HR (Heart Rate)
The frequency of cardiac ventricular contractions, measured in beats per minute (bpm).
💬 In Plain English
HR stands for Heart Rate, which is the number of times your pet’s heart beats in one minute (bpm). In cats, normal heart rates are naturally fast, typically 140 to 220 bpm. In dogs, heart rate varies dramatically by size: a giant Great Dane may have a slow, relaxed heart rate of 60 bpm, while a tiny Chihuahua may have a normal heart rate of 140 bpm. Veterinarians count the beats using a stethoscope while simultaneously feeling the pulse in the hind leg (femoral artery) to ensure every heart squeeze produces a pulse wave.
🔬 Clinical & Technical Depth
For Vets & TechniciansFormal Clinical Definition
Frequency of cardiac cycles expressed in beats per minute (bpm), determined via stethoscope auscultation and evaluated for rhythm regularity and pulse deficit concordance.
Why Veterinarians Use It
Veterinarians assess HR to detect tachycardia (abnormally fast rate from pain, fear, fever, or shock) or bradycardia (abnormally slow rate from Addison’s, hypothermia, or heart block).
Clinical Context Encountered
Found in the physical exam vital signs section of every medical chart.
Clinical Reference Guide (Prescription / Chart Abbreviation)
How many times the heart beats in one minute (bpm).
Where You Encounter It
- Physical exam vital signs
- Anesthesia monitoring logs
- Cardiology evaluations
- •A heart rate below 60 bpm in a weak, collapsing dog can indicate hyperkalemia from an acute Addisonian crisis or complete heart block.
❓ Questions to Ask Your Veterinarian
Take these actionable questions with you to your next clinic visit or appointment:
- 1Was my pet’s heart rate fast due to clinic stress (white coat syndrome) or an underlying cardiac issue?
- 2Were any skipped beats (pulse deficits) detected between the stethoscope and the femoral pulse?
Academic & Clinical References
- ACVIM Physical Examination and Cardiovascular Assessment StandardsOrganization: American College of Veterinary Internal Medicine (ACVIM) • Accessed: 2026-01-10https://www.acvim.org