What a cardiac clearance confirms
The fourth document in the orthopaedic trio's shadow: what a breeding golden's cardiac exam actually records, who is qualified to read it, and what a clear result does not promise.
Signed from the field · Joan Merrit · checked by Ellis Ward · 923 words
A cardiac clearance certifies one thing: that a qualified examiner listened to this dog's heart, on a given date, and recorded what was heard. It does not certify a healthy heart for life, and it is not the same document twice depending on who signs it.
The two levels of exam
The OFA, the registry that certifies these results, keeps its cardiac records at two levels. The basic exam is auscultation by any licensed veterinarian: listening with a stethoscope for the sound of a murmur, a turbulent flow where blood should move quietly, and grading what is heard on a standard numbered scale. The advanced exam is performed by a board-certified veterinary cardiologist, and since October 2020 the OFA requires it to include an echocardiogram, an ultrasound image of the heart's chambers and valves in motion. The Golden Retriever Club of America asks for the higher bar: its screening guidance says prospective breeding dogs should be examined by a board-certified veterinary cardiologist after twelve months of age, with normal results certified by the OFA. The two levels are not interchangeable: a general practice vet's clean auscultation and a cardiologist's clean auscultation-plus-echo are different documents with different weight, and a serious listing names which one was performed. A murmur, when one is heard, is graded on a standard six-step scale running from a very soft Grade 1, caught only on careful listening, to a loud Grade 6 that can still be heard with the stethoscope lifted off the chest; the grade is itself a record worth asking for, not just a pass or fail.
Timing and the innocent murmur
Many puppies carry a soft, so-called innocent murmur in their first months, a sound that resolves on its own as the heart finishes developing and carries no lasting significance. This is exactly why the OFA only issues a cardiac certification at twelve months of age or older, treating an exam at eight to ten weeks as information for the owner rather than a clearance: a structural defect like subvalvular aortic stenosis is more reliably distinguished from an innocent puppy murmur once the heart has matured, and a clearance dated too early in a dog's life is a weaker document than one dated later.
The named risk in this breed
The golden retriever carries two cardiac conditions worth naming specifically, because the exam exists to catch them. Subvalvular aortic stenosis, a narrowing just below the aortic valve, is described by the Golden Retriever Club of America as the most common congenital heart disease in the breed; it can produce a murmur audible from puppyhood or, in milder cases, only become clearly audible as the dog matures, which is why a single early clearance is not treated as final. Dilated cardiomyopathy, a weakening of the heart muscle itself, belongs to a different family: it is an adult-onset disease rather than a congenital one, and the OFA's advanced database records it separately from the congenital result. That is one reason an echocardiogram carries more weight than auscultation alone for a dog entering a breeding programme: a stethoscope hears turbulence, while the ultrasound shows the muscle and chambers themselves.
What the clearance actually certifies
The clearance certifies the exam: that on a dated visit, a named examiner at a stated qualification level listened to or imaged this specific dog's heart and found it clear, or found and graded a murmur. Results submitted through the OFA's Cardiac Database become a checkable, dated record tied to the dog's registered identity, the same logic as the OFA's hip and elbow databases. It is a third-party record, not a breeder's assurance.
What it does not certify
A clear cardiac exam at one year old does not certify the heart at five years old. Some conditions, subvalvular aortic stenosis among them, can be present but too subtle to hear at an early exam and become audible later; others are acquired rather than congenital and have no reason to show up early at all. This is why the OFA's advanced database splits its clearance in two: the congenital result stands once issued, while the adult-onset result is valid for one year only and has to be renewed by a fresh exam. Nor does a cardiac clearance say anything about the hips, elbows or the DNA panel; each of those lives in its own document, read under its own protocol, by its own kind of specialist.
Reading a listing
The practical read asks three questions: which level of exam, by whom, and when. "Heart tested" with no level named is the phrase doing the work the missing specifics should do. "Cardiologist cleared, OFA Cardiac Database, [date]" is a record a buyer can ask to see and a registry can confirm independently. A listing that shows a cardiac result for only one parent, or an undated result, is showing half a document.
The pattern holds across every document in this file: a hip score, a DNA panel entry and a cardiac clearance are all dated opinions under a named protocol, not verdicts on the puppy. Read together, across both parents, they build a file worth trusting precisely because none of them claims more than it can.
The mended sentence
The loose sentence says the heart is certified. The mended sentence says a named examiner, at a stated level, listened or looked on a given day and recorded exactly what was there, which is a smaller claim than "healthy heart" and a far more useful one.
