Twin study reveals genetic clues behind skipped heartbeats
NCT ID NCT05866731
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at whether genetics play a role in how often people have extra heartbeats (called PACs and PVCs). Researchers used portable heart monitors to track 156 identical and fraternal twins. By comparing the two groups, they hope to understand if these common heart rhythm patterns are inherited.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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156 people
The number who actually took part.
- Started
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Mar 2022
- Finished
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Aug 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Same-sex sets of twins from anywhere in the world can enroll, as all study procedures can be done remotely. Both twins must enroll to participate.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Identical or same-sex fraternal sets of twins * English-speaking Exclusion Criteria: * Pregnancy * Current anti-arrhythmic medication use (including beta blockers) * Diagnosis of congenital heart disease * Diagnosis of persistent or permanent atrial fibrillation * Prior cardiac ablation
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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University of California, San Francisco
San Francisco, California, 94143, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.