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spdx311 > ELECTROCARDIOGRAPHY > Flashcards

ELECTROCARDIOGRAPHY Flashcards

1
Q

He demonstrated the direct contact with the electrical
generator or ground on electrical conductor could lead to a
muscle contraction in a frog leg.

A

Luigi Aloisio Galvani in 1786

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2
Q

They confirmed that an electrical current accompanies each
heart beat by applying a galvanometer to the base and
apex of an exposed ventricle.

A

Rudolph von Koelliker and Heinrich Muller in 1856

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3
Q

realizes that
electricity is associated with the heartbeat.

A

Carlo Matteucci in 1842

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4
Q

analyzes the electric pattern
of frog’s heart.
* He used the electrometer to record the
electrical activity of the exposed frog hear

A

marey

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5
Q

, credited for the invention of
EKG
* Developed the elegant, reliable and
sensitive string galvanometer. He was able
to record electrical forces of the heart from
the hands and feet of the subject without
even addressing death.

A

William Einthoven

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6
Q

non-invasive diagnostic test that evaluates your
heart’s electrical system to assess for heart disease.

A

electrocardiogram or ecg

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7
Q

Converts the heart’s electrical activity into lines called

A

waveforms

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8
Q

contraction of any muscle is
associated with electrical changes called

A

depolarization

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9
Q

Einthoven name the wave form produce by hearts electrical
system

A

P, Q, R, S, T

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10
Q

considered the pacemaker of the heart.
* The conductivity of the heart, normally follows an electrical
pathway

A

SA node

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11
Q

rapid heart rate

A

tachycardia

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12
Q

slow heart rate

A

bradycardia

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13
Q

irregular heart rate

A

Arrhythmia

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14
Q

REASONS WHY ECG IS DONE

A

If the patient had heart disease in the past.
* If the patient has a medical condition that predisposes to
heart disease, such as hypertension, diabetes, high
cholesterol, or inflammatory disease.
* If the patient has other significant risk factors for cardiac
disease.

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15
Q

INDICATIONS

A

heart arrhythmias
Myocardial infarction (heart attack)
Coronary artery disease (CAD)
congenital heart defects (CHD)

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16
Q

Are applied at specific locations on the patient’s chest
wall and extremities to view the heart’s electrical
activity from different angles and planes

A

electrodes

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17
Q

graph paper used to measure rates of impulse
formation and the duration of the electrical events that
occur in the heart

A

ecg paper

18
Q

Each Small box is equal to

A

0.04 seconds of time

19
Q

Each large box is equal to

A

0.20 seconds of time

20
Q

ECG recorder compares the electrical activity detected in
different electrodes. The electrical picture is called

A

LEAD

21
Q

The ECG is made up of 12 characteristic views of the heart

A

o 6 from limb leads
o 6 from chest leads

22
Q

Electrode positioned in the 4th intercostal space in
the right sternal border

A

V1

23
Q

4th ICS in the left sternal border

A

V2

24
Q

Midway between V2 and V4

A

V3

25
Q

5th ICS in the left midclavicular line

A

V4

26
Q

Same level as V4, anterior axillary line

A

V5

27
Q

Same level as V4 and V5, midaxillary line

A

V6

28
Q

represents atrial contraction
o The shape of it remains the same unless it is
degenerated from different focus.

A

P wave

29
Q

represents ventricular depolarization composed of 3
waves

A

QRS wave

30
Q

is the first negative deflection

A

Q wave

31
Q

is the first positive deflection after the P
wave

A

R wave

32
Q

is the negative deflection following R
wave

A

S wave

33
Q

Normal duration of QRS complex. represented by three small
squares

A

0.08 to 0.12 seconds

34
Q

Measured from the beginning of P wave to the
beginning of QRS complex

A

PR Interval

35
Q

The normal PR interval is ______. represented
by 3-5 small squares.

A

0.12 to 0.2 sec

36
Q

an isoelectric line representing early ventricular
repolarization

A

ST segment

37
Q

represents ventricular repolarization
o usually positive, rounded and slightly asymmetric

A

T test

38
Q

results from slow repolarization of ventricular Purkinje
fibers
o more common in lead V3

A

U wave

39
Q

represents total time required for ventricular
depolarization & repolarization
o from the beginning of QRS complex to the end of T
wave

A

QT interval

40
Q

normal QT interval is

A

0.36 to 0.45 seconds

spdx311 (10 decks)

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