycardia e. Atrial Flutter with 2:1 conduction
b
Identify the nature of the "squiggle" below. Note that the two ECG leads are simultaneous. a. Atrial flutter b. Artifact c. Atrial fibrillation with Aberrancy d. Sequential PVCs e. Ventricular Tachycardia
b
Identify the rhythm in the following ECG: a. Marked Sinus Arrhythmia b. Sinus Tachycardia c. Normal Sinus Rhythm d. Ectopic Atrial Tachycardia e. Sinus Bradycardia
b
If an ECG machine is set to "standard" calibration (1mV/cm), what amplitude is one small box equal to? a. 1 mm = 0.01 mV b. 1 mm = 0.1 mV c. 1 mm = 1 mV d. 1 mm = 10 mV
c
In a bipolar electrical recording system, which of the following statements is TRUE: a. A switch is used to detect electrical differences. b. One recording electrode is used to detect electrical signals. c. Signals traveling perpendicular to the electrodes will record the smallest deflection. d. Signals traveling parallel to the electrodes will record the smallest deflection
e
In the precordial (chest wall) leads, as you go from V1 to V6 the R-wave generally starts out small in V1 and is very large in V6. The lead in which the R-wave of the QRS complex becomes larger than the S-wave is called... a. Erb's point. b. Eintoven's point. c. the equilateral point. d. the point of maximal impulse. e. the transition point.
a
Measure the PR interval and the QRS duration in the following tracing and select the correct values from the list below: a. PR = 160 ms; QRS = 80 ms b. PR = 160 ms; QRS = 120 ms c. PR = 200 ms; QRS = 80 ms d. PR = 200 ms; QRS = 120 ms e. PR = 120 ms; QRS = 120 ms
d
Please examine the ECG below. Measure the intervals, then choose the correct response. a. Rate = 65-70 bpm; PR = 120 ms; QRS = 120 ms; QT 400 ms b. Rate = 75 - 85 bpm; PR = 160 ms; QRS = 120 ms; QT 400 ms c. Rate = 65 - 75 bpm; PR = 120 ms; QRS = 120 ms; QT = 500 ms d. Rate = 65 - 72 bpm; PR = 160 ms; QRS = 80 ms; QT 400 ms e. Rate = 55-60 bpm; PR = 120 ms; QRS = 80 ms; QT 500 ms
c
Please examine the strip below and select the correct diagnosis for the arrhythmia that is present. a. Sinus rhythm, 1st degree AV Block, and a Premature Atrial Contraction with Aberrant Conduction b. Atrial Flutter with 2:1 conduction and intermittent aberrancy. c. Sinus Rhythm with 1st Degree AV Block and a PVC. d. Sinus Tachycardia with a Premature Ventricular Contraction e. Sinus Tachycardia with 1st Degree AV Block and a PAC.
c
Select the answer that best describes the rhythm strip below. a. Sustained Supraventricular Tachycardia b. Atrial Flutter with 2:1 conduction c. Atrial Fibrillation with a Rapid Ventricular Response d. Torsades de Pointes e. Sustained Polymorphic Ventricular Tachycardia
b
Select the best diagosis for the ECG below: a. Atrial Tachycardia with Block b. Atrial Tachycardia c. Atrial Tachycardia with Aberrancy d. Ventricular Tachycardia e. Multifocal Atrial Tachycardia
d
Select the best diagosis for the ECG below: a. Multifocal Atrial Tachycardia b. Sinus Arrhythmia c. Atrial Tachycardia with 3:1 Conduction d. Atrial Tachycardia with AV Block e. Supraventricular Tachycardia with 1:1 conduction
d
Select the best diagosis for the ECG below: a. Type 2 second degree AV Block b. Sinus Tachycardia c. Multifocal Atrial Tachycardia d. Supraventricular Tachycardia e. Atrial Tachycardia with 2:1 Block
c
Select the correct description for the rhythm below: a. Sinus Arrhythmia b. Normal Sinus Rhythm c. Sinus Tachycardia d. Sinus Bradycardia
a
Select the diagnosis that best fits the rhythm in the following ECG: a. Atrial fibrillation with a slow ventricular response. b. Atrial fibrillation with complete AV block c. Atrial flutter with variable block d. Severe Sinus Bradycardia e. Atrial tachycardia with variable block.
e
Select the proper rhythm diagnosis for the tracing below. a. Ectopic Atrial Rhythm b. Normal Sinus Rhythm c. Normal Sinus Rhythm with Sinus Arrhythmia d. Sinus Tachycardia e. Sinus Bradycardia with Sinus Arrhythmia
c
Sinus node dysfunction can present with any of the following findings EXCEPT: a. Sinoatrial Exit Block b. Chronotropic Incompetence c. Sinus Tachycardia d. Sinus Bradycardia e. Sinus Pauses
d
The V6 electrode should be located: a. Anterior axillary line in 5th intercostal space b. At the mid-axillary line in 3rd intercostal space c. Anterior axillary line in 6th intercostal space d. At the mid-axillary line in 5th intercostal space
b
The contractile proteins in the heart muscle cell or myocyte that cause the cell to shorten and allow the heart to beat can be seen under the microscope. They are called: a. Nucleus b. Striations c. Cytoplasm d. Ribosomes e. DNA
d
The presence of Sinus Arrhythmia generally occurs because of: a. generalized conduction system disease. b. fluctuations in the sympathetic nervous system. c. the presence of sinus node dysfunction. d. fluctuations in the parasympathetic (vagal) nervous system. e. artifactual changes in R to R intervals.
