A dog is excited in the examining room and has a heart rate of 170 bpm. When hooked up to ECG, there is a regular sequence of P, QRS, and T waves. The patient has consistent P-P and P-R intervals. Which of the below is most likely true in your patient?
A. sinus bradycardia
B. sinus tachycardia
C. sinus arrest
D. supraventricular tachycardia