ECG: Sinus

Question 1

what are dysrhythmias?

Answer 1

irregular heartbeat that occurs as a result of altered conduction, automaticity or both
-need to be concerned with how they effect activity and how activity effects them

Question 2

What can happen with the following dysrhythmias?

• sinus tachycardia
• ventricular tachycardia
• atrial flutter

Answer 2

• increase HR palpitations
• increase myocardial oxygen demand; angina infarction
• decrease CO
• decrease ventricular filling/end diastolic volume

Question 3

What can happen with following dysrhythmias?

-atrial fibrillation

Answer 3

• no atrial contribution to ventricular filling
• decrease ventricular filling time
• decrease ventricular filling/end diastolic volume
• decrease CO

Question 4

What can happen with following dysrhythmias?

-sinus bradycardia

Answer 4

-decrease HR and CO

Question 5

What can happen with following dysrhythmias?

-ventricular tachycardia/fibrillation

Answer 5

-decrease/no CO

Question 6

what is assessed with a 3 lead system?

Answer 6

HR and heart rhythym

Question 7

what information is obtained from a 12 lead?

Answer 7

-hypertrophy
-infarction
additionally

Question 8

Where does Lead I go?

Answer 8

extends from the right to the left arm

Question 9

where does a Lead II go?

Answer 9

extends from the right arm to the left foot

Question 10

Where does lead III?

Answer 10

extends from the left arm to the left foot

Question 11

how big are the little boxes on the ECG strip?

Answer 11

0.04 sec

Question 12

how big are the big boxes on the ECG strip?

Answer 12

0.2 secd

Question 13

what is regular for the PRI?

Answer 13

0.12-0.20 sec

Question 14

what is regular for the QRS?

Answer 14

0.04-0.11 sec