Falling over, sudden weakness, or syncope (temporary loss of consciousness due to low blood flow to the brain characterized by rapid onset, short duration), seizures, low blood glucose, and certain metabolic diseases which can also result in temporary loss of blood flow to the brain.
We can address syncope caused by:
– Cardiac arrhythmia (first and most common cause of syncope)
– Low heart rate and low blood pressure
– Structural heart diseases that reduce cardiac output and brain blood flow
– Impending congestive heart failure; and excess fluids in the heart sac
– Intense activity, excitement, coughing, urination or vomiting/gagging (situational syncope which is the second most common cause of syncope in veterinary medicine)
Our risk stratification system during triage helps determine if the cause of syncope is life threatening (arrhythmia) and can provide timely treatment when needed. Non-life-threatening causes of syncope, such as coughing or medication overdose, once recognized as lower risk, allows for the patient to be safely discharged from the emergency room for monitoring and a scheduled diagnostics work up.
We adopt the risk stratification system used in human patients using the following criteria (CHESS):
– Congestive heart failure history
–Hematocrit (packed cell volume) <30%
– Electrocardiogram (ECG)
– Shortness of breath
– Systolic blood pressure <90mmHG or >200mmHG
We bring our mobile ECG straight to the patient during triage, which can provide a definitive diagnosis of syncope with any of the following:
– Persistently low heart rate <50 bpm in patients with advanced atrial-ventricular block
– Atrial standstill
– Sinus pauses > 6–8 seconds.
We deploy real time point-of-care ultrasounds to evaluate excess fluid within the heart sac, enlarged atria (heart chamber), or inadequate cardiac filling in patients suspected of having a cardiac cause of collapse/syncope. Excess fluid within the heart sac, severe aortic or pulmonic stenosis, very high pulmonary artery pressure, obstructive tumors or clots may be evident upon examination.
We utilize information from our full in-house blood work serum biochemistry to detect electrolyte abnormalities associated with deteriorating endocrine disease in dogs, high potassium associated with low heart rate, or low thyroid associated with arrhythmias in cats. Cardiac biomarkers can now detect heart muscle cell changes in early heart disease much sooner than imaging can detect.