Optimizing Anticoagulation in Pregnancies With Mechanical Heart Valves
Official title: A Prospective Multicenter Cohort Pilot Study Comparing Antithrombotic Regimens in Pregnancies With Mechanical Heart Valves
Run by Mount Sinai Hospital, Canada · NCT07658989 · Data updated 2026-11-12
This study tests whether using low molecular weight heparin with low-dose aspirin during pregnancy is as safe and effective as the standard warfarin-based approach for people with mechanical heart valves.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years to 45 Years |
| Sex | Women only |
| Enrollment | 100 (estimated) |
| Sponsor | Mount Sinai Hospital, Canada Academic / other |
| Locations | 1 site (Toronto, Ontario) |
| Status | Recruiting |
| Started | May 26, 2026 |
| Main results expected | January 2030 |
| Study ends | December 2030 |
| Registry record updated | June 22, 2026 |
| Trial ID | NCT07658989 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Pregnant individuals with one or more mechanical heart valves, aged 18 or older, willing to participate, and presenting before 12 weeks gestation.
✕Probably not a fit
Patients who cannot tolerate the regimens or do not maintain adequate anticoagulation levels may not experience benefit and could face adverse events.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This multicenter pilot study compares two antithrombotic strategies for pregnant people with mechanical heart valves. It aims to determine whether LMWH with low-dose aspirin can achieve similar maternal and fetal safety and outcomes as warfarin-based therapy, with careful monitoring to ensure appropriate anticoagulation levels. The trial will enroll about 100 pregnancies, collect data, and use findings to plan a larger, definitive study on survival, clotting events, and cardiac function. Participation is limited to early pregnancy (<12 weeks) at qualified centers with appropriate monitoring capabilities.
Why it matters
Potential benefit: If successful, the study could identify an anticoagulation approach that maintains maternal and fetal safety during pregnancy for people with mechanical heart valves.
How similar studies have gone: Observational data exist but standardized, prospective multicenter data are limited, making this pilot study a novel step toward clearer guidance.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: 1. Pregnant individuals with one or more MHVs 2. Who consent to participate 3. Are 18 years or older and 4. Less than 12 weeks gestation Exclusion Criteria: 1. Have a platelet count less than 50 x 10(9)/L as there is an increased risk of bleeding with thrombocytopenia, and/or 2. Have active bleeding defined as bleeding resulting in a hemoglobin reduction ≥10 g/L or in hemodynamic instability. 3. Have new valve thrombosis identified immediately prior to pregnancy
Where it's running
-
Mount Sinai Hospital
Toronto, Ontario, Canada Recruiting
Study contacts
- Study coordinator: Nadine Shehata, MD
- Email: nadine.shehata@sinaihealth.ca
- Phone: 4165865133
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.