210. Family History of Premature ASCVD with Dr. Ann Marie Navar

CardioNerds (Amit Goyal and Daniel Ambinder), Dr. Ahmed Ghoneem (CardioNerds Academy Chief of House Taussig and medicine resident at Lahey Hospital), and Dr. Gurleen Kaur (Director of CardioNerds Internship and medicine resident at Brigham and Women’s Hospital) discuss family history of premature ASCVD with Dr. Ann Marie Navar, Preventive Cardiologist and Associate Professor in the Departments of Internal Medicine and Population and Data Sciences at UT Southwestern Medical Center. They discuss the art of soliciting a nuanced family history, refining cardiovascular risk using risk models and novel markers, counseling patients with elevated risk, and more. Show notes were drafted by Dr. Ahmed Ghoneem and reviewed by Dr. Gurleen Kaur. Audio editing was performed by CardioNerds Intern, student Dr. Adriana Mares.

For related teaching, check out this Tweetorial about CAC by Dr. Gurleen Kaur, the Family History of Premature ASCVD Infographic by Dr. Ahmed Ghoneem, and the CardioNerds Cardiovascular Prevention Series.

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Show notes - Family History of Premature ASCVD with Dr. Ann Marie Navar

Patient summary: Mr. B is a 51-year-old gentleman who is referred to CardioNerds Prevention Clinic by his PCP. He does not have a significant past medical history. He is a former smoker but quit 2 years ago. His BP in clinic today is 138/84; he is not on any antihypertensives. His most recent lipid profile 2 weeks prior showed a total cholesterol level of 250 mg/dL, a TG level of 230 mg/dL, an LDL cholesterol of 174 mg/dL, and an HDL cholesterol of 30 mg/dL. He tells us that his father had a “heart attack” at the age of 52, and he would like to further understand his own risk. We calculate his ASCVD risk score, and it is 9.8%.

1. What constitutes a positive family history (FHx) of premature ASCVD? What is an approach to the art of soliciting the FHx from our patients?

Definition of family history of premature ASCVD: the history of an atherosclerotic event (e.g., myocardial infarction or stroke) in a male first degree relative before the age of 55 or a female first degree relative before the age of 65.

Dr. Navar’s approach to soliciting a family history:Lead with a general question such as “what do you know about any medical conditions that run in your family?”.Then ask more specific questions about the parents and siblings, such as “Is your mother still alive? How long did she live? Has she ever had a heart attack or stroke?”If the answer is yes, ask about how old they were at the time of the event.A challenging aspect of the FHx can be eliciting the difference between atherosclerotic events and sudden cardiac death. While atherosclerotic diseases are a much more common cause of unexplained sudden death, it's important that we don't miss the opportunity to identify inherited cardiomyopathies, channelopathies, inherited aortopathies or other heritable SCD syndromes.

2. Is the “dose” of family history important (for example: the number of affected relatives, the closeness of those relationships, the age of onset)?

While conducting studies to test this may be difficult, the few studies that have looked at the number of affected relatives have found a dose-response type relationship, where increasing number of relatives affected increases the risk of heart disease.1,2

3. How does a family history affect cardiovascular risk stratification?

FHx of premature ASCVD does not improve the predictive ability of the Pooled Cohort Equations (PCE) at a population level. Therefore, it does not factor into the ASCVD risk calculation utilizing the PCE.

However, it enhances the patient’s risk at an individual level. The ACC/AHA guidelines recognize FHx of premature ASCVD as a risk-enhancing factor [together with CKD, chronic inflammatory conditions such as psoriasis, primary hypercholesterolemia, high-risk ethnicity such as South Asian ancestry...