Supervising Clinician: Mark D.
Kittleson, DVM, PhD,
|Six-year-old male neutered Boxer dog ("Max")|
|Max first presented to the referring veterinarian
three days ago after an acute collapse.
The owner describes the collapse as a seizure
accompanied by tremors, paddling, urination, and loss of consciousness.
The owner began mouth to nose breathing when the dog
became limp and his tongue turned white after the
seizure. The owner continued breathing for the dog
for approximately three minutes before the dog regained consciousness.
|ECG findings at that
time were consistent with sinus tachycardia. Max was prescribed propranolol 10 mg TID
by the referring veterinarian. |
|Max was slightly lethargic following this visit and had another similar
seizure/collapse episode this morning. Max once again responded after a couple
of minutes of mouth to nose resuscitation. |
|Propranolol and monthly heartworm prevention are the only current
medications. There is no history of trauma.
A melanoma was removed from the right caudal thigh
five months ago.|
| Indoor/outdoor dog.
Two other healthy dogs in house. Current diet is
chicken and rice kibble. |
|Max coughs occasionally. The
cough is dry and not associated with any specific time of day. Max
vomited once after visiting the referring veterinarian's
|T-101.8 P-78 R-60 |
|Max is quiet, alert, and responsive. There is
a surgical scar on the right flank. Ectropion is present OU. Anterior
chambers, sclera, conjunctiva, and lens clear OU. Epiphora OU. Ears
are clean with no discharge. Bilateral serous
discharge from nostrils.
|No atrophy or ataxia noted. No pain on palpation of spine.
|Thoracic auscultation reveals a soft II/VI systolic murmur with PMI
over left apex. Femoral pulses are strong with no deficits. Marked sinus
arrhythmia is noted. MM pink. CRT 1 sec.|
|Lungs clear bilaterally.
|Abdominal palpation is unremarkable.
|All peripheral nodes are within normal limits.
|Two episodes of acute collapse in a Boxer dog|
|Interventricular septal thickness -
1.0 cm (normal)|
|Left Ventricular Free Wall
Thickness in Diastole -
1.0 cm (normal)|
Ventricular Diameter in Diastole
- 4.0 cm (normal)|
Left Ventricular Diameter in
Systole - 2.9 cm (normal)|
|Fractional Shortening - 27%
| Left Atrial Diameter - 2.6
| Aortic Diameter -
2.0 cm (normal)|
|Trivial tricuspid insufficiency|