科研之友
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摘要
A 2 year old, totally asymptomatic, intact male Boxer dot! was presented for an annual vaccination, after having received previous vaccinations another veterinary clinic. His appetite and activity levels were reportedly normal.
Physical examination revealed a perfectly normal looking, highly viable clog, of a normal body weight for dog's size and breed. Mucous membranes were moist and pink with a normal capillary refill time. Femoral arterial pulses were regular, strong and lull, with a heart rate of 132/min.
The respiratory rate was 26/min and his rectal temperature is 38.7 degrees C. Respiratory sounds were normal ("broncho-vesicular") over all lung lobes and a Grade IV/VI systolic murmur was auscultated. The murmur was of the "diamond-shaped" type (also termed crescendo-decrescendo), indicating that it first vets louder and then becomes softer throughout each systolic event). The murmur was auscultated over the left hemi-thorax with the point of maximal intensity over the left heart-base.
An electrocardiogram (ECG) tracing was recorded from this patient while in right lateral recumbency, under no chemical sedation, using a 10 mm/mV calibration and a sweep-speed of 50 mm/sec. How can the ECG tracing assist you in narrowing down this list, or even making a definitive diagnosis?
- 出版日期2010
