Arrhythmias - cases

Question 1

What causes Sinus Tachycardia?

Answer 1

• Catecholamine Induced enhanced-normal automaticity

Question 2

What is the most likely cause of an extra P wave that has been inserted into an otherwise normal EKG (aka frequent atrial premature beats - APBs)?

Answer 2

• enhanced normal automaticity because its not happening at a normal rate, but it is still causing a P wave telling you that a SA cell is responsible