Chap 3 Sinus Mechanics

Question 0

The QRS complex normally measures ___ second(s) or less

Answer 0

0.11

Question 1

What is the name of a normal heart rhythm?

Answer 1

Sinus rhythm

Question 2

The PR interval normally measures ___ second and is constant from beat to beat

Answer 2

0.12 to 0.20

Question 3

If the SA node fires at a rate tat is slower than normal for the patients age, the rhythm is called.

Answer 3

Sinus bradycardia

Question 4

If the SA node fires at a rate that is faster than normal for the patients age, the rhythm is called.

Answer 4

Sinus tachycardia

Question 5

______ is a normal response to the body’s demand for increased oxygen

Answer 5

Sinus bradycardia

Question 6

______ begins in the SA node and follows the normal conduction pathway in the heart, resulting In atrial and ventricular depolarization

Answer 6

Sinus arrhythmia

Question 7

What is the most common form of sinus arrhythmia?

Answer 7

Respiratory sinus arrhythmia

Question 8

The rhythm of the SA node is not affected by ______ because impulses are generated regularly

Answer 8

SA block

Question 9

_____ is a disorder of impulse formation

Answer 9

Sinus arrest