Carley Moffatt
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Quiz on MDT: Week One Mock Test, created by Carley Moffatt on 21/09/2017.

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Carley Moffatt
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MDT: Week One Mock Test

Question 1 of 88

1

The AV node is made up of specialized cells located in

Select one of the following:

  • lower portion of the left atrium

  • upper portion of the right atrium

  • upper portion of the left atrium

  • lower portion of the right atrium

Explanation

Question 2 of 88

1

The delay of electrical impulses in the AV Node

Select one of the following:

  • allow the junction to contract

  • allow the atria to complete filling of ventricles before next contraction

  • makes the rate of discharge of SA node slower

  • forces electrical impulses to travel retroactively

  • makes pacemaker cells capable of discharging at a rhythmic rate of 40-60 bpm

Explanation

Question 3 of 88

1

The bundle of His

Select one of the following:

  • connects AV node with bundle branches

  • has pacemaker cells capable of discharging at rythmic rate of 30-50 bpm

  • activates atria in a backward (retrograde direction)

  • transmits impluses from the AV to the left atrium

  • A and C

Explanation

Question 4 of 88

1

AV Junction is comprised of

Select one of the following:

  • the AV node and branching portion of bundle of His

  • the AV node, branching, and nonbranching portion of bundle of His

  • the non branching portion of bundle of His

  • nonbranching portion, AV node, and purkinje fibers

  • the AV node, nonbranching portion, and His bundle

Explanation

Question 5 of 88

1

If the rate of discharge of SA node is slower than AV junction

Select one of the following:

  • the SA node has failed to discharge

  • the AV junction has failed to discharge

  • an impulse from the SA node has been conducted through the atria but not to the ventricles

  • the His junction has failed to generate an impulse

  • the AV junction must assume responsibility for conducting impulses to the atria

  • the AV node and nonbranching portion of the bundle of His may assume responsibility for pacing the heart

Explanation

Question 6 of 88

1

the AV junction may assume responsibility for pacing the heart if:

Select one of the following:

  • the AV node fails to discharge

  • the SA node fails to discharge

  • the rate of discharge of SA node is faster than AV junction

  • an impulse from the SA node is generated and conducted through the ventricles but not to the atria

  • the rate of discharge of SA node is slower than AV junction

  • an impulse from the SA node is generated and conducted through the atria but not to ventricles

  • B, E, and F

  • B, C and F

Explanation

Question 7 of 88

1

When the AV junction is pacing the heart

Select one of the following:

  • electrical implulse must travel in a forwards direction to activate ventricles

  • electrical impulse must travel in a backwards direction to activate ventricles

  • electrical impulse must travel in a backward direction to activate atria

  • electrical impulses must travel in a retrograde direction to activate ventricles

  • electrical impulses must travel in a retrograde direction to activate ventricles and atria

Explanation

Question 8 of 88

1

When an AV junction has assumed responsibility for pacing the heart, the P wave may appear

Select one of the following:

  • before QRS complex

  • after QRS complex

  • during QRS complex

  • before or during QRS complex

  • during or after QRS complex

  • before, during or after QRS complex

Explanation

Question 9 of 88

1

a QRS of <0.12 seconds

Select one of the following:

  • is usually indicative of a premature junctional complex

  • is always followed by a non-compensatory (incomplete pause)

  • is fast

Explanation

Question 10 of 88

1

We can recognize a PJC

Select one of the following:

  • because it arises from irritable site within the SA junction

  • it fires before its next expected sinus beat

  • QRS is usually <0.21 sec

  • often followed by a non-compensatory pause

  • A and B

  • B and D

  • A, B and D

Explanation

Question 11 of 88

1

The PJC replaces normal beats

Select one of the following:

  • True
  • False

Explanation

Question 12 of 88

1

The ability to recognize a PJC wave include all of the following symptoms except;

Select one of the following:

  • a P wave, QRS <0.12 sec, a non-compensatory (incomplete) pause, rate within normal ranges

  • a P wave may/may not be present, regular heart rhythm with premature beats

  • QRS <0.12 sec unless aberrantly conducted or an intraventricular conduction delay exists

  • P waves may occur before, during, or after QRS, rate usually within normal range, regular rhythm with premature beats

Explanation

Question 13 of 88

1

In a PJC, heart rates are usually...

