Final answer:
The three types of SA node dysrhythmias are sinus tachycardia, sinus bradycardia, and sinus arrhythmia.
Sinus tachycardia is a faster than normal heart rate, sinus bradycardia is a slower than normal heart rate, and sinus arrhythmia is an irregular heart rhythm that varies with breathing.
Step-by-step explanation:
The three types of SA node dysrhythmias are sinus tachycardia, sinus bradycardia, and sinus arrhythmia.
Sinus tachycardia is a faster than normal heart rate, usually above 100 beats per minute.
Sinus bradycardia is a slower than normal heart rate, usually below 60 beats per minute. Sinus arrhythmia is an irregular heart rhythm where the heart rate varies with breathing.