a
The ridge known as the "sternal angle" is connected to which rib? a. Second rib b. Third rib c. Fourth rib d. First rib
b
The time interval associated with one large box (5 small boxes) on standard ECG paper running at standard speed is equal to: a. 1 second b. 200 msec c. 40 msec d. 400 msec e. 1/20 second
d
The two strips shown below are CONTINUOUS. Examine the strips carefully. Select the best answer from the choices given. a. Torsades de pointes b. Atrial flutter with bundle branch block c. PAT with aberrancy d. Non-sustained Monomorphic VT e. Atrial fibrillation with aberrant conduction
c
The upgoing wave labeled with a red asterisk in the diagram below would be named: a. S b. Q c. R d. R' (R-prime) e. T
a
Under normal circumstances, atrial and ventricular activity mainly travel: a. down and toward the patient's left. b. mainly towards the anterior chest wall. c. in a circular pattern. d. toward the vector defined by aVL. e. down and toward the patient's right.
d
Using all of the knowledge you have learned so far, identify the correct diagnosis for this strip from the choices below: a. Atrial Fibrillation with a moderate ventricular response b. Atrial Flutter with 2:1 conduction c. Supraventricular Tachycardia d. Atrial Tachycardia with Block e. Sinus tachycardia with PACs
e
What caused the irregularity in the strip below? a. Non-conducted (blocked) Atrial Premature Contraction b. Ventricular Premature Contraction (PVC) c. Marked Sinus Arrhythmia d. Atrial Premature Beat with Aberrant Conduction e. Atrial Premature Contraction (PAC)
d
What diagnosis best describes the ECG shown below? Make sure that you carefully examine it's REGULARITY. a. Supraventricular tachycardia b. Atrial flutter with 2:1 conduction. c. Sinus tachycardia with frequent atrial premature beats. d. Atrial fibrillation with a rapid ventricular response.
e
What diagnosis best describes the premature beats seen below. a. Premature Ventricular Contraction b. Sinus Arrhythmia c. Non-conducted (blocked) Atrial Premature Contraction d. Artifact e. Premature Atrial Contraction (PAC) with Aberrant Conduction
c
What form of sinus node dysfunction causes an inability of the sinus node to increase appropriately with exercise? a. Nocturnal Sinus Bradycardia b. Resting Sinus Bradycardia c. Chronotropic Incompetance d. SA Exit Block e. Tachycardia-Bradycardia Syndrome
a
What ion current occurs during repolarization of a heart muscle cell? a. Potassium rushes out of the cell, restoring the resting membrane potential. b. The cell becomes positive on the inside. c. The cell begins to faintly glow. d. Sodium rushes out of the cell, restoring the resting membrane potential of 0mV.
e
What is responsible for the pause in the rhythm strip below: a. Sinus Pause b. Marked Sinus Arrhythmia c. Type 2 Second Degree AV Block d. SA Exit Block e. Non-conducted ("Blocked") PAC
c
What is the reason for the IVCD in the ECG below. a. The patient has slow ventricular tachycardia. b. The patient has a bundle branch block. c. The patient has a permanent pacemaker. d. The patient has WPW Syndrome.
a
What is the reason for the widened QRS complex in the tracing below: a. Left Bundle Branch Block b. Type II Second Degree AV Block c. Pre-excitation (WPW Syndrome) d. Rate Related IVCD e. Permanent Pacemaker
b
What would be the correct diagnosis for the rhythm strip below: a. Sinus Arrest b. Sinus Pause c. Sinus Bradycardia d. Artifact (the lead fell off) e. Post-Tachycardia Pause
a
Which of the following diagnoses best describes this arrhythmia. Note the irregularity! a. Atrial Fibrillation with Aberrant Conduction b. Supraventricular Tachycardia c. Atrial Tachycardia with Block d. Sinus tachycardia with marked sinus arrhythmia e. Atrial flutter with functional aberrancy (Ashmann's)
b
Which of the following diagnoses is most correct? a. Non-sustained monomorphic VT b. Torsades de pointes c. Atrial fibrillation with aberrant conduction d. Polymorphic non-sustained VT e. Artifact
e
Which of the following is NOT true in the diagnosis of 3rd Degree (Complete) AV Block? a. The P-R relationship varies b. 2:1 or 3:1 conduction is NOT present. c. The atrial rate is constant. d. The QRS complexes are regular. e. The ventricular rate is faster than the atrial rate.
a
Which of the following statements is FALSE: a. The concentration of potassium inside a heart muscle cell is much lower than the concentration of potassium outside the cell. b. Energy is required to maintain a high concentration of potassium inside the cell compared with outside the cell. c. The resting membrane potential of a cardiac muscle cell is about -90 millivolts. d. Intercalated disks allow the transmission of an action potential from one cell to another. e. The cell membrane contains proteins that control the flow of ions in and out of the cell.
b
Which of the following tissues depolarize primarily due to slow inward calcium currents. a. Ventricular Myocardium b. AV Node c. Bundle Branches / Purkinje System d. Atrial Myocardium e. Atrial myocardium
d
Which of the following would NOT result in widening of the QRS complex: a. A Right Bundle Branch Block. b. Right ventricular pacing. c. A Left Bundle Branch Block d. Conduction delay within the AV Node. e. Pre-excitation due to an accessory pathway (i.e. Wolff-Parkinson-White syndrome).
a
Which part of the atom is free to move through electrical conductors such as metals? a. Electrons. b. Protons c. Neutrons. d. Alpha particles. e. Positrons.
a
Which structure is NOT part of the cardiac conduction system? Select one: a. The Coronary Sinus b. The Bundle of His c. The AV Node d. The Purkinje System e. The Bundle Branches
a
Which sub-atomic particles found in an atom are positively charged? a. Protons b. Orbitals. c. Quarks. d. Neutrons. e. Electrons.