Select one of the following:

  • within normal range, but depends on underlying rhythm

  • outside of normal range, but depends on underlying rhythm

  • within normal range, but depends on medical history

  • outside of normal range, but depends on whether or not the PJC arises from an irritable site

Explanation

Question 14 of 88

1

When trying to recognize a PJC, the rhythm should be

Select one of the following:

  • regular, but depends on the QRS

  • above average, with premature beats

  • regular, with premature beats

Explanation

Question 15 of 88

1

To recognize a PJC, we should look at...

Select one of the following:

  • rate, rhythm, QRS and PRI

  • rhythm, QRS, P waves and PRI

  • rate, QRS, PRI, rhythm and P waves

  • QRS, P waves, ectopic beats, underlying rhythm

  • rhythm, rates, PRI, QRS, and ectopic beats

Explanation

Question 16 of 88

1

In recognizing PJC's, P waves...

Select one of the following:

  • may occur before or afterQRS

  • may occur only before or during QRS

  • can occur before, during, or after QRS

Explanation

Question 17 of 88

1

In recognizing PJC's, if visible, P waves...

Select one of the following:

  • is inverted in leads I, II, III and aVF

  • is inverted in leads II, III and aVF

  • is inverted in leads !, !! and aVF

  • is inverted in leads I, III and aVF

Explanation

Question 18 of 88

1

If P wave occurs before QRS in a PJC,

Select one of the following:

  • PRI will usually be equal to or less than 0.12 seconds

  • PRI will usually be less than 0.12 seconds

  • PRI will usually be 0.12 seconds

  • PRI will usually be greater than 0.12 seconds

  • there is no PRI

Explanation

Question 19 of 88

1

If no P wave occurs before QRS in a PJC,

Select one of the following:

  • then there is no PRI

  • PRI will usually be equal to or greater than 0.12 seconds

  • PRI will be less than 0.12 seconds

  • PRI will be 0.12 seconds

  • PRI will be greater than 0.12 seconds

Explanation

Question 20 of 88

1

QRS in a PJC,

Select one of the following:

  • is usually equal to or less than 0.12 seconds unless aberrantly conducted or an intraventricular conduction delay exists

  • is usually equal to or less than 0.21 seconds unless aberrantly conducted

  • is usually equal to or less than 0.12 seconds unless a P wave occurs before the QRS

  • is usually equal to or less than 0.21 seconds intraventricular conduction delay exists

  • is usually equal to or less than 0.12 seconds unless aberrantly conducted or accompanied by a PRI of greater than 0.12 seconds

  • is usually equal to or less than 0.12 seconds unless an intraventricular conduction delay exists, or accompanied by a PRI of greater than 0.12 seconds

Explanation

Question 21 of 88

1

When recognizing a PJC, all except the following are true:

Select one of the following:

  • rate is usually within normal range, rhythm is regular with premature beats, and p waves may occur before, during, or after QRS

  • QRS is usually greater than 0.12 seconds unless aberrantly conducted, rate is usually within normal ranges, and rhythm is regular with premature beats

  • PRI will usually be equal to, or less than 0.12 seconds if P wave occurs before QRS, rhythm will be regular with premature beats, and QRS is usually equal to or greater then 0.12 seconds

  • rate is usually within normal ranges but depends on underlying rhythm, QRS is usually equal to or greater than 0.12 seconds unless aberrantly conducted, and there will be no PRI if P wave occurs before QRS

Explanation

Question 22 of 88

1

Causes for PJC include all of the following except;

Select one of the following:

  • congestive heart failure, digitalis toxicity, stimulants, and mental and physical fatigue

  • acute coronary syndromes, mental and physical fatigue, valvular heart disease, and electrolyte imbalance

  • caffeine, only physical fatigue, valvular heart disease, and acute coronary syndromes

  • rheumatic heart disease, tobacco and other stimulants, acute coronary syndromes, and digitalis toxicity

Explanation

Question 23 of 88

1

Most individuals with PJCs are asymptomatic

Select one of the following:

  • True
  • False

Explanation

Question 24 of 88

1

PJCs...

