Mode
Text Size
Log in / Sign up

Cardiac genetic testing mainstreaming increases uptake and reduces wait times but lowers informed decision makingCardiac genetic testing in clinics increased access but reduced informed decision making

AI-generated summary of the cited source, checked by automated accuracy review. How we work

Key Takeaway
Consider that mainstreaming cardiac genetic testing improves access but may compromise informed decision making without structured education.

This observational study compared two pathways for genetic testing in patients diagnosed with hypertrophic or dilated cardiomyopathy. One pathway offered testing through a mainstreaming model conducted in cardiology clinics, while the comparator involved referral to Medical Genetics where patients attended either an online webinar or a one-on-one genetic counseling appointment. The primary outcomes examined were uptake of testing, time to testing, informed choice, and patient satisfaction.

Mainstreaming demonstrated higher uptake of genetic testing (82%) compared with referral to Medical Genetics (69%). It also substantially reduced wait times, with patients referred to Genetics waiting a median of 94-185 additional days. However, informed decision making was significantly lower in the mainstreaming pathway, with only 62% of patients considered informed compared to 91% of patients who attended the Medical Genetics webinar (p < 0.01). Patient satisfaction with decision-making was reported as high across both pathways.

No safety or adverse event data were reported for this study. Key limitations include the observational design, which prevents causal inference, and the lack of reported sample size, which limits assessment of statistical power and generalizability. The timeframe was limited to September 2024 through September 2025.

For clinical practice, these findings suggest that integrating genetic testing into cardiology clinics can improve access and reduce delays, potentially addressing barriers to genetic evaluation. However, the significantly lower rate of informed decision making in the mainstreaming pathway highlights the importance of incorporating structured education components when implementing such models. Clinicians should recognize that while mainstreaming may increase testing rates, it may not adequately support patient understanding without dedicated educational interventions.

This study looked at two different ways to offer genetic testing to people diagnosed with hypertrophic or dilated cardiomyopathy, which are conditions that affect the heart muscle. One approach, called 'mainstreaming,' offered testing directly in cardiology clinics. The other approach was the traditional referral to a Medical Genetics service, where patients could attend a webinar or a one-on-one counseling appointment.

The researchers found that when testing was offered in the cardiology clinic, more patients chose to get tested (82% vs. 69%) and they waited much less time—sometimes over three to six months less. However, a key finding was that only 62% of patients in the clinic pathway were considered to have made a fully informed decision, compared to 91% of those who attended the Medical Genetics webinar.

Patient satisfaction with their decision was high in both groups. The study did not report on any safety concerns. It's important to be careful because this was an observational study, which means it can show a link between the testing pathway and the outcomes, but it cannot prove that one caused the other. The sample size and specific time period were also not fully reported. For patients, this research suggests that getting genetic testing in a cardiology clinic can be faster and more accessible, but it highlights the crucial need for good education to help people understand their choices fully.

What this means for you:
Offering heart gene tests in clinics got more people tested faster, but fewer made fully informed decisions compared to a genetics webinar.

Study Details

EvidenceLevel 5
PublishedApr 2026
View Original Abstract ↓
Background: Mainstreaming genetic testing has emerged as a strategy to improve access and reduce wait times for patients who may benefit from genetic testing. Ensuring patients fully grasp the implications of testing when formal genetic counselling is not provided, remains a focus for ongoing research. Methods: Patients diagnosed with hypertrophic or dilated cardiomyopathy were offered genetic testing between September 2024 and September 2025 through either the mainstreaming model conducted in cardiology clinics or a referral to Medical Genetics where patients attended an online webinar or a one-on-one genetic counselling appointment. Uptake of testing, time to testing, informed choice and patient satisfaction were evaluated. Results: Among patients offered genetic testing, uptake was higher in the mainstreaming pathway (82%) compared with a referral to Medical Genetics (69%). The difference in access was predominately due to patients not following through with their Genetics referral. Mainstreaming reduced wait times where patients referred to Genetics waited a median of 94-185 additional days to be offered genetic testing. Despite improved access, only 62% of mainstreamed patients were considered informed, compared to 91% of patients that attended a patient webinar through Medical Genetics (p < 0.01). Satisfaction with decision-making was high across both pathways. Conclusion: Integrating genetic testing into cardiology practices increased access and reduced wait times; however, patients demonstrated significantly lower rates of informed decision making compared to those who attended a patient webinar offered through Medical Genetics. These findings highlight the importance of structured education to support informed decision making within mainstreaming pathways.
Free Newsletter

Clinical research that matters. Delivered to your inbox.

Join thousands of clinicians and researchers. No spam, unsubscribe anytime.