Subaortic stenosis has been observed in both muscular and membranous forms.
2.
Puppies and dogs diagnosed with subaortic stenosis can suffer from heart failure and sudden death.
3.
Any animal that has subaortic stenosis should not be bred, because they can definitely pass the defect on to future offspring.
4.
Hypertrophic obstructive cardiomyopathy ( or hypertrophic subaortic stenosis ) will be a systolic crescendo-decrescendo murmur best heard at the left lower sternal border.
5.
An animal might have the genes for SAS, yet have no actual sign of SAS . Also, an animal might have signs of subaortic stenosis, and yet offspring with signs of SAS may not be seen for a couple of generations.
6.
Contraindications for the use of ephedrine include : asymmetric septal hypertrophy ( idiopathic hypertrophic subaortic stenosis ), concomitant or recent ( previous 14 days ) monoamine oxidase inhibitor ( MAOI ) therapy, general anaesthesia with halogenated hydrocarbons ( particularly halothane ), tachyarrhythmias or ventricular fibrillation, or hypersensitivity to ephedrine or other stimulants.
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