Select one of the following:

  • may lead to symptoms of palpitations or feeling of skipped beats

  • always require treatment

  • are caused by stimulants, and thus should be avoided

  • are caused only by physical fatigue

  • A and C

  • A, C and D

Explanation

Question 25 of 88

1

Which of the following are true about junctional rhythms

Select one of the following:

  • rate: 40-60
    rhythm: regular
    p waves: before and during QRS

  • rate: 30-50
    rhythm: regular
    p waves: before, after and during QRS

  • rate: 40-60
    rhythm: regular
    p waves: inverted if visible

  • rate: 40-60
    rhythm: regular
    p waves: before, and after QRS

  • rate: 40-70
    rhythm: regular
    p waves: before, after and during QRS; inverted if visible

Explanation

Question 26 of 88

1

when the rhythm is slower than expected, it is called

Select one of the following:

  • junctional bradycardia

  • deceletrated junctional rhythm

  • junctional tachycardia

Explanation

Question 27 of 88

1

what are the two types of rapid junctional rhythms

Select one of the following:

  • accelerated junctional rhythm and junctional tachycardia

  • junctional tachycardia and rapid junctional rhythm

  • rapid junctional rhythm and accelerated junctional rhythm

  • junctional tachycardia and junctional bradycardia

Explanation

Question 28 of 88

1

the two types of rapid junctional rhythms have bpms that range between

Select one of the following:

  • 60-100 and 100-140

  • 55-100 and 100-140

  • 60-100 and 100-130

  • 55-100 and 100-130

Explanation

Question 29 of 88

1

what is the difference between the two types of rapid junctional rhythms

Select one of the following:

  • rate

  • rhythm

  • p waves

Explanation

Question 30 of 88

1

all but the following are causes of accelerated junctional rhythm

Select one of the following:

  • acute myocardial infarction, CODP, rheumatic fever

  • hypokalemia, COPD, cardiac surgery and rheumatic fever

  • digitalis toxicity, acute myocardial infarction, caridac surgery and hypokalemia

  • acute myocardial infarction, digitalis toxicity and rheumatic fever

Explanation

Question 31 of 88

1

ventricles may assume responsibility for pacing the heart in all but which case;

Select one of the following:

  • SA node fails

  • SA node generates impulse but is blocked as it exists SA node

  • SA node discharge is faster than ventricles

  • irritable site in either ventricle produces early beat or rapid rhythm

Explanation

Question 32 of 88

1

ventricles may assume responsibility for pacing heart if the SA node discharge is slower than ventricles

Select one of the following:

  • True
  • False

Explanation

Question 33 of 88

1

Fill the blank space to complete the text.

when the SA node fails or its impulse is blocked as it exists the SA node, may assume responsibility

Explanation

Question 34 of 88

1

select all that apply. Ventricles may assume responsibility for pacing the heart if:

Select one or more of the following:

  • SA node fails

  • impulse from SA node generated but blocked as it exists SA node

  • SA node discharge slower than ventricles

  • irritable site in either ventricle produces early beat or rapid rhythm

Explanation

Question 35 of 88

1

we can recognize premature ventricular complexes by observing that the T wave is usually

Select one of the following:

  • in the opposite direction of QRS

  • parallel to QRS

  • in the same direction of QRS

  • non-existant

Explanation

Question 36 of 88

1

in premature ventricular complexes, all but which of the following are true

Select one of the following:

  • QRS typically greater than 0.12 seconds

  • occurs earlier than next expected sinus beat

  • T wave usually in opposite direction of QRS

  • arise from irritable focus in either ventricle

Explanation

Question 37 of 88

1

premature ventricular complexes arise from irritable focus in either ventricle

Select one of the following:

  • True
  • False

Explanation

Question 38 of 88

1

a PVC is usually followed by a

Select one of the following:

  • full compensatory pause

  • backward electrical impulse

  • a non-compensatory pause

Explanation

Question 39 of 88

1

2 sequential PVCs are called

Select one of the following:

  • runs or bursts

  • couplets

  • ventricular bigeminy

  • bigeminal PVCs

  • ventricular trigeminy

Explanation

Question 40 of 88

1

3 sequential PVCs are called

Select one of the following:

  • runs or bursts

  • ventricular trigeminy

  • trigeminal PVCs

  • bigeminal PVCs

Explanation

Question 41 of 88

1

Bigeminal PVCs are when ____________ occurs

Select one of the following:

  • more than 3 sequential PVCs

  • 2 sequential PVCs

  • every other beat is a PVC

  • every 3rd beat is a PVC

Explanation

Question 42 of 88

1

When every 3rd beat is a PVC, it is known as

Select one of the following:

