Electrocardiograph

Question 1

What is an EKG?

Answer 1

recording of the electrical activity of the heart

Question 2

True or False: do most EKGs involve a 12 lead placement?

Answer 2

true

Question 3

What do depolarization and repolarization ccause the atria and ventricles to do

Answer 3

contract and relax, respectively

Question 4

What happens in depolarization?

Answer 4

all cells become positive

Question 5

What happens in repolarization?

Answer 5

cells go from a positive state to a negative state

Question 6

What happens in hyperpolarization?

Answer 6

allows heart to reset and rest

Question 7

What is normal heart rate between?

Answer 7

60-100 bpm

Question 8

What is the heart rate of a parosxysmal tachycardia?

Answer 8

150-200 bpm

Question 9

What is the heart rate of a flutter?

Answer 9

200-350 bpm

Question 10

What is the heart rate of a fibrillation?

Answer 10

350-450 bpm

Question 11

What is a paroxysmal tachycardia casued by?

Answer 11

an irritable focus or node can cause a sudden increase in heart rate

Question 12

What is a flutter caused by? What does an atrial and ventricular flutter look like?

Answer 12

• an irritable focus or node can casue a sudden increase in heart rate
• atrial: sawtooth
• ventricular: smooth up and down

Question 13

What is a fibrillation caused/described by? What do the atrial and ventricular fibrillations look like?

Answer 13

• rapid, irregular, adn unsynchronised contraction of the heart muscle fibres
• atrial: no pattern vs atrial flutter. Large rise with several small inbetween
• ventricular: absolutely no pattern once so ever

Question 14

What is a conduction block? How much communication? What does it look like?

Answer 14

along the pathway of electrical innervation, the conduction is blocked, causing miscommunication betweent eh atria and the ventricules

• varying degrees (some communication to no communication)
• One rise with stright line in betwen and two small atrial beats along straight line
  ps. should always be atrial contraction before ventricular wave and the atrial and ventricular waves are not close to each other