EKG lecture

Question 1

Diagnostic tool → ElectroKardioGram (EKG)

Question 2

_________ : record of action potentials (conduction through the
body fluids – recording the change in potential

Answer 2

EKG

Question 3

EKG : represents hearts ______________ activity

Answer 3

electrical

Question 4

Electrical activity → Myocardial ____________

Answer 4

contraction

Question 5

Contraction → _______________(ions moving into the
myocardial cells)

Inside of the cell becomes positive

Answer 5

depolarization

Question 6

Relaxation → _____________ (ions moving out of the
myocardial cells)

Inside of the cell becomes negative

Answer 6

repolarization

Question 7

A ____________ consists of a positive and a negative electrode, which
detects the flow of electrical current between two electrodes

Answer 7

lead

Question 8

A lead views the heart’s electrical activity from the position
of the positive electrode as it looks toward the direction of
the negative electrode

Question 9

P wave represents atrial ____________

Answer 9

depolarization

Question 10

PR segment- AV node into the His-Purkinje system

Question 11

PR interval = P wave + PR segment

Question 12

QRS complex- ventricular ___________

Answer 12

depolarization

Question 13

ST segment- the early phase of ventricular repolarization

Question 14

T wave- ventricular repolarization

Question 15

QT interval = QRS complex + T wave

QTc calculates in the influence of HR on the QT interval

QTc = QT interval /√ of R to R interval

U wave- Purkinje fiber repolarization

Question 16

Rate measurement

Normal range : 60-100bpm

Question 17

Rate measurement

(Six-second method)

For the atrial rate- multiply the number of P waves times 10

For the ventricular rate- multiply the number of QRS complexes times 10

Question 18

An________________rhythm
R-R intervals are not the same and there is no repeating pattern of irregularity

Answer 18

irregularly irregular

Question 19

A __________________ rhythm R-R intervals are not the same, but there is a repeating pattern of irregularity

Answer 19

regularly irregular

Question 20

__________ rate more than 100 beats/min

Answer 20

Tachycardia

Question 21

___________- rate < 50 beats/min

Answer 21

Bradycardia

Question 22

Normal sinus rhythm (NSR)

Rhythm- regular
Rate- 60-100 beats/min

Question 23

Sinus bradycardia

Rhythm- regular
Rate- < 50 beats/min

Question 24

Sinus tachycardia
Rhythm- regular
Rate- 101-180 beats/min
P wave- uniform in appearance

Question 25

Atrial Flutter

P wave- replaced with saw-toothed “flutter” waves

Question 26

Ventricular FLUTTER

Rhythm- atrial irregular, ventricular irregular
Typically rate is at 250-350 beats/min
Sine wave appearance

Question 27

Atrial Fibrillation