A. Describe how increases or decreases in the potassium and calcium
serum levels effect the ECG.
B. Prolonged QT intervals are associated with
a. atrial fibrillation.
b. complete AV heart block.
c. sinus bradycardia.
d. torsades de pointes.
C. ECG changes associated with digoxin use include a(n)
a. longer QT interval.
b. elevated ST segment.
c. gradual downward curve of the ST segment.
d. shorter than normal PR interval.
D. The most common dysrhythmia seen with digoxin toxicity is
b. paroxysmal atrial tachycardia with 2nd-degree AV heart block.
c. junctional tachycardia.
d. torsades de pointes.
E. On the following illustrations draw an example of
a. tall T waves.
b. sine waves.
c. U waves.
