Cascade testing for inherited cardiac conditions: Risk perception and screening after a negative genetic test result.

ABSTRACT

First-degree relatives of a proband with an inherited cardiac condition (ICC) are offered predictive genetic testing for the pathogenic or likely pathogenic (P/LP) cardiac gene variant (CGV) to clarify their risk for the familial condition. Relatives who test negative for a familial P/LP CGV typically do not require longitudinal cardiac surveillance. To our knowledge, no previous study has investigated adjustment to risk reduction and subsequent screening practices in genotype-negative relatives from an ICC population. We thus investigated risk perception and ongoing screening practices in genotype-negative adults who received cardiac genetic counseling. Correlations between clinical and demographic variables and risk perception and screening practices were also investigated. On average, participants (n = 71) reported a perceived 19.5% lifetime risk of developing the ICC in their family, despite their negative genetic test result. The majority (54%) of participants reported having undergone cardiac screening after disclosure of their negative result. There were no significant correlations between clinical and demographic variables and risk perception or screening practices. Furthermore, risk perception was not found to impact the likelihood of cardiac screening. These findings suggest that even with comprehensive cardiac genetic counseling, a proportion of this population did not accurately comprehend or recall their cardiac disease risk. Additional interventions beyond traditional result disclosure should be explored to help genotype-negative individuals adjust to their reduction in risk for a familial ICC.