"What is SRR?" we hear you ask. SRR refers to Sleeping Respiratory Rate and it is very useful in the assessment of the onset or reoccurrence of left sided congestive heart failure (CHF) in both dogs and cats. The good news is you can easily perform this test at home!
Left sided congestive heart failure occurs with many of the common cardiac diseases in our pets. When pressure in the top left heart chamber increases and blood backs up into vessels within the lung, it results in fluid accumulating in the lungs. This fluid, referred to as pulmonary oedema, causes an increase in your pet's respiratory rate.
How to monitor Sleeping Respiratory Rate
The recording should be done when the animal is asleep in a thermo-neutral environment (ie, not too cold, not too hot). This should be repeated daily for 2-3 days (to get a baseline variation), and then once or twice weekly.
Normal SRR
Normal SRR in dogs and cats is less than 30 breaths per minute, often in the high teens or low 20s. Consistent SRR greater than 30 breaths per minute in patients with underlying heart disease is strongly suggestive of developing CHF (although respiratory disease needs to also be ruled out).
What to do if the SRR is high
Contact us if your pet's SRR is consistently over 30 breaths per minute. If everything else suggests CHF as the cause, we may perform chest X-rays and start your pet on a medication trial.
An elevated SRR can also be caused by high blood pressure, anaemia, pneumonia, heat stress or a fever so if you are concerned about your pet it is best to arrange a check up with us as soon as possible.
|