Study of Innovative Drug Strategies in Improving Left Ventricular Function After Mitral Repair

National Center for Cardiovascular Diseases

Status: Enrolling

Conditions: Congenital Mitral Insufficiency

Treatments: Drug: Spironolactone Tablets; Drug: Potassium citrate powder; Drug: Torsemide Tablets; Drug: Captopril Tablets; Drug: Metoprolol Oral Tablet

Study type: Observational

Funder types: Other

Identifiers

NCT06039592

2022-GSP-GG-19-3

Details and patient eligibility

About

The goal of this observational study is to compare the safety and effectiveness of a modified drug therapy with traditional drug therapy in pediatric patients after mitral repair.

The main questions it aims to answer are:

• Can a modified drug therapy improve both left ventricular and mitral valve function in pediatric patients after mitral repair?
• Can the adverse drug reactions caused by the modified drug therapy be non-inferior (clinically acceptable) to those of the traditional drug therapy? Participants will be assigned to either the Modified Drug Therapy Group (comprising angiotensin-converting enzyme inhibitor (ACE-I), beta-blockers, diuretics, potassium supplements, and spironolactone) or the Traditional Drug Therapy Group (diuretics and potassium supplements) based on personal preferences and clinical assessments by their attending physicians. They will undergo a 6-months course of medication. Additionally, echocardiography, electrocardiograms, complete blood counts, biochemical tests, and measurements of N-terminal pro-brain natriuretic peptide (NT-proBNP) were conducted before the initiation of medication therapy and at 1 month, 3 months, and 6 months after treatment commencement. Researchers will compare the Modified Drug Therapy Group and the Traditional Drug Therapy Group to see if the recurrence rate of moderate to severe mitral valve regurgitation, as assessed by echocardiography after 6 months of treatment, is lower in the former than in the latter.

Enrollment: 164 estimated patients

Sex: All

Ages: Under 14 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• under 14 years old
• after mitral valve repair

Exclusion criteria

• Patients with heart failure requiring ventricular assist or cardiac synchronization therapy
• Patients with severe pulmonary hypertension (pulmonary arterial pressure >6 Wood·U)
• Patients with severe liver and kidney failure
• Patients who are allergic to related medications
• Patients with symptomatic hypotension who cannot tolerate related drugs

Trial design

164 participants in 2 patient groups

Modified Drug Therapy Group

Description:

Patient in this group will undergo a one-year course of medication, including Captopril(tablet, 0.3mg/kg, tid), Metoprolol(tablet, 0.2mg/kg, bid), Spironolactone(tablet, 2-4mg/kg, bid), Torsemide(tablet, 0.2-0.5mg/ mg, bid), and Potassium Citrate(powder, 0.06g/kg, tid).

Treatment:

Drug: Metoprolol Oral Tablet

Drug: Potassium citrate powder

Drug: Captopril Tablets

Drug: Spironolactone Tablets

Drug: Torsemide Tablets

Traditional Drug Therapy Group

Description:

Patient in this group will undergo a one-year course of medication, including Torsemide(tablet, 0.2-0.5mg/mg, bid) and Potassium Citrate(powder, 0.06g/kg, tid).

Treatment:

Drug: Potassium citrate powder

Drug: Torsemide Tablets