Question 1
The rhythm in Figure 3 is

◦ sinus tachycardia.
◦ sinus arrhythmia.
◦ sinus rhythm.
◦ sinus bradycardia.
Question 2
Which of the following is TRUE about sinus rhythm?
◦ It has multiple shapes of P waves.
◦ It has wide QRS complexes without preceding P waves.
◦ It is regular.
◦ It has an irregularly irregular pattern of QRS complexes.