Which of the following may cause premature beats?
I.Local areas of tissue hypoxia
II.Mechanical irritation of the tissue
III.Toxic irritation
IV.Drugs

Question

Quizplus · Accepted Answer

Conditions that may cause premature beats include 
(1) local areas of tissue hypoxia (ischemia); 
(2) mechanical irritation produced by calcified plaque in a diseased heart; and 
(3) toxic irritation caused by nicotine, caffeine, or other drugs.

Which of the Following May Cause Premature Beats