Which is true regarding the normal Q wave?

A. Which is true regarding the normal Q wave?

 

a. It is always present.

b. It is a small positive deflection from the baseline.

c. It has a duration of less than 0.04 seconds.

d. It is greater than 25% the amplitude of the R wave in that lead.

B. The ST segment

a. contains at least two waves.

b. begins at the peak of the R wave and gradually curves downward to the T

wave.

c. represents right and left ventricular depolarization.

d. is the line that follows the QRS complex and connects it to the T wave.

C.  The normal T wave is

a. perfectly round.

b. not more than 5 mm tall in the limb leads.

c. oriented in the opposite direction of the preceding QRS complex.

d. normally inverted in lead II.

D. Which of the following is supplied by the right coronary artery in most people?

a. Most of the left ventricle

b. Circumflex artery

c. SA nodal artery

d. Perforating intramural septal branches

E.  Myocardial __________ is the most severe result of an interruption

of coronary artery blood flow.

a. ischemia

b. infarction

c. injury

d. interruption

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Characteristics of sinus bradycardia include?

A. Sinus bradycardia   a. often occurs naturally. b. is considered abnormal in athletes. c. is often seen in Wolff–Parkinson–White syndrome. d. is caused by increased sympathetic stimulation. B.  Characteristics….

Match the following sinus dysrhythmias with the correct description.

A.  With sinus arrest, the escape mechanism that follows the pause in electrical   activity may arise from the a. SA node. b. AV junction. c. ventricles. d. All of….

Why is it important to check for a pulse when there are premature beats in the rhythm?

A. Why is it important to check for a pulse when there are premature beats in the rhythm? B. Premature atrial complexes a. are typically preceded by an inverted P9….