  • runs or bursts

  • bigeminal PVCs

  • ventricular trigeminy

  • trigeminal PVCs

  • ventrucular quadrigeminy

  • C and D

  • A and C

Explanation

Question 43 of 88

1

Quadrigeminal PVCs are when

Select one of the following:

  • there are 4 sequential PVCs

  • every other beat is a PVC

  • every other beat is a PVC, for greater than 4 occasions

  • every 4th beat is a PVC

Explanation

Question 44 of 88

1

uniform PVCs are distinct in that they

Select one of the following:

  • have similar morphology in same lead, and originate from the same ectopic focus

  • have similar morphology in same lead, and originate from different ectopic focus'

  • have different morphology, and originate from the same ectopic focus

  • have different morphology, and originate from different ectopic focus'

Explanation

Question 45 of 88

1

when PVCs have different morphology in the same lead they are easily recognized as...

Select one of the following:

  • uniform PVCs

  • multiform PVCs

  • R-on-T PVCs

  • ventricular rhythms

Explanation

Question 46 of 88

1

multiform PVC's

Select one of the following:

  • often (but not always) arise from different foci

  • always arise from different foci

  • never arise from different foci

Explanation

Question 47 of 88

1

PVCs are named R-on-T PVCs, because the

Select one of the following:

  • R wave falls on the T wave of preceding beat

  • T wave falls on the R wave of preceding beat

  • R wave refracts on the T wave of preceding beat

  • T wave refracts on the R wave of preceding beat

Explanation

Question 48 of 88

1

2 PVCs in a row are called

Select one of the following:

  • paired PVCs

  • couplets

  • bursts

  • salvo

  • A and C

  • A and B

Explanation

Question 49 of 88

1

"salvo," "run," or "burst" of VT are all ways of describing

Select one of the following:

  • greater than 5 PVCs in a row at a rate greater than 100 bpm

  • greater than 3 PVCs in a row at a rate greater than 50 bpm

  • greater than 5 PVCs in a row at a rate greater than 50 bpm

  • greater than 3 PVCs in a row at a rate greater than 100 bpm

  • greater than 3 PVCs in a row at a rate greater than 120 bpm

Explanation

Question 50 of 88

1

The rate of a PVC is

Select one of the following:

  • usually normal, but depends on underlying rhythm

  • usually higher than normal, but depends on underlying rhythm

  • usually lower than normal, but depends on underlying rhythm

  • usually normal, but depends on past medical conditions

Explanation

Question 51 of 88

1

The rhythm of a PVC

Select one of the following:

  • depends on underlying rhythm

  • depends on past medical history

  • depends on the conditions the patient are currently in

  • depends on underlying rhythm, with premature beats

Explanation

Question 52 of 88

1

P waves in a PVC

Select one of the following:

  • are usually absent

  • with retrograde condiction to atria, may appear after QRS

  • may appear after QRS, usually upright in ST-segment or T wave

  • may occur before after or during QRS

  • if visible, P wave is inverted

  • A and B

  • B and C

  • A, B, and C

Explanation

Question 53 of 88

1

In PVCs, QRS is

Select one of the following:

  • greater than 0.12 seconds, narrow and bizarre

  • usually in the same direction as the T wave

  • greater than 0.12 seconds, wide and bizarre

  • usually in the opposite direction of P wave

Explanation

Question 54 of 88

1

All of the following are causes of Premature Ventricular complex, except

Select one of the following:

  • normal variant, exercise, stimulants, increased sympathetic tone and hypoxia

  • stress and anxiety, medications, congestive heart failure, and valvular heart disease

  • digitalis toxicity, stress, myocardial ischemia, acid-base imbalance, and increased sympathetic tone

  • caffiene, TCA's, acute coronary syndromes, exercise and normal variant

Explanation

Question 55 of 88

1

Patients of PVC may be asymptomatic

Select one of the following:

  • True
  • False

Explanation

Question 56 of 88

1

patients of PVC who are symptomatic may complain of all the following except;

Select one of the following:

  • palpitations, racing heart, lower back discomfort

  • racing heart, neck discomfort, skipped beats

  • chest discomfort

Explanation

Question 57 of 88

1

if PVCs are frequent,

Select one of the following:

  • decreased cardiac output possible

  • increased cardiac output possible

  • no cardiac output possible

Explanation

Question 58 of 88

1

treatment of PVCs is dependent on all except which of the following

Select one of the following:

  • cause

  • signs and symptoms

  • clinical situation

  • mental and physical fatigue

Explanation

Question 59 of 88

1

These look just like a PVC, but appear LATE instead of early.

Select one of the following:

  • ventricular escape beats

  • 'safety' mechanisms

  • AV junctions

  • compensatory pauses

Explanation

Question 60 of 88

1

three or more ventricular escape beats in row, with a rate of 20-40 bpm is indicative of

Select one of the following:

  • idiocentricular rhythm

  • agonal rhythm

  • ventricular escape beats

  • premature junctional complexes

Explanation

Question 61 of 88

1

agonal rhythm shows a ventricular rate of

Select one of the following:

  • less than 20 bmp

  • greater than 20 bmp

  • equal to 30 bpm

  • greater than 30 bpm

  • between 20 and 30 bpm

Explanation

Question 62 of 88

1

you are given the following information...
rate:20-bpm
rhythm: essentially regular
P waves: usually absent
PRI: none
What do you diagnose?

Select one of the following:

  • idioventricular rhythm

  • premature junctional complex

  • agonal rhythm

  • ventricular escape beats

  • premature ventricular complex

  • accelerated idioventricular rhythm

Explanation

Question 63 of 88

1

Select from the dropdown list to complete the text.

P waves in idioventricular rhythms are usually absent, or with retrograde conduction to atria, may appear ( after, before ) QRS (usually upright in ST-segment or T wave)

Explanation

Question 64 of 88

1

if no P wave occurs before QRS in _____________, then there is no PRI. In ____________, there is always no PRI.

Select one of the following:

  • PJCs, idioventricular rhythms

  • idioventricular rhythms, PJCs

  • rapid junctional rhythms, accelerated idioventricular rhythms

  • accelerated idioventricular rhythms, rapid junctional rhythms

Explanation

Question 65 of 88

1

in this rhythm, the T wave is frequently in the opposite direction of QRS complex

Select one of the following:

  • idioventricular rhythm

  • acceletated junctional rhythm

  • premature junctional complexes

  • premature ventricular complexes

Explanation

Question 66 of 88

1

introventricular rhythms may occur in all of the following cases, except for

Select one of the following:

  • SA node and AV junction quit

  • rate of discharge of SA node or AV junction intrinsic rate is slower than ventricular rate

  • digitalis toxicity

  • impulses generated by the supracentricular pacemaker site are firing too quickly

  • metabolic imbalances

Explanation

Question 67 of 88

1

slow rate and loss of atrial kick in idioventricular rhythms may result in upwards cardiac output

Select one of the following:

  • True
  • False

Explanation

Question 68 of 88

1

Scenario:
your patient has a QRS greater than 0.12 seconds, but an essentially regular rhythm. You notice three or more ventricular escape beats in a row, with a rate of 20-40 bpm. What should you do?

Select one of the following:

  • lidocaine

  • TCP or atropine

  • increase MVO2

  • predispose patient to ventricular dysrythmmias

Explanation

Question 69 of 88

1

three or more ventricular escape beats occur in a row, rate of 41-100 bpm. What do you diagnose?

Select one of the following:

  • accelerated idioventricular rhythm

  • idioventricular rhythm

  • premature ventricular complex

  • ventricular tachycardia

Explanation

Question 70 of 88

1

some physicians consider ventricular rate range of AVIR to be 41-100, while others consider it to be 41-120 bpm

Select one of the following:

  • True
  • False

Explanation

Question 71 of 88

1

P waves are usually absent in this rhythm, though with retrograde conduction to atria, may appear after QRS (usually upright in ST-segment or T wave)

Select one of the following:

  • accelerated idioventricular rhythm

  • idioventricular rhythm

  • premature ventricular complex

  • torsades de pointes

  • A and B

  • A and D

Explanation

Question 72 of 88

1

acelerated idioventricular rhythm appears in all of the following, with the exception of;

Select one of the following:

  • often seen during the first 12 hours of MI

  • post-reperfusion therapy (successful)

  • accelerated sinus rate

  • decelerated sinus rate

  • acute mypocarditis

Explanation

Question 73 of 88

1

accelerated idioventricular rhythm appears in all of the following, with the exception of;

Select one of the following:

  • digitalis toxicity

  • cocaine toxicity

  • subarachnoid hemorrhage

  • acute myocarditis

  • hypertensive heart disease

  • all of the above are causes of accelerated idioventricular rhythm

Explanation

Question 74 of 88

1

If a patient with accelerated idioventricular rhythms is symptomatic because of loss of atrial kick, treatment can include all of the following with the exception of;

Select one of the following:

  • atropine

  • atrial pacing

  • ventricular antiarrhythmics

Explanation

Question 75 of 88

1

treatment is usually unnecessary in patients with accelerated idioventricular rhythms

Select one of the following:

  • True
  • False

Explanation

Question 76 of 88

1

your patient is displaying three or more PVCs in a row, rate of greater than 100 bpm. What are you observing?

Select one of the following:

  • ventricular tachycardia

  • accelerated idioventricular

  • idioventricular

  • asystole

Explanation

Question 77 of 88

1

nonsustained ventricular tachycardia lasts ____________, while sustained VT ________________

Select one of the following:

  • less than 30 seconds, more than 30 seconds

  • more than 30 seconds, less than 30 seconds

  • less than 60 seconds, more than 60 seconds

  • more than 60 seconds, less than 60 seconds

Explanation

Question 78 of 88

1

all of the following are possible causes of ventricular tachycardia, with the exception of;

Select one of the following:

  • acute coronary syndromes, cardiomyopathy and TCA overdose

  • TCA overdose, cocaine abuse, trauma

  • acid-base imbalance, mitral valve prolapse, digitalis toxicity

  • brugada, electrolyte imbalance, invasive cardiac procedures

  • myocardial contusion, abnormal QT interval, stimulants such as caffeine and tobacco

Explanation

Question 79 of 88

1

this phenomenon is a chaotic rhythm originating in the ventricles. It is always pulseless

Select one of the following:

  • ventricular fibrillation

  • idioventricular

  • torsades de pointes

  • asystole

Explanation

Question 80 of 88

1

ventricular fibrillation is not caused by

Select one of the following:

  • environment

  • electrolyte imbalance

  • hypertrophy

  • electrolyte imbalances

  • decreased SNS activity

Explanation

Question 81 of 88

1

the absence of any (ventricular) rhythm

Select one of the following:

  • asystole

  • ventricular fibrillation

  • ventricular tachycardia

Explanation

Question 82 of 88

1

all of the following are causes of first degree AV blocks, with the exception of which of the following;

Select one of the following:

  • AV node ischemia/injury

  • acute MI

  • some meds

  • decreased vagal tone

Explanation

Question 83 of 88

1

This type of block is defined as a prolongation of the PR interval on an ECG to more than 0.20 seconds

Select one of the following:

  • 1st degree AV block

  • type 1, 2nd degree AV block

  • type 2, 2nd degree AV block

  • 3rd degree AV block

Explanation

Question 84 of 88

1

your patient reveals a history of congestive heart failure on digoxin. He does not have any complaints of nausea, palpaitations, or chest pain. You run an ECG, and notice that the rhythm is regularly irregular, and the ratio of Ps to QRSs is 1:1 underlying rhythm and 2:1 where dropped beat occurs. How do you diagnose?

Select one of the following:

  • 2nd degree AV block, type 1

  • 2nd degree AV block, type 2

  • ischemic heart disease

  • 3rd degree AV block

Explanation

Question 85 of 88

1

2nd degree av block type 1 is more serious than 2nd degree av block type 2

Select one of the following:

  • True
  • False

Explanation

Question 86 of 88

1

which of the following is not a cause for type 1, 2nd degree AV blocks

Select one of the following:

  • increased parasympathetic tone

  • anterior wall MI

  • aortic valve disease

  • mitral valve prolapse

Explanation

Question 87 of 88

1

left coronary artery disease, anterior wall MI, and fibrosis of conduction system are all causes of which type of AV block

Select one of the following:

  • 2nd degree, type 1

  • 2nd degree, type 2

  • 1st degree

  • 3rd degree

Explanation

Question 88 of 88

1

your patients ECG reflects a slow rate, with present and upright P waves. You notice that the rhythm is regular for P waves, but irregular for QRS. For instance, the last impulse appeared on the ECG as P wave with no QRS after. These are features of a

Select one of the following:

  • 2nd degree AV block, type 1

  • 2nd degree AV block, type 2

  • 1st degree AV block

  • 3rd degree AV block

Explanation

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