disturbances in Rhythm Flashcards Preview

block 12 module 4 > disturbances in Rhythm > Flashcards

Flashcards in disturbances in Rhythm Deck (48):
1

indications for ordering an ECG

1.To determine cardiac rate
2.define cardiac rhythm
3.To diagnose old or new (MI)
4.To identify conduction disturbances
5.To aid in the diagnosis of heart diseases

2

3 reasons for using an ECG

detection of ischemia
arrhythmia
hypertrophy

3

rhythm is used to refer to what

part of the heart which controls activation sequence

4

12 lead ECG system includes

3 Bipolar leads
3 modified unipolar leads
6 precordial leads

5

why is there no unipolar lead for the right foot

it fxns as a ground lead

6

the 6 precordial leads are used to record

horizontal impulses

7

v4R is the most useful lead in recording a

R-sided ECG

8

15 lead ecg system is used in

pedia patients

9

Additional right precordial leads can be used to assess right ventricular abnormalities such as

hypertrophy and infarction

10

Electrode locations posterior to V6 can be used to help detect what

acute postero-lateral infarction

11

important in determination of the type of MI

ST-T wave

12

duration of ventricular depolarization and repolarization

QT interval

13

rate of atrial or sinus cycle

PP interval

14

rate of ventricular cycle

RR interval

15

Duration of P wave

<120 ms

16

duration of PR interval

120-220 ms

17

duration of QRS complex

<110-120

18

duration of corrected QT interval

440 - 460

19

PR interval is important in determining the presence of

1st deg AV block

20

Prolonged QT interval may mean

underlying malignancy

21

T wave represents what?

repolarization of ventricles

22

how do you monitor atrial repolarization?

electrophysiologic testing

23

Left axis deviation is seen in

LVH

24

what is cardiac axis

average direction of spread of the depolarization wave thru the ventricles

25

Direction of the axis can be derived most easily from

QRS complex in leads I-III

26

in px w/ 3rd deg AV block the firing of the electrical conduction comes from the

myocardium

27

medical procedure by which a tachycardic heart or an arrhythmic one is converted to a state of having normal heart rhythm through the
use of electrical impulses or drugs.

cardioversion

28

RR>100bpm
P wave is present before each QRS and all P waves are identical
PR interval =0.12-0.2
what is this

sinus tachycardia

29

sinus arrhythmia in the elderly could signify the presence of

sinus node dysfunction

30

An irregularly irregular sinus arrhythmia could indicate

atrial fibrillation or atrial flutter.

31

picket fence or saw toothed appearance

atrial flutter

32

absence of discernible P wave

A-Fib

33

most common causes of cardiac stroke in the elderly

A flutter and A fib

34

in this rhythm P wave is either inverted absent or after QRS

Junctional rhythm

35

in this rhythm there is a prematurely occuring QRS complex that is wide and bizarre looking

PVC

36

series of PVC

v-tach

37

why v-tach is not compatible with life

severe amt of v contractions does not allow enough time to fill the v which will lead to cardiac standstill, sudden death is common

38

2 most common dysrhythmia occuring in the 1st hr of MI that could cause death

v tach and v fib

39

absenece of any discernible wave form

v-fib

40

There is extreme sinus bradycardia with irregular idioventricular rhythm and occasional atrial activity.

agonal rhythm

41

flat line

asystole (ventricular standstill)

42

this is usu 2ndary to epi or norepi overdose

accelerated idioventricular rhythm

43

describe a sinoatrial escape

There are the same PQRS complexes but with an atrial escape rhythm.There are the same PQRS complexes but with an atrial escape rhythm

44

There is progressive prolongation of the P-R interval with each succeeding beat until one P wave occurs without a QRS, that is to say a dropped beat.

2nd degree AV block type 1 wenkebach

45

There is a dropped beat without prolongation of the P-R interval

type 2 2nd deg AV block

46

2nd deg AV block is usu due to a block in

AV bundle on the tricuspid

47

where is the block if vent rate is around 60 and a narrowed QRS complex (3rd deg AVB)

above the bundle of His

48

Vent rate and QRS in Infrahisian type AVB

V rate is around 40 and wide QRS