Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

SF III Test 1 > ECG III > Flashcards

ECG III Flashcards

1
Q

What is sinus bradycardia and what is its ECG presentation?

A

Slowing of normal heart rhythm <60 bpm

Normal P wave and QRS complex

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

What is a junctional escape rhythm and what is its ECG presentation?

A

Junctional escape beats arise from AV node or His bundle

No P wave (impluse originates below atria)

Normal QRS

Slower rate (40-60bpm)

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

What is a ventricular escape rhythm and what is its ECG presentation?

A

Ventricles are depolarized from a more distal point in the conduction system

Widened QRS, no P wave

Slow rate (15-40 bpm)

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

What is First-degree AV block and what is its ECG presentation?

A

Benign, asymptomatic AV conduction block

Lengthened PR interval (>0.2 seconds)

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

What is Second-degree AV block: Mobitz type I and what is its ECG presentation?

A

Benign AV block

Progressive increase in the PR interval until a single QRS is absent, after which the PR interval shortens to its initial length and the cycle starts over

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

What is Second-degree AV block Mobitz type II and what is its ECG presentation?

A

Conduction block beyond the AV node

Sudden intermittent loss of AV conduction without preceding gradual lengthening of the PR interval

QRS often widened

Indicates severe disease

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

What is Third-degree heart block and what is its ECG presentation??

A

Complete failure of conduction between the atria and ventricles

No relationship between the P waves and QRS complexes

QRS may be widened (distal escape) or normal (AV node escape) depending on where the escape rhythm is being generated

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

What is sinus tachycardia and what is its ECG presentation?

A

SA node discharge rate >100 bpm

Normal P waves and QRS complexes

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

What is an atrial premature beat and what is its ECG presentation?

A

Beats originate from an atrial focus outside the SA node

Earlier than expected P wave with an abnormal shape
QRS is normal

Asymptomatic, but may cause palpitations

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

What is atrial flutter and what is its ECG presentation?

A

Rapid, regular atrial activity at a rate of 180 to 350 bpm

Usually two or more atrial beats per ventricular beat because they reach the AV node during its refractory period

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

What is atrial fibrillation and what is its ECG presentation?

A

Chaotic rhythm with very fast atrial rate (350-600)

No P waves or only a fine, high frequency, very low voltage wavy record

QRS-T normal, except for some irregular timing

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

What are paroxysmal supraventricular tachycardias (PSVT)?

A

Type of sudden onset supraventricular tachycardias that often involve reentry at the AV node, atrium, or accessory pathway

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

What is atrioventricular nodal reentrant tachycardia (AVNRT) and what is its ECG presentation?

A

Most common form of PSVT in adults

P waves may not be apparent (hidden or retrograde) because they’re inscribed at the same time as QRS

tachycardic rhythm

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

What is Ventricular Pre-excitation Syndrome and what is its ECG presentation?

A

Aka Wolff-Parkinson-White Syndrome, Atrial impulses conduct through the accessory pathway and AV node, causing early stimulation of the ventricles

Short PR interval (<0.12 sec)

QRS has as slurred rather than sharp upstrok (delta wave)

Widened QRS

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

What two types of PSVTs are common in patients with Wolff-Parkinson-White syndrome?

A

Orthodromic AVRT - no delta, retrograde P wave

Antidromic AVRT - Widened QRS with retrograde P wave

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

What are ventricular premature beats and what is its ECG presentation?

A

An ectopic ventricular focus fires an action potential

Widened QRS

The ectopic beat has no relation to P wave

T wave has an electrical potential polarity exactly opposite to that of the QRS

17
Q

What are the patterns of ventricular premature beats?

A

Bigeminy - every other beat

Trigeminy - two normal beats then a VPB

Couplet - two VPBs in a row

Triplets - three VPBs in a row

18
Q

What is ventricular tachycardia?

A

A series of three or more VPBs

Very wide QRS (>0.12) and occur at a rate of 100-200 bpm

Can be monomorphic or polymorphic

19
Q

What does monomorphic ventricular tachycardia indicate?

A

Structural abnormality that supports a reentry circuit

20
Q

What does polymorphic ventricular tachycardia indicate?

A

Continually changing reentry

Torsades de pointes (waxing and waning pattern)

Long QT

21
Q

What is ventricular fibrillation and what is its ECG presentation?

A

Disordered, rapid stimulation of the ventricles with no coordinated contractions, immediately life-threatening

Chaotic, irregular appearance without discrete QRS waveforms

SF III Test 1 (27 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions