Exam 1 Cardio

Question 1

Elevated T waves or U

waves are indicative of what?

Answer 1

Potassium problems

Question 2

Normal magnesium levels

Answer 2

1.6 to 2.6

Question 3

Normal sodium levels

Answer 3

135 to 145

Question 4

Normal calcium levels

Answer 4

8.4 to 10.2

Question 5

Represents the time it takes for both ventricles to depolarize and repolarize

Answer 5

QT interval

Can range from 0.2-0.4

Question 6

Represents ventricular repolarization

Answer 6

T wave

Question 7

The isoelectric., The plateau phase; both ventricles are completely depolarized; if Depressed or elevated this could indicate ventricular ischemia or hypoxia

Answer 7

ST segment

Question 8

Represents ventricular depolarization

Answer 8

QRS complex; normal duration is 0.06-0.1

Question 9

Beginning of the P-wave to the beginning of the QRS complex

Answer 9

PR interval; normal duration is 0.12-0.2

Question 10

Normal QT interval duration?

Answer 10

0.2 to 0.4

Question 11

Normal PR interval?

Answer 11

0.12 to 0.2

Question 12

Normal QRS Length

Answer 12

0.06-0.1

Question 13

Normal t wave height

Answer 13

0.1-0.3

Question 14

For a patient in sinus bradycardia showing symptoms, what are you do?

Answer 14

1. Oxygen
2. Atropine 0.5 mg IV repeat 3-5 min….max dose able to give is 3mg

Second line medication treatment for bradycardia;

Dopamine
Epinephrine

If none of this is working you get the patient ready for transcutaneous pacing; hook them up to the electoral pads and get pain medication ready

Question 15

What does atropine do?

What’s the dose for it?

Answer 15

Atropine increases the heart rate

Dose for sinus bradycardia: 0.5 mg IV, repeat 3-5 minutes
Max: 3 mg

Question 16

Second line treatment for sinus bradycardia

Answer 16

Dopamine

Epinephrine

You only give these if oxygen and atropine is not working

Question 17

What is a heart block ?

Answer 17

A block in the electrical activity of the heart